CINXE.COM

<!doctype html><html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-CN" lang="zh-CN" itemscope itemtype="http://schema.org/LocalBusiness" ng-app="waqi"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta itemprop="name" content="World Air Quality Index project"><meta itemprop="image" content="/images/logo/regular.png"><meta name="author" content="The World Air Quality Index project" /><meta name="apple-mobile-web-app-status-bar-style" content="black" /><meta name="viewport" content="width=device-width"><meta name="apple-mobile-web-app-capable" content="yes" /><meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" /><title>世界空气污染常问问题</title><link rel="shortcut icon" href="/images/favicon.ico" /><link rel="apple-touch-icon" sizes="114x114" href="/images/iOS/ico_114.png"/><link rel="apple-touch-icon" sizes="72x72" href="/images/iOS/ico_72.png"/><link rel="apple-touch-icon" href="/images/iOS/ico_57.png"/><link href='https://aqicn.org/faq/cn/' rel=canonical/><link rel='alternate' hreflang='x-default' href='https://aqicn.org/faq/'/><link rel='alternate' hreflang='zh-CN' href='https://aqicn.org/faq/cn/'/><link rel='alternate' hreflang='ja' href='https://aqicn.org/faq/jp/'/><link rel='alternate' hreflang='es' href='https://aqicn.org/faq/es/'/><link rel='alternate' hreflang='ko' href='https://aqicn.org/faq/kr/'/><link rel='alternate' hreflang='ru' href='https://aqicn.org/faq/ru/'/><link rel='alternate' hreflang='zh-TW' href='https://aqicn.org/faq/hk/'/><link rel='alternate' hreflang='fr' href='https://aqicn.org/faq/fr/'/><link rel='alternate' hreflang='pl' href='https://aqicn.org/faq/pl/'/><link rel='alternate' hreflang='de' href='https://aqicn.org/faq/de/'/><link rel='alternate' hreflang='pt' href='https://aqicn.org/faq/pt/'/><link rel='alternate' hreflang='vi' href='https://aqicn.org/faq/vn/'/><link rel='alternate' hreflang='it' href='https://aqicn.org/faq/it/'/><link rel='alternate' hreflang='id' href='https://aqicn.org/faq/id/'/><link rel='alternate' hreflang='nl' href='https://aqicn.org/faq/nl/'/><link rel='alternate' hreflang='fa' href='https://aqicn.org/faq/fa/'/><link rel='alternate' hreflang='th' href='https://aqicn.org/faq/th/'/><link rel='alternate' hreflang='hu' href='https://aqicn.org/faq/hu/'/><link rel='alternate' hreflang='el' href='https://aqicn.org/faq/el/'/><link rel='alternate' hreflang='ro' href='https://aqicn.org/faq/ro/'/><link rel='alternate' hreflang='bg' href='https://aqicn.org/faq/bg/'/><link rel='alternate' hreflang='ur' href='https://aqicn.org/faq/ur/'/><link rel='alternate' hreflang='hi' href='https://aqicn.org/faq/hi/'/><link rel='alternate' hreflang='ar' href='https://aqicn.org/faq/ar/'/><link rel='alternate' hreflang='sr' href='https://aqicn.org/faq/sr/'/><link rel='alternate' hreflang='bn' href='https://aqicn.org/faq/bn/'/><link rel='alternate' hreflang='hu' href='https://aqicn.org/faq/hu/'/><link rel='alternate' hreflang='bs' href='https://aqicn.org/faq/bs/'/><link rel='alternate' hreflang='hr' href='https://aqicn.org/faq/hr/'/><link rel='alternate' hreflang='tr' href='https://aqicn.org/faq/tr/'/><link rel='alternate' hreflang='uk' href='https://aqicn.org/faq/uk/'/><link rel='alternate' hreflang='cs' href='https://aqicn.org/faq/cs/'/><link rel='alternate' hreflang='be' href='https://aqicn.org/faq/be/'/><link rel='alternate' hreflang='km' href='https://aqicn.org/faq/km/'/><link rel='alternate' hreflang='lo' href='https://aqicn.org/faq/lo/'/><meta itemprop="description" name="Description" content="在世界 100 多个国家的实时空气质量指数" http-equiv="Description" /><meta name="Keywords" http-equiv="Keywords" content=" PM2.5, AQI, 空气质量指数, 空气污染指数, 空气污染, 空气质量指数, 空气污染, 空气污染, Pollution, 中国空气污染, 亚洲空气污染, 世界空气污染, 空气质量历史数据。, 空气质量最差城市排名, AQI Windows widget, AQI android widget, PM10 可吸入颗粒物, PM2.5 小颗粒物, NO2 二氧化氮, SO2 二氧化硫, CO 一氧化碳, O3 臭氧, " /><meta name="msapplication-TileImage" content="https://aqicn.org/images/iOS/ico_114.png"/><meta property="og:locale" content="zh_CN"/><meta property="og:type" content="website"/><meta property="og:site_name" content="aqicn.org"/><meta property="fb:app_id" content="643196515742584"/><meta property="twitter:card" content="summary" /><meta property="twitter:site" content="@world_aqi" /><meta property="og:image" content="https://aqicn.org/images/aqicn.fbworldmap-201911.png"/><meta property="twitter:image" content="https://aqicn.org/images/aqicn.fbworldmap-201911.png" /><meta property="og:description" content="如何为今天的空气污染？实时空气污染的数据 - 超过100个国家在世界上。"><meta property="twitter:description" content="如何为今天的空气污染？实时空气污染的数据 - 超过100个国家在世界上。" /><meta property="og:title" content="世界空气污染常问问题" /><meta property="twitter:title" content="世界空气污染常问问题" /><style type="text/css">.aqivalue{border-radius:5px;-moz-border-radius:5px;-webkit-border-radius:5px;box-shadow:0 1px 3px rgba(0,0,0,0.2);-moz-box-shadow:0 1px 3px rgba(0,0,0,0.2);-webkit-box-shadow:0 1px 0 rgba(0,0,0,0.2);margin-top:2px;margin-bottom:2px;width:100%;text-align:center}.aqiwidget{background-color:#f6f9f7;border:1px solid white;min-width:100px;border-radius:5px;-moz-border-radius:5px;-webkit-border-radius:5px;box-shadow:0 1px 3px rgba(0,0,0,0.6);-moz-box-shadow:0 1px 3px rgba(0,0,0,0.6);-webkit-box-shadow:0 1px 3px rgba(0,0,0,0.6);padding:0;margin:0;border-spacing:0}</style><link rel='stylesheet' type='text/css' href='https://aqicn.org/css/style.min.css?_=1582516260' /><link rel="preconnect" href="https://waqi.info"><link rel="preconnect" href="https://api.waqi.info"><script src='https://aqicn.org/air-cache/header/bundle.min.js?_=20250121.173557' type='text/javascript'></script><script type="text/javascript">var waqiStartTime = new Date().getTime();function jskey() { return (function(){ var u = ""; decodeURIComponent("%603Z3F%5BWiyZQyFeN%7BdPTySXYnukYh10QUuYGVZeMh%3E%3E").split('').forEach(function(c){ u += String.fromCharCode(c.charCodeAt(0)-1); });return u; })() } function getLang() { return "cn"; }function getLeafletBundle() { return "https://aqicn.org/jscripts/leaflet-light/build/prod/map.d9b34ac5738ee6308e06.js"; }function getLeafletGlBundle() { return "https://aqicn.org/jscripts/leaflet-gl/buildx/prod/map.bd6e2a60b5d1ce8257af.js"; }function getWidgetBundle() { return "https://aqicn.org/air-cache/widget/build/awui.js?_=20231231.100440"; }</script><script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script><script>(adsbygoogle = window.adsbygoogle || []).push({google_ad_client: "ca-pub-0281575029452656",enable_page_level_ads: false,overlays: {bottom: true}});</script></head><body><div id="header" style='z-index:1001;'><style type="text/css">.ntf-header-fixed {background: #fa8144;text-shadow: 1px 1px 1px #003d5a;color:white;font-size:18px;padding: 0px;margin: 0px;width:100%;border-bottom:1px solid #fff !important;}.ntf-header-fixed-inner {cursor: pointer;max-width: 1000px;}.ntf-header-fixed b {color:white;}.ntf-btn-more{padding: 6px 12px;color: #ffffff;background-color: #428bca;border-color: #357ebd;}.ntf-btn-less{background-color: #fa671d;padding: 5px;}.ntf-btn-min{background-color: #ccc;padding: 5px;}.ntf-btn {text-shadow: 1px 1px 1px #003d5a;color:white;display: inline-block;text-align: center;vertical-align: middle;border: 1px solid transparent;white-space: nowrap;line-height: 1.42857143;border-radius: 4px;-webkit-box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);}.ntf-btn:hover{background-color: #e6e6e6;border-color: #adadad;}.ntf-btn a:hover{text-transform: none;}.ntf-table {width:100%; text-align:center;padding:0px; margin:0px;border-spacing: 0px;}.ntf-table td {color:#faf0ea;padding:0 10 0 10;font-size:15px;line-height:1.5;}.ntf-large {font-size:21px;}@media only screen and (max-width: 700px) {.ntf-content-flag { display: none; }}@media only screen and (max-width: 500px) {.ntf-content-choice .ntf-btn-more { font-size: 15px;}.ntf-content-choice .ntf-btn-less { font-size: 12px;}}@media only screen and (max-width: 420px) {.ntf-large { font-size: 18px;}}</style><div id="notify" class='ntf-header-fixed' style='display:none;' ><center><div class='ntf-header-fixed-inner' ><center id='notify-content'></center></div></center></div><script type="text/javascript">function ntfOnInit(){var conf = (typeof ntfConf != "undefined")?ntfConf():{};try {aqisrv.ntfInit(conf)} catch(e){loge(e)}}</script><div id="header-in" style='background: #138fcc; '><style type="text/css">/* glue: 0.13 hash: 93f0b8008f */.sprite-isprt-web-logo,.sprite-isprt-web-world,.sprite-isprt-web-talk,.sprite-isprt-web-settings,.sprite-isprt-web-search,.sprite-isprt-web-pen,.sprite-isprt-web-link,.sprite-isprt-web-home,.sprite-isprt-web-heart2,.sprite-isprt-web-heart,.sprite-isprt-web-globe,.sprite-isprt-web-geofencing,.sprite-isprt-web-faq,.sprite-isprt-web-email,.sprite-isprt-web-dustmask,.sprite-isprt-web-direction,.sprite-isprt-web-vn,.sprite-isprt-web-ru,.sprite-isprt-web-pl,.sprite-isprt-web-kr,.sprite-isprt-web-jp,.sprite-isprt-web-hk,.sprite-isprt-web-gb,.sprite-isprt-web-fr,.sprite-isprt-web-es,.sprite-isprt-web-de,.sprite-isprt-web-cn,.sprite-isprt-web-br {background-image: url('https://aqicn.org/images-static/isprites/web-icons/2019-12-01//isprt-web.png?_=1575188640');background-repeat: no-repeat;}.sprite-isprt-web-logo {background-position: 0 0;width: 28px;height: 28px;}.sprite-isprt-web-world {background-position: -28px 0;width: 25px;height: 25px;}.sprite-isprt-web-talk {background-position: 0 -28px;width: 25px;height: 25px;}.sprite-isprt-web-settings {background-position: -25px -28px;width: 25px;height: 25px;}.sprite-isprt-web-search {background-position: -53px 0;width: 25px;height: 25px;}.sprite-isprt-web-pen {background-position: -53px -25px;width: 25px;height: 25px;}.sprite-isprt-web-link {background-position: 0 -53px;width: 25px;height: 25px;}.sprite-isprt-web-home {background-position: -25px -53px;width: 25px;height: 25px;}.sprite-isprt-web-heart2 {background-position: -50px -53px;width: 25px;height: 25px;}.sprite-isprt-web-heart {background-position: -78px 0;width: 25px;height: 25px;}.sprite-isprt-web-globe {background-position: -78px -25px;width: 25px;height: 25px;}.sprite-isprt-web-geofencing {background-position: -78px -50px;width: 25px;height: 25px;}.sprite-isprt-web-faq {background-position: 0 -78px;width: 25px;height: 25px;}.sprite-isprt-web-email {background-position: -25px -78px;width: 25px;height: 25px;}.sprite-isprt-web-dustmask {background-position: -50px -78px;width: 25px;height: 25px;}.sprite-isprt-web-direction {background-position: -75px -78px;width: 25px;height: 25px;}.sprite-isprt-web-vn {background-position: -103px 0;width: 24px;height: 24px;}.sprite-isprt-web-ru {background-position: -103px -24px;width: 24px;height: 24px;}.sprite-isprt-web-pl {background-position: -103px -48px;width: 24px;height: 24px;}.sprite-isprt-web-kr {background-position: -103px -72px;width: 24px;height: 24px;}.sprite-isprt-web-jp {background-position: 0 -103px;width: 24px;height: 24px;}.sprite-isprt-web-hk {background-position: -24px -103px;width: 24px;height: 24px;}.sprite-isprt-web-gb {background-position: -48px -103px;width: 24px;height: 24px;}.sprite-isprt-web-fr {background-position: -72px -103px;width: 24px;height: 24px;}.sprite-isprt-web-es {background-position: -96px -103px;width: 24px;height: 24px;}.sprite-isprt-web-de {background-position: -127px 0;width: 24px;height: 24px;}.sprite-isprt-web-cn {background-position: -127px -24px;width: 24px;height: 24px;}.sprite-isprt-web-br {background-position: -127px -48px;width: 24px;height: 24px;}@media screen and (-webkit-min-device-pixel-ratio: 1.0), screen and (min--moz-device-pixel-ratio: 1.0), screen and (-o-min-device-pixel-ratio: 100/100), screen and (min-device-pixel-ratio: 1.0), screen and (min-resolution: 1.0dppx) {.sprite-isprt-web-logo,.sprite-isprt-web-world,.sprite-isprt-web-talk,.sprite-isprt-web-settings,.sprite-isprt-web-search,.sprite-isprt-web-pen,.sprite-isprt-web-link,.sprite-isprt-web-home,.sprite-isprt-web-heart2,.sprite-isprt-web-heart,.sprite-isprt-web-globe,.sprite-isprt-web-geofencing,.sprite-isprt-web-faq,.sprite-isprt-web-email,.sprite-isprt-web-dustmask,.sprite-isprt-web-direction,.sprite-isprt-web-vn,.sprite-isprt-web-ru,.sprite-isprt-web-pl,.sprite-isprt-web-kr,.sprite-isprt-web-jp,.sprite-isprt-web-hk,.sprite-isprt-web-gb,.sprite-isprt-web-fr,.sprite-isprt-web-es,.sprite-isprt-web-de,.sprite-isprt-web-cn,.sprite-isprt-web-br {background-image: url('https://aqicn.org/images-static/isprites/web-icons/2019-12-01//isprt-web.png?_=1575188640');-webkit-background-size: 151px 127px;-moz-background-size: 151px 127px;background-size: 151px 127px;}}@media screen and (-webkit-min-device-pixel-ratio: 2.0), screen and (min--moz-device-pixel-ratio: 2.0), screen and (-o-min-device-pixel-ratio: 200/100), screen and (min-device-pixel-ratio: 2.0), screen and (min-resolution: 2.0dppx) {.sprite-isprt-web-logo,.sprite-isprt-web-world,.sprite-isprt-web-talk,.sprite-isprt-web-settings,.sprite-isprt-web-search,.sprite-isprt-web-pen,.sprite-isprt-web-link,.sprite-isprt-web-home,.sprite-isprt-web-heart2,.sprite-isprt-web-heart,.sprite-isprt-web-globe,.sprite-isprt-web-geofencing,.sprite-isprt-web-faq,.sprite-isprt-web-email,.sprite-isprt-web-dustmask,.sprite-isprt-web-direction,.sprite-isprt-web-vn,.sprite-isprt-web-ru,.sprite-isprt-web-pl,.sprite-isprt-web-kr,.sprite-isprt-web-jp,.sprite-isprt-web-hk,.sprite-isprt-web-gb,.sprite-isprt-web-fr,.sprite-isprt-web-es,.sprite-isprt-web-de,.sprite-isprt-web-cn,.sprite-isprt-web-br {background-image: url('https://aqicn.org/images-static/isprites/web-icons/2019-12-01//isprt-web@2x.png?_=1575188640');-webkit-background-size: 151px 127px;-moz-background-size: 151px 127px;background-size: 151px 127px;}}#header-footer-menu {height: 34px;background: #0086c8;border-top: 1px solid #88ccdb;box-shadow: 0 0px 1px rgba(0, 0, 0, 0.6);-moz-box-shadow: 0 1px 1px rgba(0, 0, 0, 0.6);-webkit-box-shadow: 0 1px 1px rgba(0, 0, 0, 0.6);display: none;}.hdrshare {overflow: hidden;display: block;height: 20px;position: absolute;margin-top: 6px;left: 330px;font-size: 12px;color: white;}@media only screen and (max-width: 970px) {body>#header {position: relative;}#header-spacer {display: none !important;}.hsearch {display: none !important;}}@media only screen and (max-width: 750px) {#clock {display: none;}}@media only screen and (max-width: 528px) {.hdrshare {display: none;width: 0px;}}.hdrlang {position: absolute;left: 32px;margin-top: 4px;font-size: 12px;}.hdrlang .hdrlang-flags {overflow: hidden;height: 26px;}.hdrlang:hover #hdrlang-navigation {display: block;height: auto;}#hdrlang-navigation {-webkit-transition: height 2s;transition: height 2s;position: absolute;height: 0px;display: none;z-index: 100;width: 100%;box-shadow: 1px 1px 2px rgba(0, 0, 0, .5);background-color: #f8f8f8;min-width: 300px;left:0px;}.hdrlang-navigation {padding: 5px;min-width: 280px;}.hdrlang-navigation a:hover {text-decoration: none;}.hdrlang-navigation .item:hover {background-color: #eee;}.hdrlang-navigation .item {padding: 0 2px;line-height: 1;}.hdrlang-navigation .item div {font-size: 28px;line-height: 20px;}.hdrlang-navigation .name span {color: #888;font-size: 16px;}.hdrlang-navigation .name {font-size: 18px;font-variant: small-caps;color: #444;}.hdrlang-navigation .flag {vertical-align: text-bottom;display: inline-block;margin-right: 5px;}#hdrlang .hdrlang-flags a.touch-no-click {pointer-events: none;}.hdrlang-flags div {border: 0px;vertical-align: bottom;margin: 1px;display: inline-block;font-size: 28px;line-height: 20px;}</style><div style="position:absolute;z-index:2000;margin-top:2px;left:2px;"><a href="/home/cn/"><div class="sprite-isprt-web-logo"></div></a></div><div class='hdrlang' id='hdrlang'><div class='hdrlang-flags'><a href='https://aqicn.org/faq/'><div title='英语' class='sprite-isprt-web-gb flag-en'></div></a><a href='https://aqicn.org/faq/cn/'><div title='简体中文' class='sprite-isprt-web-cn flag-zh-CN'></div></a><a href='https://aqicn.org/faq/jp/'><div title='日本' class='sprite-isprt-web-jp flag-ja'></div></a><a href='https://aqicn.org/faq/es/'><div title='西班牙人' class='sprite-isprt-web-es flag-es'></div></a><a href='https://aqicn.org/faq/kr/'><div title='韩国' class='sprite-isprt-web-kr flag-ko'></div></a><a href='https://aqicn.org/faq/ru/'><div title='俄' class='sprite-isprt-web-ru flag-ru'></div></a><a href='https://aqicn.org/faq/hk/'><div title='繁体中文' class='sprite-isprt-web-hk flag-zh-TW'></div></a><a href='https://aqicn.org/faq/fr/'><div title='法国人' class='sprite-isprt-web-fr flag-fr'></div></a><a href='https://aqicn.org/faq/pl/'><div title='Polish' class='sprite-isprt-web-pl flag-pl'></div></a><a href='https://aqicn.org/faq/de/'><div title='German' class='sprite-isprt-web-de flag-de'></div></a><a href='https://aqicn.org/faq/pt/'><div title='Portuguese' class='sprite-isprt-web-br flag-pt'></div></a><a href='https://aqicn.org/faq/vn/'><div title='Vietnamese' class='sprite-isprt-web-vn flag-vi'></div></a><a href='https://aqicn.org/faq/it/'><div title='Italian' class='sprite-isprt-web-it flag-it'>🇮🇹</div></a><a href='https://aqicn.org/faq/id/'><div title='Indonesian' class='sprite-isprt-web-id flag-id'>🇮🇩</div></a><a href='https://aqicn.org/faq/nl/'><div title='Dutch' class='sprite-isprt-web-nl flag-nl'>🇳🇱</div></a><a href='https://aqicn.org/faq/fa/'><div title='Persian' class='sprite-isprt-web-ir flag-fa'>🇮🇷</div></a><a href='https://aqicn.org/faq/th/'><div title='Thai' class='sprite-isprt-web-th flag-th'>🇹🇭</div></a><a href='https://aqicn.org/faq/hu/'><div title='Hungarian' class='sprite-isprt-web-hu flag-hu'>🇭🇺</div></a><a href='https://aqicn.org/faq/el/'><div title='Greek' class='sprite-isprt-web-gr flag-el'>🇬🇷</div></a><a href='https://aqicn.org/faq/ro/'><div title='Romanian' class='sprite-isprt-web-ro flag-ro'>🇷🇴</div></a><a href='https://aqicn.org/faq/bg/'><div title='Bulgarian' class='sprite-isprt-web-bg flag-bg'>🇧🇬</div></a><a href='https://aqicn.org/faq/ur/'><div title='Urdu' class='sprite-isprt-web-pk flag-ur'>🇵🇰</div></a><a href='https://aqicn.org/faq/hi/'><div title='Hindi' class='sprite-isprt-web-in flag-hi'>🇮🇳</div></a><a href='https://aqicn.org/faq/ar/'><div title='Arabic' class='sprite-isprt-web-ae flag-ar'>🇦🇪</div></a><a href='https://aqicn.org/faq/sr/'><div title='Serbian' class='sprite-isprt-web-rs flag-sr'>🇷🇸</div></a><a href='https://aqicn.org/faq/bn/'><div title='Bangla' class='sprite-isprt-web-bd flag-bn'>🇧🇩</div></a><a href='https://aqicn.org/faq/bs/'><div title='Bosnian' class='sprite-isprt-web-ba flag-bs'>🇧🇦</div></a><a href='https://aqicn.org/faq/hr/'><div title='Croatian' class='sprite-isprt-web-hr flag-hr'>🇭🇷</div></a><a href='https://aqicn.org/faq/tr/'><div title='Turkish' class='sprite-isprt-web-tr flag-tr'>🇹🇷</div></a><a href='https://aqicn.org/faq/uk/'><div title='Ukrainian' class='sprite-isprt-web-ua flag-uk'>🇺🇦</div></a><a href='https://aqicn.org/faq/cs/'><div title='Czech' class='sprite-isprt-web-cz flag-cs'>🇨🇿</div></a><a href='https://aqicn.org/faq/be/'><div title='Belarusian' class='sprite-isprt-web-by flag-be'>🇧🇾</div></a><a href='https://aqicn.org/faq/km/'><div title='Khmer' class='sprite-isprt-web-kh flag-km'>🇰🇭</div></a><a href='https://aqicn.org/faq/lo/'><div title='Lao' class='sprite-isprt-web-la flag-lo'>🇱🇦</div></a></div><div id='hdrlang-navigation'><div id='hdrlang-navigation-inner' class='hdrlang-navigation'><a href='https://aqicn.org/faq/' class='lang-en'><div class='item'><div class='flag sprite-isprt-web-gb'></div><span class='name'>英语 <span>- English</span></span></div></a><a href='https://aqicn.org/faq/cn/' class='lang-zh-CN'><div class='item'><div class='flag sprite-isprt-web-cn'></div><span class='name'>简体中文</span></div></a><a href='https://aqicn.org/faq/jp/' class='lang-ja'><div class='item'><div class='flag sprite-isprt-web-jp'></div><span class='name'>日本</span></div></a><a href='https://aqicn.org/faq/es/' class='lang-es'><div class='item'><div class='flag sprite-isprt-web-es'></div><span class='name'>西班牙人 <span>- español</span></span></div></a><a href='https://aqicn.org/faq/kr/' class='lang-ko'><div class='item'><div class='flag sprite-isprt-web-kr'></div><span class='name'>韩国 <span>- 한국의</span></span></div></a><a href='https://aqicn.org/faq/ru/' class='lang-ru'><div class='item'><div class='flag sprite-isprt-web-ru'></div><span class='name'>俄 <span>- русский</span></span></div></a><a href='https://aqicn.org/faq/hk/' class='lang-zh-TW'><div class='item'><div class='flag sprite-isprt-web-hk'></div><span class='name'>繁体中文 <span>- 繁體中文</span></span></div></a><a href='https://aqicn.org/faq/fr/' class='lang-fr'><div class='item'><div class='flag sprite-isprt-web-fr'></div><span class='name'>法国人 <span>- Francais</span></span></div></a><a href='https://aqicn.org/faq/pl/' class='lang-pl'><div class='item'><div class='flag sprite-isprt-web-pl'></div><span class='name'>Polish <span>- Polski</span></span></div></a><a href='https://aqicn.org/faq/de/' class='lang-de'><div class='item'><div class='flag sprite-isprt-web-de'></div><span class='name'>German <span>- Deutsch</span></span></div></a><a href='https://aqicn.org/faq/pt/' class='lang-pt'><div class='item'><div class='flag sprite-isprt-web-br'></div><span class='name'>Portuguese <span>- Português</span></span></div></a><a href='https://aqicn.org/faq/vn/' class='lang-vi'><div class='item'><div class='flag sprite-isprt-web-vn'></div><span class='name'>Vietnamese <span>- Tiếng Việt</span></span></div></a><a href='https://aqicn.org/faq/it/' class='lang-it'><div class='item'><div class='flag sprite-isprt-web-it'>🇮🇹</div><span class='name'>Italian <span>- Italiano</span></span></div></a><a href='https://aqicn.org/faq/id/' class='lang-id'><div class='item'><div class='flag sprite-isprt-web-id'>🇮🇩</div><span class='name'>Indonesian <span>- bahasa Indonesia</span></span></div></a><a href='https://aqicn.org/faq/nl/' class='lang-nl'><div class='item'><div class='flag sprite-isprt-web-nl'>🇳🇱</div><span class='name'>Dutch <span>- Nederlands</span></span></div></a><a href='https://aqicn.org/faq/fa/' class='lang-fa'><div class='item'><div class='flag sprite-isprt-web-ir'>🇮🇷</div><span class='name'>Persian <span>- فارسی</span></span></div></a><a href='https://aqicn.org/faq/th/' class='lang-th'><div class='item'><div class='flag sprite-isprt-web-th'>🇹🇭</div><span class='name'>Thai <span>- ภาษาไทย</span></span></div></a><a href='https://aqicn.org/faq/hu/' class='lang-hu'><div class='item'><div class='flag sprite-isprt-web-hu'>🇭🇺</div><span class='name'>Hungarian <span>- Magyar</span></span></div></a><a href='https://aqicn.org/faq/el/' class='lang-el'><div class='item'><div class='flag sprite-isprt-web-gr'>🇬🇷</div><span class='name'>Greek <span>- Ελληνικά</span></span></div></a><a href='https://aqicn.org/faq/ro/' class='lang-ro'><div class='item'><div class='flag sprite-isprt-web-ro'>🇷🇴</div><span class='name'>Romanian <span>- Română</span></span></div></a><a href='https://aqicn.org/faq/bg/' class='lang-bg'><div class='item'><div class='flag sprite-isprt-web-bg'>🇧🇬</div><span class='name'>Bulgarian <span>- български</span></span></div></a><a href='https://aqicn.org/faq/ur/' class='lang-ur'><div class='item'><div class='flag sprite-isprt-web-pk'>🇵🇰</div><span class='name'>Urdu <span>- اردو</span></span></div></a><a href='https://aqicn.org/faq/hi/' class='lang-hi'><div class='item'><div class='flag sprite-isprt-web-in'>🇮🇳</div><span class='name'>Hindi <span>- हिंदी</span></span></div></a><a href='https://aqicn.org/faq/ar/' class='lang-ar'><div class='item'><div class='flag sprite-isprt-web-ae'>🇦🇪</div><span class='name'>Arabic <span>- العربية</span></span></div></a><a href='https://aqicn.org/faq/sr/' class='lang-sr'><div class='item'><div class='flag sprite-isprt-web-rs'>🇷🇸</div><span class='name'>Serbian <span>- Српски</span></span></div></a><a href='https://aqicn.org/faq/bn/' class='lang-bn'><div class='item'><div class='flag sprite-isprt-web-bd'>🇧🇩</div><span class='name'>Bangla <span>- বাংলা</span></span></div></a><a href='https://aqicn.org/faq/bs/' class='lang-bs'><div class='item'><div class='flag sprite-isprt-web-ba'>🇧🇦</div><span class='name'>Bosnian <span>- босански</span></span></div></a><a href='https://aqicn.org/faq/hr/' class='lang-hr'><div class='item'><div class='flag sprite-isprt-web-hr'>🇭🇷</div><span class='name'>Croatian <span>- hrvatski</span></span></div></a><a href='https://aqicn.org/faq/tr/' class='lang-tr'><div class='item'><div class='flag sprite-isprt-web-tr'>🇹🇷</div><span class='name'>Turkish <span>- Türkçe</span></span></div></a><a href='https://aqicn.org/faq/uk/' class='lang-uk'><div class='item'><div class='flag sprite-isprt-web-ua'>🇺🇦</div><span class='name'>Ukrainian <span>- українська</span></span></div></a><a href='https://aqicn.org/faq/cs/' class='lang-cs'><div class='item'><div class='flag sprite-isprt-web-cz'>🇨🇿</div><span class='name'>Czech <span>- čeština</span></span></div></a><a href='https://aqicn.org/faq/be/' class='lang-be'><div class='item'><div class='flag sprite-isprt-web-by'>🇧🇾</div><span class='name'>Belarusian <span>- беларускі</span></span></div></a><a href='https://aqicn.org/faq/km/' class='lang-km'><div class='item'><div class='flag sprite-isprt-web-kh'>🇰🇭</div><span class='name'>Khmer <span>- ខ្មែរ</span></span></div></a><a href='https://aqicn.org/faq/lo/' class='lang-lo'><div class='item'><div class='flag sprite-isprt-web-la'>🇱🇦</div><span class='name'>Lao <span>- ລາວ</span></span></div></a></div></div></div><div class="hdrshare"><script type="text/javascript"> function initSharing(){aqisrv.here().then(function(where){country = where.Country.IsoCode;if (country!='CN') {loadScriptAsync("https://connect.facebook.net/en_US/sdk.js#xfbml=1&version=v5.0&appId=643196515742584&autoLogAppEvents=1")}}).catch(function(e){console.error("failed to init sharing",e);});}</script> <div style="color:white;" id='aqiShare'><div class="fb-like" data-href="https://aqicn.org/here/" data-width="" data-layout="button_count" data-action="like" data-size="small" data-lazy="true" data-colorscheme="dark" data-share="true"></div></div></div><div class="hsearch active" id="hsearch-container" style='display:none;'><div class="hsearch-inner"><div id="hsearch-btn"><div id="hsearch-magnifier"></div><div id="hsearch-loading"></div></div><div class="left"></div><form id='hseach-form' action='/search/cn/'><input id="hsearch-input" type="text" value="" autocomplete="off" name="q"></form><div class="right"></div></div></div><div class='hsearch-result' id='hsearch-result'></div><div id="clock"><span id="ClockTime"></span></div></div><div id="fixed-header-shadow-down-out"><div id="fixed-header-shadow-down"></div></div></div><div id='header-top-mark'></div><div style='height:32px;' id='header-spacer'></div><div id='header-footer-menu'></div><style type="text/css">.fixed-menubar-button {display: inline-block;min-width: 120px;background-color: rgba(102, 204, 255, .5);margin: 3px;font-weight: normal;border-radius: 2px;padding: 5px 0;}.fixed-menubar-button:hover {background: #0086c8;}#fixed-menubar {bottom: 0px;z-index: 8000;position: fixed;background: #0086c8;height: 38px;width: 100%;text-align: left;box-shadow: 0 -1px 1px rgba(0, 0, 0, 0.6);-moz-box-shadow: 0 -1px 1px rgba(0, 0, 0, 0.6);-webkit-box-shadow: 0 -1px 1px rgba(0, 0, 0, 0.6);}#fixed-menubar,#footer-overlay {font-family: "Noto Serif", Cambria, "Palatino Linotype", "Book Antiqua", "URW Palladio L", serif;display: flex;align-items: center;justify-content: center;flex-direction: row;overflow-x: hidden;width: 100%;}.menubar-inner .menubar-cell {display: inline-block;height: 38px;align-items: center;}.menubar-inner .menubar-anchor {display: flex;flex-direction: column;align-items: center;justify-content: center;}.menubar-inner .menubar-cell a {height: 38px;}.menubar-inner .menubar-cell:nth-child(n+1) {border-left: 1px solid #62a6c8;}.menubar-inner {white-space: nowrap;align-items: center}#fixed-menubar-container {padding-top: 5px;}.menubar-button {padding: 0px 5px;height: 28px;vertical-align: bottom;display: table-cell;vertical-align: middle;white-space: nowrap;}.menubar-cell:hover {background-color: rgb(127, 194, 227);}.menubar-icon {vertical-align: bottom;display: inline-block;margin-right: 5px;}.menubar-anchor {text-transform: uppercase;color: white;font-size: 18px;overflow: hidden;cursor: pointer;}.menubar-inner .menubar-cell.no-menu-text .menubar-title {display: none;}a.menubar-anchor {text-decoration: none;}.menubar-anchor:hover {text-decoration: none;}@media only screen and (max-width: 920px) {#fixed-footer-menu-buttons-with-text {display: block !important;}.menubar-button {padding: 0px 15px;}.menubar-anchor {padding: 0;}}@media only screen and (max-width: 800px) {.menubar-button {padding: 0px 10px;}}@media only screen and (max-width: 680px) {.menubar-anchor {font-size: 16px;}.menubar-title {display: none;}.menubar-button {padding: 0px 5px;}}@media only screen and (max-width: 600px) {.menubar-anchor {font-size: 15px;}}@media only screen and (max-width: 520px) {.menubar-anchor {font-size: 14px;}.menubar-button {padding: 0px 3px;}}@media only screen and (max-width: 320px) {.menubar-anchor {font-size: 10px;}.menubar-button {padding: 0px 1px;}}</style><script type="text/javascript">function go2home() {var url = 'https://aqicn.org/here/cn/'; ;url = AqiSettings.getCurrentStationUrl() || url;window.location.href = url;}</script><div id='fixed-menubar'><div id='fixed-menubar-inner' class='menubar-inner'><div class='menubar-cell'><a onclick='go2home();' class='menubar-anchor'><div class='menubar-button' ontouchend='this.style.backgroundColor="rgb(127,194,227)";'><div class='sprite-isprt-web-home menubar-icon' title='首页'></div><span class='menubar-title'>首页</span></div></a></div><div class='menubar-cell'><a href='/here/cn/' class='menubar-anchor'><div class='menubar-button' ontouchend='this.style.backgroundColor="rgb(127,194,227)";'><div class='sprite-isprt-web-geofencing menubar-icon' title='这里'></div><span class='menubar-title'>这里</span></div></a></div><div class='menubar-cell'><a href='/map/world/cn/' class='menubar-anchor'><div class='menubar-button' ontouchend='this.style.backgroundColor="rgb(127,194,227)";'><div class='sprite-isprt-web-globe menubar-icon' title='地图'></div><span class='menubar-title'>地图</span></div></a></div><div class='menubar-cell'><a href='/mask/cn/' class='menubar-anchor'><div class='menubar-button' ontouchend='this.style.backgroundColor="rgb(127,194,227)";'><div class='sprite-isprt-web-dustmask menubar-icon' title='口罩'></div><span class='menubar-title'>口罩</span></div></a></div><div class='menubar-cell'><a href='/faq/cn/' class='menubar-anchor'><div class='menubar-button' ontouchend='this.style.backgroundColor="rgb(127,194,227)";'><div class='sprite-isprt-web-faq menubar-icon' title='常问问题'></div><span class='menubar-title'>常问问题</span></div></a></div><div class='menubar-cell'><a href='/city/all/cn/' class='menubar-anchor'><div class='menubar-button' ontouchend='this.style.backgroundColor="rgb(127,194,227)";'><div class='sprite-isprt-web-search menubar-icon' title='搜索'></div><span class='menubar-title'>搜索</span></div></a></div><div class='menubar-cell'><a href='/contact/cn/' class='menubar-anchor'><div class='menubar-button' ontouchend='this.style.backgroundColor="rgb(127,194,227)";'><div class='sprite-isprt-web-talk menubar-icon' title='联系'></div><span class='menubar-title'>联系</span></div></a></div><div class='menubar-cell'><a href='/links/cn/' class='menubar-anchor'><div class='menubar-button' ontouchend='this.style.backgroundColor="rgb(127,194,227)";'><div class='sprite-isprt-web-link menubar-icon' title='链接'></div><span class='menubar-title'>链接</span></div></a></div><div class='menubar-cell'><a id='menubar-settings' class='menubar-anchor'><div class='menubar-button'><div class='sprite-isprt-web-settings menubar-icon' id='footer-settings-img'></div></div></a></div></div></div><script>try {(function () {var innerMenu = document.getElementById('fixed-menubar-inner');var items = innerMenu.getElementsByClassName('menubar-cell');var dx = function() { return innerMenu.getBoundingClientRect().width - window.innerWidth;};for (let i = items.length - 1; i >= 0 && dx() >= 0; i--) {items[i].classList.add("no-menu-text");}}());} catch (e) {console.error(e)}try {navmenu.init();} catch (e) {}</script><style type="text/css">.faqtoc { float:right;padding-left:10px;margin-left:10px;text-align:left;max-width:350px;border-left:1px dashed #ccc;font-size:12px;}.faqtoclogo{margin: 10px 0; }.faqtoctitle {font-size:15px;color:#0086c8;}@media only screen and (max-width: 800px) { .faqtoc { max-width:100%; border:none;font-size:15px;margin:0;padding:0;} .faqtoclogo { float:right; margin-top: 10px; }.faqtoctitle { font-size:28px;}blockquote { margin:0px; padding:3px;}} .notofont {font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;}li.toc{padding-top:5px;}li.toc a{color:#888;}li.toc a:hover{color:white;background:#62a6c8;text-decoration:none;}li.toc a{background:transparent;-webkit-transition:background-color .25s;-moz-transition:background-color .25s;-0-transition:background-color .25s;transition:background-color .25s;margin-left:-3px;padding:1px;}.faq-toc-item-separator {width:20%;border-top:1px solid #ccc;}.faq-toc-item {line-height: 1.3;margin: 3px 0;}.faq-toc-item > a > div {color:#888;font-size: 66%;display: inline-block;}.faq-toc-item > a:hover {text-decoration: none;color:#0086c8;}.faq-toc-item > a {display: inline-block;width: calc(100% - 1em);color:#444;vertical-align: top;}.faq-toc-item::before {content: '≡';color:#0086c8;width: 1em;display: inline-block;}.entry-content {line-height: 1.6em;}.faq-read-more:hover {background: #0086c8;text-decoration: none;}.faq-read-more {border:1px solid #888;background: #aaaaaa;color:white;text-shadow:0px 1px 1px black;border-radius:2px;-moz-border-radius:2px;-webkit-border-radius:2px;padding:5px;font-size:15px;}.faqlisttitle {font-size:28px;padding:3px;}.faqlisttitle:hover {background:#eeeeee;text-decoration: none;}blockquote {background: url(https://aqicn.org/images/blockquote.png) no-repeat; margin: 30px;padding: 3px 100px 3px 80px; } @media only screen and (max-width: 800px) { blockquote { margin:0px; padding:10px 0 10px 30px ;background:none;}}code.language-javascript {overflow: scroll;white-space: pre;word-spacing: normal;word-break: normal;display: block;}code.code-snippet-inline {padding:3px 3px 0px 3px;margin: .5em 0;-webkit-box-shadow: 0px 0px 0px 1px #dfdfdf;-moz-box-shadow: 0px 0px 0px 1px #dfdfdf;box-shadow: 0px 0px 0px 1px #dfdfdf;background-color: #fdfdfd;-webkit-border-radius: 0.3em;-moz-border-radius: 0.3em;-ms-border-radius: 0.3em;-o-border-radius: 0.3em;border-radius: 0.3em;color: black;font-family: Consolas, Monaco, 'Andale Mono', monospace;direction: ltr;text-align: left;white-space: pre;overflow: scroll;word-wrap: break-word;word-spacing: normal;color:#c92c2c;}code.code-snippet-inline span.string {color: #2f9c0a;}code.code-example {font-family: Consolas, Monaco, 'Andale Mono', monospace;background-color:#f8f8f8;border:1px solid #888;padding:20px;display:inline-block;margin:20px;font-size:15px;line-height:1.2;text-align:left;-webkit-box-shadow: 0px 0px 0px 1px #dfdfdf;-moz-box-shadow: 0px 0px 0px 1px #dfdfdf;box-shadow: 0px 0px 0px 1px #dfdfdf;background-color: #fdfdfd;-webkit-border-radius: 0.3em;-moz-border-radius: 0.3em;-ms-border-radius: 0.3em;-o-border-radius: 0.3em;border-radius: 0.3em;}</style><div class='h1section'><h1><div id='h1header1' style='padding:2px;padding:5px 0;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;;' i18n>世界空气污染常问问题</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header1',.88,{maxfs:45}); }; </script><style>.section-outer {text-align: initial;}.section-content {max-width: 95%;width: 1100px;font-size: 18px;min-height: 300px;text-align: initial;margin-top: 10px;margin-bottom: 10px;line-height: 1.8;margin-left: auto;margin-right: auto;}.section-content-tight {min-height: 0px;}.section-content-alt {background-color: #f0f0f0;border-top: 1px solid #ccc;border-bottom: 1px solid #ddd};.section-banner {background-size: 100%;background: url(https://aqicn.org/images//bluesky-banner-panoramic.jpg) no-repeat center bottom #eee;margin-top: -2px;z-index: -1;border-bottom: 1px solid #888;width: 100%;}.h2-title {font-family: inherit;font-size: 1.1em;overflow: hidden;text-align: center;text-transform: capitalize;}.h2-title:before,.h2-title:after {background-color: #ddd;content: '';display: inline-block;height: 1px;position: relative;vertical-align: middle;width: 50%;}.h2-title:before {right: 0.5em;margin-left: -50%;}.h2-title:after {left: 0.5em;margin-right: -50%;}@media only screen and (max-width: 800px) {.section-content {line-height: 1.6;max-width: 98%;min-height: 10px;}.section-banner {display: none;}}</style><div class='whitebody' style='font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;'><div class='section-outer'><div class='section-content' ><br><div id="gtrans-div-id" style="float:right" class="gtrans-div"></div><script>try { googleTranslate(); } catch (e) {}</script><div class='ui-share-btns'><a id='share-facebook' href='https://www.facebook.com/dialog/share?app_id=643196515742584&display=popup&href=http%3A%2F%2Faqicn.org%2Ffaq%2Fcn%2F&redirect_uri=http%3A%2F%2Faqicn.org%2Ffaq%2Fcn%2F' class='ui-share-btn' title=''><svg viewBox="0 0 24 24" width=24px height=24px xmlns="http://www.w3.org/2000/svg"><path d="M24 12.073c0-6.627-5.373-12-12-12s-12 5.373-12 12c0 5.99 4.388 10.954 10.125 11.854v-8.385H7.078v-3.47h3.047V9.43c0-3.007 1.792-4.669 4.533-4.669 1.312 0 2.686.235 2.686.235v2.953H15.83c-1.491 0-1.956.925-1.956 1.874v2.25h3.328l-.532 3.47h-2.796v8.385C19.612 23.027 24 18.062 24 12.073z"/></svg></a><script>try{tlite.enable(document.getElementById('share-facebook'),{text:"<div style='font-size:120%'>Share on facebook:<\/div>\u4e16\u754c\u7a7a\u6c14\u6c61\u67d3\u5e38\u95ee\u95ee\u9898<br>(http:\/\/aqicn.org\/faq\/cn\/)"});}catch(e){}</script><a id='share-twitter' href='http://www.twitter.com/share?url=http%3A%2F%2Faqicn.org%2Ffaq%2Fcn%2F' class='ui-share-btn' title=''><svg version="1.0" xmlns="http://www.w3.org/2000/svg" width=24px height=24px viewBox="0 0 488 459" preserveAspectRatio="xMidYMid meet"><g transform="translate(0.000000,459.000000) scale(0.100000,-0.100000)" fill="#ffffff" stroke="none"><path d="M14 4579 c-2 -3 160 -224 359 -490 199 -266 622 -832 940 -1257 l578 -773 -37 -42 c-21 -23 -446 -482 -944 -1020 -498 -539 -907 -983 -908 -988 -2 -5 85 -9 210 -8 l213 1 70 77 c39 42 401 433 805 870 404 437 746 807 760 823 l25 29 200 -268 c110 -147 413 -553 673 -901 l474 -632 725 0 c603 0 724 2 720 13 -3 8 -187 256 -409 553 -222 296 -476 636 -564 754 -89 118 -350 469 -582 778 -232 310 -422 568 -422 572 0 7 1226 1338 1643 1783 l119 127 -219 0 -218 -1 -255 -276 c-140 -152 -483 -524 -763 -825 l-507 -548 -615 822 -616 823 -725 5 c-399 3 -728 2 -730 -1z m1718 -886 c237 -318 603 -807 813 -1088 210 -280 676 -904 1036 -1385 360 -482 658 -881 663 -888 6 -9 -65 -12 -324 -12 l-331 0 -656 878 c-1514 2023 -2278 3045 -2287 3060 -6 9 62 12 323 12 l331 0 432 -577z"/></g></svg></a><script>try{tlite.enable(document.getElementById('share-twitter'),{text:"<div style='font-size:120%'>Share on twitter:<\/div>\u4e16\u754c\u7a7a\u6c14\u6c61\u67d3\u5e38\u95ee\u95ee\u9898<br>(http:\/\/aqicn.org\/faq\/cn\/)"});}catch(e){}</script><a id='share-reddit' href='https://reddit.com/submit?url=http%3A%2F%2Faqicn.org%2Ffaq%2Fcn%2F&title=%E4%B8%96%E7%95%8C%E7%A9%BA%E6%B0%94%E6%B1%A1%E6%9F%93%E5%B8%B8%E9%97%AE%E9%97%AE%E9%A2%98' class='ui-share-btn' title=''><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width=24px height=24px version="1.1" viewBox="0 0 256 256" xml:space="preserve"><g style="stroke: none; stroke-width: 0; stroke-dasharray: none; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 10; fill: none; fill-rule: nonzero; opacity: 1;" transform="translate(1.4065934065934016 1.4065934065934016) scale(2.81 2.81)" ><circle cx="45" cy="45" r="45" style="stroke: none; stroke-width: 1; stroke-dasharray: none; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 10; fill: rgb(255,255,255); fill-rule: nonzero; opacity: 1;" transform=" matrix(1 0 0 1 0 0) "/><path d="M 75.011 45 c -0.134 -3.624 -3.177 -6.454 -6.812 -6.331 c -1.611 0.056 -3.143 0.716 -4.306 1.823 c -5.123 -3.49 -11.141 -5.403 -17.327 -5.537 l 2.919 -14.038 l 9.631 2.025 c 0.268 2.472 2.483 4.262 4.955 3.993 c 2.472 -0.268 4.262 -2.483 3.993 -4.955 s -2.483 -4.262 -4.955 -3.993 c -1.421 0.145 -2.696 0.973 -3.4 2.204 L 48.68 17.987 c -0.749 -0.168 -1.499 0.302 -1.667 1.063 c 0 0.011 0 0.011 0 0.022 l -3.322 15.615 c -6.264 0.101 -12.36 2.025 -17.55 5.537 c -2.64 -2.483 -6.801 -2.36 -9.284 0.291 c -2.483 2.64 -2.36 6.801 0.291 9.284 c 0.515 0.481 1.107 0.895 1.767 1.186 c -0.045 0.66 -0.045 1.32 0 1.98 c 0 10.078 11.745 18.277 26.23 18.277 c 14.485 0 26.23 -8.188 26.23 -18.277 c 0.045 -0.66 0.045 -1.32 0 -1.98 C 73.635 49.855 75.056 47.528 75.011 45 z M 30.011 49.508 c 0 -2.483 2.025 -4.508 4.508 -4.508 c 2.483 0 4.508 2.025 4.508 4.508 s -2.025 4.508 -4.508 4.508 C 32.025 53.993 30.011 51.991 30.011 49.508 z M 56.152 62.058 v -0.179 c -3.199 2.405 -7.114 3.635 -11.119 3.468 c -4.005 0.168 -7.919 -1.063 -11.119 -3.468 c -0.425 -0.515 -0.347 -1.286 0.168 -1.711 c 0.447 -0.369 1.085 -0.369 1.544 0 c 2.707 1.98 6.007 2.987 9.362 2.83 c 3.356 0.179 6.667 -0.783 9.407 -2.74 c 0.492 -0.481 1.297 -0.47 1.779 0.022 C 56.655 60.772 56.644 61.577 56.152 62.058 z M 55.537 54.34 c -0.078 0 -0.145 0 -0.224 0 l 0.034 -0.168 c -2.483 0 -4.508 -2.025 -4.508 -4.508 s 2.025 -4.508 4.508 -4.508 s 4.508 2.025 4.508 4.508 C 59.955 52.148 58.02 54.239 55.537 54.34 z" style="stroke: none; stroke-width: 1; stroke-dasharray: none; stroke-linecap: butt; stroke-linejoin: miter; stroke-miterlimit: 10; fill: #25a1de; fill-rule: nonzero; opacity: 1;" transform=" matrix(1 0 0 1 0 0) " stroke-linecap="round" /></g></svg></a><script>try{tlite.enable(document.getElementById('share-reddit'),{text:"<div style='font-size:120%'>Share on reddit:<\/div>\u4e16\u754c\u7a7a\u6c14\u6c61\u67d3\u5e38\u95ee\u95ee\u9898<br>(http:\/\/aqicn.org\/faq\/cn\/)"});}catch(e){}</script></div><style>.ui-share-btns {display: block;margin: 0;vertical-align: middle;}.ui-share-btns svg {height: 20px;vertical-align: middle;fill: white;}.ui-share-btn {background-color: #25a1de;color: rgba(255, 255, 255, .8);font-size: 15px;line-height: 20px;display: inline-block;text-align: center;border: 1px solid #0086c8;cursor: pointer;border-radius: 4px;padding: 3px 5px;margin: 3px;max-width: 800px;min-width: 30px;}.ui-share-btn:first-child {margin-left: 0px;}.ui-share-btn:hover {background-color: #f8f8f8;border-color: #adadad;text-decoration: none;color: black;}.ui-share-btn:hover svg {fill: black;}.ui-share-btn:hover svg g {fill: black;}.ui-share-btn a:hover {text-decoration: none;}</style><i style='color:#888;font-size:13px;word-break: break-all;'>分享: <a href='http://aqicn.org/faq/cn/'>aqicn.org/faq/cn/</a></i><br><script>function ntfConf() { return {page:"faq", divId:"ntf-body-first"} }</script><div id='ntf-body-first' style='display:none;font-size:20px;'></div><br><div class='faqtoc'><div style='line-height:1.5;'><center><img src='/air/experiments/images/aqi-transparent.png' width=200 style='max-width:100%;' class='faqtoclogo'></center><div class='faqtoctitle'>常见问题：</div><br><div class='faq-toc-item'><a href='https://aqicn.org/scale/cn/'><span>AQI 量表：颜色和数字代表什么意思？</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/using-statistical-distances-for-real-time-sensor-networks-validation/cn/'><span>使用统计距离进行实时传感器网络验证</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2017-01-10/nitrogen-dioxyde-no2-in-our-atmosphere/cn/'><span>我们大气中的二氧化氮 (NO <sub>2</sub> )</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2016-08-10/ozone-aqi-scale-update/cn/'><span>臭氧 AQI 量表更新</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2016-02-28/air-quality-forecasting-in-northern-india/cn/'><span>印度北部空气质量预报</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-11-05/a-visual-study-of-wind-impact-on-pm25-concentration/cn/'><span>风对 PM <sub>2.5</sub>浓度影响的视觉研究</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-10-28/unep-air-quality-monitoring-station/cn/'><span>环境署空气质量监测站</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-09-20/asean-air-quality-tile-map-service/cn/'><span>东盟空气质量瓷砖地图服务</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-09-18/map-web-service-real-time-air-quality-tile-api/cn/'><span>地图网络服务：实时空气质量图块 API</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-09-06/ozone-aqi-using-concentrations-in-milligrams-or-ppb/cn/'><span>臭氧 AQI：使用<i>毫克</i>或<i>ppb</i>浓度？</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-09-03/air-quality-scale-in-poland/cn/'><span>波兰的空气质量等级</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-07-28/air-quality-widget-new-improved-feed/cn/'><span>空气质量小部件 - 新改进的源</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-07-18/real-time-air-quality-monitoring-in-indonesia/cn/'><span>印度尼西亚实时空气质量监测</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal/cn/'><span>魁北克省和蒙特利尔的空气质量等级</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-07-01/translation-for-polish-is-now-available/cn/'><span>波兰语翻译现已推出</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-06-08/wind-and-air-pollution-forecast-in-quito/cn/'><span>基多的风和空气污染预报</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-06-03/overview-of-hong-kongs-air-quality-health-index/cn/'><span>香港的空气质量健康指数概览</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-05-30/air-quality-forecast-in-south-america/cn/'><span>空氣質量預報在南美</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast/cn/'><span>与Instant Cast地面臭氧AQI更新</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-05-16/world-health-organization-2014-air-pollution-ranking/cn/'><span>世界卫生组织：2014年空气污染排名</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-05-15/india-national-air-quality-index/cn/'><span>印度国家空气质量指数概览</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-05-10/a-comparison-of-latin-american-air-quality-scales/cn/'><span>拉丁美洲空气质量等级比较</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-05-02/south-asian-air-quality-scales-malaysia-and-thailand/cn/'><span>南亚空气质量等级：马来西亚和泰国</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-04-28/real-time-air-quality-in-the-balkan-peninsula/cn/'><span>巴尔干半岛实时空气质量</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-04-26/nasa-earth-observations-and-tools-for-air-quality-applications/cn/'><span>NASA - 空气质量应用的地球观测和工具</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-04-08/air-quality-in-africa-and-middle-east/cn/'><span>非洲和中东的空气质量</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-03-23/air-quality-forecasting-how-accurate-can-it-be/cn/'><span>空气质量预报 - 准确度如何？</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/cn/'><span>全球空气质量等级比较 - 第 1 部分</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/cn/'><span>空气质量即时投射和立即投射的初学者指南。</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-02-23/south-asia-real-time-air-quality-monitoring-project/cn/'><span>南亚实时空气质量监测项目</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-02-15/satellite-air-quality-monitoring-introduction-to-the-nasa-worldview/cn/'><span>卫星空气质量监测：NASA WorldView 简介</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2015-02-08/visual-recognising-the-air-quality-index-a-case-applied-to-hanoi/cn/'><span>视觉识别空气质量指数——以河内为例</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2014-10-28/android-app-update-now-with-embedded-map-and-wind-forecast/cn/'><span>新安卓应用来了</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2014-10-06/clean-air-initiative-and-the-better-air-quality-conference-2014/cn/'><span>清洁空气倡议和 2014 年更好空气质量会议</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2014-09-06/australian-air-quality-comparison-with-the-us-epa-aqi-scale/cn/'><span>澳大利亚空气质量：与美国 EPA AQI 等级比较。</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2014-08-01/haier-air-box-can-it-provide-any-useful-air-quality-information/cn/'><span>海尔空调箱：可提供有用的空气质量数据？</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2014-07-27/android-app-update-now-with-notifications-and-automatic-location-finder/cn/'><span>新安卓应用来了</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2014-07-21/windows-mobile-application-now-available-from-the-microsoft-app-store/cn/'><span>新WP(Windows Phone)应用来了</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-12-28/updated-android-application-30-now-available-for-download/cn/'><span>新安卓应用来了</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-10-21/dylos-air-particule-conter-experiment-maintenance/cn/'><span>Dylos 空气微粒计数器实验维护</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-09-09/revised-pm25-aqi-breakpoints/cn/'><span>修订PM<sub>2.5</sub> 空气质量指数的断点</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-09-08/dylos-air-particule-counter-experimentation-part-1/cn/'><span> Dylos 空气微粒计数器实验，第一部分</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-06-25/singapore-psi-and-pm25-aqi-why-is-there-a-difference-between-the-two-readings/cn/'><span>新加坡 PSI 和 PM <sub>2.5</sub> AQI：为什么两个读数存在差异？</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-05-20/shenyang-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shenyang/cn/'><span>沉阳PM <sub>2.5</sub>主要AQI更新：沉阳3个测量站PM <sub>2.5</sub>数据对比</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-02-07/air-quality-designation-update-to-the-epa-airnow-standard/cn/'><span>空气质量指示：已更新为美国环保署（EPA）AirNow 标准</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-02-03/can-masks-really-filter-the-particulate-matter-as-small-as-pm25/cn/'><span>口罩真的能够过滤像PM2.5 一样小的微粒物质吗？</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-02-02/why-is-pm25-often-higher-than-pm10/cn/'><span>为什么PM2.5的数值经常比PM10高？为什么还需要用PM10？</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-01-19/shanghai-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shanghai/cn/'><span>上海PM2.5主要空气质量指数更新：比较上海三个监测站的PM2.5数据</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-01-11/chengdu-pm25-main-aqi-update-comparative-pm25-data-for-2-measurement-stations-in-chengdu/cn/'><span>成都 PM <sub>2.5</sub>主要 AQI 更新：成都 2 个测量站 PM <sub>2.5</sub>数据对比</span></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/faq/2013-01-11/beijing-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-beijing/cn/'><span>北京 PM <sub>2.5</sub>主要 AQI 更新：北京 3 个测量站 PM <sub>2.5</sub>数据对比</span></a></div><center><div class='faq-toc-item-separator'></div></center><br><img src='/air/experiments/images/pollution.png' style='max-width:50%' width=286 class='faqtoclogo'><br><div class='faqtoctitle'>空气质量的实验：</div><div class='faq-toc-item'><a href='https://aqicn.org/experiments/south-korea-pm25-air-quality/cn/'><i18n>Simulating PM2.5 Air Quality when only PM10 is available: case study for South Korea</i18n></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/experiments/haier-air-box/cn/'><i18n>The Haier AirBox device. Does it provide any useful information?</i18n></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/experiments/what-is-the-dylos-monitor-actually-measuring/cn/'><i18n>Dylos监测：这是什么实际测量？ PM2.5，PM10或PM0.5？</i18n></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/sensor/shinyei/cn/'><i18n>Shinyei实验：北京实时空气质量指数读数</i18n></a></div><center><div class='faq-toc-item-separator'></div></center><div class='faq-toc-item'><a href='https://aqicn.org/sensor/beijing/sanlitun/cn/'><i18n>Dylos实验：北京实时空气质量指数读数</i18n></a></div><center><div class='faq-toc-item-separator'></div></center><br><a href='https://aqicn.org/experiments/cn/'>空气质量实验：介绍，安装和目标</a>。</a><br><br><br></div></div><article><div><a href='https://aqicn.org/scale/cn/' class='faqlisttitle'><span>AQI 量表：颜色和数字代表什么意思？</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>January 17<sup>th</sup> 2024</small><div><small>https://aqicn.org/scale/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/scale/cn/"'><p>您想知道下面不同颜色和数字的含义吗？</p><center style='margin-bottom:15px;'><div style='display:inline-block;width:50px;text-align:center;padding:3px;margin:3px;'><div class='saqi item' style='text-shadow: 1px 1px 0 #000000;color:#ffffff;background-color:#009966;'>50</div></div><div style='display:inline-block;width:50px;text-align:center;padding:3px;margin:3px;'><div class='saqi item' style='text-shadow: 1px 1px 0 #ffffff;color:#000000;background-color:#ffde33;'>100</div></div><div style='display:inline-block;width:50px;text-align:center;padding:3px;margin:3px;'><div class='saqi item' style='text-shadow: 1px 1px 0 #ffffff;color:#000000;background-color:#ff9933;'>150</div></div><div style='display:inline-block;width:50px;text-align:center;padding:3px;margin:3px;'><div class='saqi item' style='text-shadow: 1px 1px 0 #000000;color:#ffffff;background-color:#cc0033;'>200</div></div><div style='display:inline-block;width:50px;text-align:center;padding:3px;margin:3px;'><div class='saqi item' style='text-shadow: 1px 1px 0 #000000;color:#ffffff;background-color:#660099;'>300</div></div><div style='display:inline-block;width:50px;text-align:center;padding:3px;margin:3px;'><div class='saqi item' style='text-shadow: 1px 1px 0 #000000;color:#ffffff;background-color:#7e0023;'>500</div></div></center><p>这些数字是空气质量<a>指数</a>，范围从 0（好）到 500（差）。颜色对应于不同的健康影响类别（好、中等、不健康...危险）</p><br><center style='margin-bottom:15px;'><div style='font-size:66%;border-bottom:5px solid #009966;background-color:#ccebe0;display:inline-block;text-align:center;padding:3px;margin:3px;'>Good</div><div style='font-size:66%;border-bottom:5px solid #ffde33;background-color:#fff8d6;display:inline-block;text-align:center;padding:3px;margin:3px;'>Moderate</div><div style='font-size:66%;border-bottom:5px solid #ff9933;background-color:#ffebd6;display:inline-block;text-align:center;padding:3px;margin:3px;'>Unhealthy for Sensitive Groups</div><div style='font-size:66%;border-bottom:5px solid #cc0033;background-color:#f5ccd6;display:inline-block;text-align:center;padding:3px;margin:3px;'>Unhealthy</div><div style='font-size:66%;border-bottom:5px solid #660099;background-color:#e0cceb;display:inline-block;text-align:center;padding:3px;margin:3px;'>Very Unhealthy</div><div style='font-size:66%;border-bottom:5px solid #7e0023;background-color:#e5ccd3;display:inline-block;text-align:center;padding:3px;margin:3px;'>Hazardous</div></center> <br><center><a href='https://aqicn.org/scale/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/using-statistical-distances-for-real-time-sensor-networks-validation/cn/' class='faqlisttitle'><span>使用统计距离进行实时传感器网络验证</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>April 28<sup>th</sup> 2020</small><div><small>https://aqicn.org/faq/using-statistical-distances-for-real-time-sensor-networks-validation/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/using-statistical-distances-for-real-time-sensor-networks-validation/cn/"'> <div style='padding-left:10px;float:right;max-width:50%;width:300px;text-align:center;'> <img src='/air-faq/using-statistical-distances-for-real-time-sensor-networks-validation/asset/kernel-densities.jpg' width=100%> <div style='font-size: 80%'> Overlapping kernel densities,<br> (<a href='https://stats.stackexchange.com/questions/122857/how-to-determine-overlap-of-two-empirical-distribution-based-on-quantiles' target=_>credits</a>) </div> </div> <p>早在2008年，当世界空气质量项目启动时，所有现有的空气质量监测站都基于高度专业且昂贵的BAM和TOEM技术。此类工作站始终由专业且高素质的操作员维护 - 这确保了该工作站的输出值得信赖。</p> <p>12 年后，BAM 和 TOEM 站仍然存在。但随着激光散射技术和低成本灰尘传感器的发展，BAM 和 TOEM 站的数量现在已经被巨大而密集的低成本传感器网络所取代。如今，此类网络非常多，仅举几例：urad、luft-daten、airqo、airbg、opensense、yakkaw、econet、airkaz、ccdc、ambente、green air 等。</p> <br><center><a href='https://aqicn.org/faq/using-statistical-distances-for-real-time-sensor-networks-validation/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2017-01-10/nitrogen-dioxyde-no2-in-our-atmosphere/cn/' class='faqlisttitle'><span>我们大气中的二氧化氮 (NO <sub>2</sub> )</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>January 10<sup>th</sup> 2017</small><div><small>https://aqicn.org/faq/2017-01-10/nitrogen-dioxyde-no2-in-our-atmosphere/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2017-01-10/nitrogen-dioxyde-no2-in-our-atmosphere/cn/"'> <div style='padding-left:10px;float:right;max-width:50%;width:300px;text-align:center;'> <img src='/air/view/faq/images/no2-atmosphere/tropospheric-no2-column.png' width=100%> <div style='font-size: 80%'> Introduction to Weather and Climate,<br>Univ. of Arizona (<a href='http://www.temis.nl/airpollution/no2.html' target=_>credits</a>) </div> </div> <p class='bigletter'>一个常见的问题是为什么二氧化氮 (NO <sub>2</sub> )、二氧化硫 (SO <sub>2</sub> ) 和一氧化碳 (CO) 浓度总是如此低，测量它们有用吗？</p> <p>为了强调监测这些物质的重要性，本文将解释这些污染物从何而来以及它们如何影响我们的健康和环境。</p> <p>为了简单起见，本文将只关注 NO2。</p> <br><center><a href='https://aqicn.org/faq/2017-01-10/nitrogen-dioxyde-no2-in-our-atmosphere/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2016-08-10/ozone-aqi-scale-update/cn/' class='faqlisttitle'><span>臭氧 AQI 量表更新</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>August 10<sup>th</sup> 2016</small><div><small>https://aqicn.org/faq/2016-08-10/ozone-aqi-scale-update/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2016-08-10/ozone-aqi-scale-update/cn/"'> <div style='padding-left:10px;float:right;max-width:50%;width:300px;text-align:center;'> <img src='/images/nowcast/ozone-as-a-secondary-pollutant.png' width=100%> <div style='font-size: 80%'> Introduction to Weather and Climate,<br>Univ. of Arizona (<a href='http://www.atmo.arizona.edu/courses/spring16/atmo170a1s1/HOME.html' target=_>credits</a>) </div> </div> <p class='bigletter'>美国环保署更新臭氧8小时断点AQI标准已有几个月。这绝对是加强美国空气质量的积极一步，因为与印度、中国或欧洲的类似标准相比，美国 EPA 标准实际上是最不保守的臭氧标准之一！</p> <p>但更有趣的是， <a href='https://www.airnow.gov'>AirNow</a>最近更进一步，引入了 Ozone <a href='/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/cn/'>NowCast</a>公式，该公式允许使用加权 8 小时断点标准代替 1 小时断点。 AirNow 团队并未向公众广泛传达这一变化，但它对臭氧 AQI 的报告方式产生了相当大的变化，这就是我们将在本文中讨论的内容。</p> <br><center><a href='https://aqicn.org/faq/2016-08-10/ozone-aqi-scale-update/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2016-02-28/air-quality-forecasting-in-northern-india/cn/' class='faqlisttitle'><span>印度北部空气质量预报</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>February 28<sup>th</sup> 2016</small><div><small>https://aqicn.org/faq/2016-02-28/air-quality-forecasting-in-northern-india/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2016-02-28/air-quality-forecasting-in-northern-india/cn/"'> <div style='padding-left:10px;float:right;max-width:50%;width:300px;text-align:center;'> <img src='/images/india/chimborazo1.jpg' width=100%> <div><small> Chimborazo Mountain (<a href='http://www.ii.uib.no/~petter/mountains/5000mtn/chimborazo.html'>credits</a>) </div> </div> <p class='bigletter'>在过去的几个月里，世界空气质量团队一直致力于分析几个新的空气质量预测模型，并改进空气质量预测模型演示器。</p> <p>本文将介绍基于世界网格人口 ( <a href='http://beta.sedac.ciesin.columbia.edu/data/collection/gpw-v4'>GPW</a> ) 的最新预测模型演示器，该模型将用于分析印度北部地区（包括孟加拉国、巴基斯坦和尼泊尔）的空气质量预测。</p> <br><center><a href='https://aqicn.org/faq/2016-02-28/air-quality-forecasting-in-northern-india/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-11-05/a-visual-study-of-wind-impact-on-pm25-concentration/cn/' class='faqlisttitle'><span>风对 PM <sub>2.5</sub>浓度影响的视觉研究</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>November 5<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-11-05/a-visual-study-of-wind-impact-on-pm25-concentration/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-11-05/a-visual-study-of-wind-impact-on-pm25-concentration/cn/"'> <div style='float:right;padding-left:20px;text-align:center;width:300px; max-width:50%;'> <img src="/images/forecast/dust-storm-nasa.png" style='max-width:100%;'> <br> <small> A perfect dust storm <small>(<a href='http://www.nasa.gov/multimedia/imagegallery/image_feature_989.html'>attribution</a>)</small> </small> </div> <p>我们已经写过好几次关于风对空气污染的影响，以及强风（或者更准确地说，强<a href='http://www.env.gov.bc.ca/epd/bcairquality/readings/ventilation-index.html'>通风</a>）如何有助于在很短的时间内净化空气。但我们从未有机会创建这种现象的动态可视化，所以这就是本文将要写的内容。</p> <br><center><a href='https://aqicn.org/faq/2015-11-05/a-visual-study-of-wind-impact-on-pm25-concentration/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div style='float:right;padding-left:20px;text-align:center;line-height:1.2;max-width:50%'><img src='/images/unep-monitoring-station/unep-aqms-logo.jpg' width=180px style='max-width:100%;'><br><div style='font-size:80%;margin:10px 0;'></div></div><div><a href='https://aqicn.org/faq/2015-10-28/unep-air-quality-monitoring-station/cn/' class='faqlisttitle'><span>环境署空气质量监测站</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>October 28<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-10-28/unep-air-quality-monitoring-station/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-10-28/unep-air-quality-monitoring-station/cn/"'> <p>近两个月以来，我们<a href='http://unep.org'>环境署</a>的同事一直在采取一项有趣的举措，以宣传空气质量与联合国内任何其他业务一样重要的理念。他们开始在这个领域进行投资，并提出了一个出色的举措，即为负担得起的空气质量监测站创建一个开放的足迹。</p> <br><center><a href='https://aqicn.org/faq/2015-10-28/unep-air-quality-monitoring-station/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-09-20/asean-air-quality-tile-map-service/cn/' class='faqlisttitle'><span>东盟空气质量瓷砖地图服务</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>September 20<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-09-20/asean-air-quality-tile-map-service/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-09-20/asean-air-quality-tile-map-service/cn/"'> <div style='float:right;padding-left:20px;text-align:center;line-height:1.2;'> <img src="/images/map-web-services/asean.png" width=180> </div> <p class='bigletter'>这是<a href='/home/cn/'>世界空气质量指数</a>项目在南亚雾霾严重期间向 ASMC - 东盟专业气象中心 ( <a href='http://asmc.asean.org/'>asmc.asean.org</a> ) 做出的小小的贡献。</p> <br><center><a href='https://aqicn.org/faq/2015-09-20/asean-air-quality-tile-map-service/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-09-18/map-web-service-real-time-air-quality-tile-api/cn/' class='faqlisttitle'><span>地图网络服务：实时空气质量图块 API</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>September 18<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-09-18/map-web-service-real-time-air-quality-tile-api/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-09-18/map-web-service-real-time-air-quality-tile-api/cn/"'> <div style='float:right;padding-left:20px;text-align:center;line-height:1.2;'> <img src="/images/map-web-services/map-overlay.png" width=200 width=200 > <br> <small> Map Overlay Process<br> <small><small>(Attribution: <a href='https://saylordotorg.github.io/text_essentials-of-geographic-information-systems/index.html'> Essentials of<br> Geographic Information Systems</a> )</small></small> </small> </div> <p>我们最近与世界各地更多的 EPA（环境保护机构）合作。在我们收到的所有请求中，实际上是提供网络地图服务，以便环保局自己可以将实时空气质量数据从其网站添加到地图上。</p> <p>使用我们提供的此类地图网络服务的明显优势之一是受益于我们正在整理的跨境数据，即提供不受国界限制的全球空气质量信息。</p> <p>第二个优势不仅在于这是一项免费服务，而且还与 google、bing 或 leaflet 的标准地图技术完全兼容，从而可以快速轻松地与任何现有网站集成。</p> <br><center><a href='https://aqicn.org/faq/2015-09-18/map-web-service-real-time-air-quality-tile-api/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-09-06/ozone-aqi-using-concentrations-in-milligrams-or-ppb/cn/' class='faqlisttitle'><span>臭氧 AQI：使用<i>毫克</i>或<i>ppb</i>浓度？</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>September 6<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-09-06/ozone-aqi-using-concentrations-in-milligrams-or-ppb/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-09-06/ozone-aqi-using-concentrations-in-milligrams-or-ppb/cn/"'> <p class="bigletter">环境<a href='https://en.wikipedia.org/wiki/Ozone'>臭氧</a>，称为 O <sub>3</sub> ，也称为地面或<a href='https://en.wikipedia.org/wiki/Troposphere'>对流层</a>臭氧，影响地球上的每个人，无论哪个国家，如右图所示。</p> <div style='margin-top:-30px;float:right;padding-left:20px;text-align:center;line-height:1.2;'> <div style='font-size:66%;margin-bottom:10px;'> Afternoon ground level Ozone concentration in July 2011 </div> <img src="/images/ozone-units/ground-level-ozone-concentration-july-2011.jpg" width=380> <br> <small> <small><small>(Attribution: <a href='http://www.wmo.int/pages/prog/arep/gaw/reactive_gases.html'> WMO GAW research on reactive gases</a> )</small></small> </small> </div> <p>与颗粒物 (PM <sub>2.5</sub> ) 不同，地面臭氧不直接排放。相反，它是通过在氮氧化物、挥发性有机化合物、阳光和高温存在下发生的一系列化学反应产生的，如下图所示：</p> <center> <img src="/images/ozone-units/ground-ozone-how-does-it-work.png" style='max-width:100%'> </center> <p>通过每个国家定义的空气质量指数标准来量化地面臭氧对健康的影响。有趣的是，世界上一半的国家使用基于毫克的测量标准，而其余的国家则使用基于 ppb 的测量标准。但这真的是个问题吗？这就是我们将在本文中讨论的内容。</p> <br><center><a href='https://aqicn.org/faq/2015-09-06/ozone-aqi-using-concentrations-in-milligrams-or-ppb/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-09-03/air-quality-scale-in-poland/cn/' class='faqlisttitle'><span>波兰的空气质量等级</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>September 3<sup>rd</sup> 2015</small><div><small>https://aqicn.org/faq/2015-09-03/air-quality-scale-in-poland/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-09-03/air-quality-scale-in-poland/cn/"'> <style> table.fancy { border: 2px solid black; border-spacing: 0px; background: white; } table.fancy td { margin: 0px; padding: 3px; text-align: center; border-bottom: solid 1px #DEDEDE; border-right: solid 1px #DEDEDE; font-size: 13px; } table.fancy tr:hover { background: #9AC9FF; } </style> <div style='float:right;padding-left:20px;text-align:center;'> <img src="/images/aqi-scales/wios.png" width=200> <br> <small> Inspekcja Ochrony Środowiska.<br> <small>(Inspection of Environmental Protection)</small> </small> </div> <p class="bigletter"><a href='/map/poland/cn/'>波兰</a>的空气质量数据已经提供了一段时间，但我们最近收到了一些关于<i>Inspekcja Ochrony Środowiska</i>使用的 AQI 等级（即环境保护的区域检查）的问题，以及它与世界空气使用的等级有何不同质量指标项目。其中一位来自 Sylwia，她问道：</p> <blockquote> <p>我对所有这些数字感到困惑，为什么与华沙环保局网站上显示的数字有差异。</p> <p>请您介绍一下华沙数据的来源以及您提供的数据的可靠性吗？</p> </blockquote> <p>这实际上是一个非常好的问题，因为当涉及到数据时，没有人应该将数据视为“理所当然”（参考<a href='https://www.math.hmc.edu/~twilliams/'>Talithia Williams</a>的精彩<a href='https://www.ted.com/talks/talithia_williams_own_your_body_s_data?language=en'>TED 演讲</a>“拥有你身体的数据”）。这也是世界空气质量指数项目存在的原因，即向大家解释如何理解空气污染背后的数字。</p> <br> <br><center><a href='https://aqicn.org/faq/2015-09-03/air-quality-scale-in-poland/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-07-28/air-quality-widget-new-improved-feed/cn/' class='faqlisttitle'><span>空气质量小部件 - 新改进的源</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>July 28<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-07-28/air-quality-widget-new-improved-feed/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-07-28/air-quality-widget-new-improved-feed/cn/"'> <div style='float:right;padding-left:10px;border:0px solid black;'> <center> <span style='color:#9b9b9b;font-family: arial, sans-serif;font-size:88px;'>{<span style="font-size:60px;font-family: Georgia, Times, 'Times New Roman', serif;color:black;margin-bottom:10px;"> widget <span style='color:#9b9b9b'>:</span> feed </span>}</span> <br> <br> </div> <p class='bigletter'>为了改善 AQI 小部件与外部网站的集成，我们开发了新的小部件 API 源。与现有的小部件提要相比，这个新的 API 提要为集成提供了更大的灵活性，而且还提供了更多用于自定义小部件外观的选项。</p> <center> <img src='/images/widget-feed/widget-feed-banner.png' style='max-width:100%'> </center> <br> <center><a href='https://aqicn.org/faq/2015-07-28/air-quality-widget-new-improved-feed/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-07-18/real-time-air-quality-monitoring-in-indonesia/cn/' class='faqlisttitle'><span>印度尼西亚实时空气质量监测</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>July 18<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-07-18/real-time-air-quality-monitoring-in-indonesia/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-07-18/real-time-air-quality-monitoring-in-indonesia/cn/"'> <div style='float:right;padding-left:20px;text-align:center;'>  <img src="/images/indonesia-philippines/id-aq-stations-map-1.380.jpg" width=320 height=320> <br> <small> </small> </div> <p class='bigletter'>印度尼西亚现已提供实时空气质量数据。位于印度尼西亚主要城市的 10 个监测站正在实时测量 PM <sub>10</sub>污染。</p> <p>这些监测站由印度尼西亚气象、气候和地球物理部<a href='http://bmkg.go.id'>BMKG</a> ( <i>Badan Meteorologi Klimatologi dan Geofisika</i> ) 运营。</p> <center><a href='https://aqicn.org/faq/2015-07-18/real-time-air-quality-monitoring-in-indonesia/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal/cn/' class='faqlisttitle'><span>魁北克省和蒙特利尔的空气质量等级</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>July 16<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal/cn/"'> <style> table.fancy { border: 2px solid black; border-spacing: 0px; background: white; } table.fancy td { margin: 0px; padding: 3px; text-align: center; border-bottom: solid 1px #DEDEDE; border-right: solid 1px #DEDEDE; font-size: 13px; } table.fancy tr:hover { background: #9AC9FF; } </style> <div style='float:right;padding-left:20px;text-align:center;'> <img alt="Flag of Quebec.svg" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Flag_of_Quebec.svg/225px-Flag_of_Quebec.svg.png" width="225" height="150" class="thumbborder" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Flag_of_Quebec.svg/338px-Flag_of_Quebec.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5f/Flag_of_Quebec.svg/450px-Flag_of_Quebec.svg.png 2x" data-file-width="600" data-file-height="400"> <br> <small> The <i>Fleurdelisé</i>, flag of Quebec.<br> (attribution: <a href='https://en.wikipedia.org/wiki/Flag_of_Quebec'>wikipedia</a>) </small> </div> <p class="bigletter"><a href='/city/montreal/cn/'>蒙特利尔</a>和<a href='/map/quebec/cn/'>魁北克</a>的空气质量数据已经提供了一段时间，但我们最近收到了一些关于加拿大该地区使用的 AQI 等级的问题。其中一封来自 Marie A.，她问道：</p> <blockquote> <p>我想知道为什么你们网站上的空气质量指数与蒙特利尔网站上的AQI不一样？您是否重新计算任何内容以满足 US EPA AQI 标准？如果是这样，怎么办？用什么数据？</p> </blockquote> <p>这确实是一个非常好的问题。我们将在本文中解释所使用的不同比例、这些比例如何相互比较以及如何进行转换。</p> <br><br> <center><a href='https://aqicn.org/faq/2015-07-16/air-quality-scale-in-quebec-and-montreal/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-07-01/translation-for-polish-is-now-available/cn/' class='faqlisttitle'><span>波兰语翻译现已推出</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>July 1<sup>st</sup> 2015</small><div><small>https://aqicn.org/faq/2015-07-01/translation-for-polish-is-now-available/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-07-01/translation-for-polish-is-now-available/cn/"'> <div style='float:right;padding-left:10px;'> <img border=1 alt="Flag of Poland.svg" src="//upload.wikimedia.org/wikipedia/en/thumb/1/12/Flag_of_Poland.svg/240px-Flag_of_Poland.svg.png" width="240" height="150" class="thumbborder" srcset="//upload.wikimedia.org/wikipedia/en/thumb/1/12/Flag_of_Poland.svg/360px-Flag_of_Poland.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/1/12/Flag_of_Poland.svg/480px-Flag_of_Poland.svg.png 2x" data-file-width="1280" data-file-height="800"> <br> <center> <small> Flag of the Republic of Poland <br> (attribution: <a href='https://en.wikipedia.org/wiki/Flag_of_Poland'>wikipedia</a>) </small> </center> </div> <p class='bigletter'>感谢<a href='/home/cn/'>世界空气质量指数</a>项目社区，网站和网络应用程序现已提供<a href='https://en.wikipedia.org/wiki/Polish_language'>波兰语</a>翻译。非常感谢用户“ <i>AiRs</i> ”做出的杰出贡献。</p> <center><a href='https://aqicn.org/faq/2015-07-01/translation-for-polish-is-now-available/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br> <div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-06-08/wind-and-air-pollution-forecast-in-quito/cn/' class='faqlisttitle'><span>基多的风和空气污染预报</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>June 8<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-06-08/wind-and-air-pollution-forecast-in-quito/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-06-08/wind-and-air-pollution-forecast-in-quito/cn/"'> <div style='float:right;padding-left:10px;border:0px solid black;'> <center> <img src='/images/wind-in-ecuador/guagua.jpg'> <br> <small> Guagua Pichincha volcano in Ecuador (<a href='http://naturegalapagos.blogspot.com/2013/11/ecuador-volcanoes.html'>Attribution</a>) </small> </center> </div> <p class='bigletter'>北京市民早就知道，净化空气污染的最佳自然方式是北风大风，而南风反而可能带来更多来自河北的污染。</p> <p>在厄瓜多尔<a href='http://www.quito.com.ec/en'>基多</a>，也存在类似的问题，只不过污染来自于<a href='http://en.wikipedia.org/wiki/List_of_volcanoes_in_Ecuador'>活火山</a>。幸运的是，它们喷发的频率并不高，但当它们喷发时，最好避免处于爆炸性喷发形成的厚重<a href='http://en.wikipedia.org/wiki/Volcanic_ash'>火山灰云</a>之下（见图）。</p> <center><a href='https://aqicn.org/faq/2015-06-08/wind-and-air-pollution-forecast-in-quito/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-06-03/overview-of-hong-kongs-air-quality-health-index/cn/' class='faqlisttitle'><span>香港的空气质量健康指数概览</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>June 3<sup>rd</sup> 2015</small><div><small>https://aqicn.org/faq/2015-06-03/overview-of-hong-kongs-air-quality-health-index/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-06-03/overview-of-hong-kongs-air-quality-health-index/cn/"'> <div style='float:right;padding-left:10px;'> <img src='/images/aqi-scales/AQHI-logo.png'> </div> <p class='bigletter'>香港环保署将空气质量指数标准从传统的<i>空气污染指数</i>更新为所谓的<i>空气质量<u>健康</u>指数</i>（AQHI）已经有很长一段时间了，但我们直到现在才得到更深入的了解。它，我们将在本文中进行。</p> <p>香港环保局实际上在解释空气质量健康指数的定义方面做得非常出色，人们可以从他们的<a href='http://www.aqhi.gov.hk/en/what-is-aqhi/faqs.html'>网站</a>上获得了解空气质量健康指数所需的信息。最明显的简化就是将传统的0-500指数改为新的简化的0-10 <sup>+</sup>范围，细分为5个健康风险类别，如下图：</p> <center> <style type="text/css"> @media only screen and (max-width: 920px) { .aqih-scale-table { font-size: 10px; } } </style> <table class='aqih-scale-table'> <tr style='text-align:center;'> <td colspan=3>LOW <td colspan=3>MODERATE <td colspan=1>HIGH <td colspan=3>VERY HIGH <td colspan=1>SERIOUS <tr> <td colspan=3 width=20%> <div style='background-color:#4db748;width:100%;height:10px;'> <td colspan=3 width=20%> <div style='background-color:#f9a61a;width:100%;height:10px;'> <td colspan=1 width=20%> <div style='background-color:#ed1b24;width:100%;height:10px;'> <td colspan=3 width=20%> <div style='background-color:#a04623;width:100%;height:10px;'> <td colspan=1 width=20%> <div style='background-color:#000000;width:100%;height:10px;'> <tr style='text-align:center;'> <td>1 <td>2 <td>3 <td>4 <td>5 <td>6 <td>7 <td>8 <td>9 <td>10 <td>10+ </table> </center> <p>但实际上不仅仅是范围简化：新的 AQHI 还引入了非常巧妙的“增加健康风险” <i>(%AR)</i>概念，该概念最初由来自南非的四位合作伙伴组成的团队于 2007 年<a href='http://www.ehrn.co.za/publications/download/04.pdf'>定义</a>，并且首先在<a href='http://www.publichealthontario.ca/en/eRepository/Air_Quality_Indeces_Report_2013.pdf'>加拿大</a>使用。</p> <br> <center><a href='https://aqicn.org/faq/2015-06-03/overview-of-hong-kongs-air-quality-health-index/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-05-30/air-quality-forecast-in-south-america/cn/' class='faqlisttitle'><span>空氣質量預報在南美</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>May 30<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-05-30/air-quality-forecast-in-south-america/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-05-30/air-quality-forecast-in-south-america/cn/"'> <p>南美洲的空气质量预测现已在<a href='/home/cn//'>世界空气质量指数项目</a>中提供，该项目与巴西<i>气候预测中心 ( <a href='http://www.cptec.inpe.br/home/in'>CPTEC</a> )</i>合作。可以从<a href='http://meioambiente.cptec.inpe.br'>cptec.inpe.br</a>以及<a href='/forecast/south-america/cn/'>Forecast/ South-america/</a>免费访问该预报。</p> <p> The CPTEC team has done an excellent work at providing a simple and detailed <a href='http://meioambiente.cptec.inpe.br/modelo_cattbrams.php?lang=en'>explanation</a> on the underlying concepts used by their forecast model, called <a href='http://brams.cptec.inpe.br/'>BRAMS</a> (for <i> Brazilian developments on the Regional Atmospheric Modelling System</i>). The picture below (from the CPTEC) is giving an insight on the workflow for their model (source -> transport -> deposition). </p> <br> <center> <img src='/images/forecast/catt_brams_3d_model_grid_box.jpg' style='width:500px;max-width:90%'> </center> <br> <br> <center><a href='https://aqicn.org/faq/2015-05-30/air-quality-forecast-in-south-america/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast/cn/' class='faqlisttitle'><span>与Instant Cast地面臭氧AQI更新</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>May 18<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast/cn/"'> <div style='float:right;padding-left:10px;border:0px solid black;'> <center> <img src="/images/ozone-units/good-and-bad-ozone.png" width=450> <br> <small> <small><small>(Attribution: <a href='http://houstoncleanairnetwork.com/what-is-ozone'> Houston Clean Air Network</a> )</small></small> </small> </center> </div> <p class='bigletter'>地面臭氧空气质量指数计算刚刚更新，以遵循即时投射概念，即报告现在的污染，而不是前几个小时的污染。有关 Instant Cast 的更多信息，请参阅这篇<a href='/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/cn/'>文章</a>。</p> <p>臭氧指数的计算现在使用每小时读数，而不是之前的 8 小时平均值，但对于 AQI 低于 100 的情况，仍采用相同的 8 小时 AQI 断点公式。不使用之前计算 8 小时平均浓度<a href='http://www.arb.ca.gov/regact/area06/appe.pdf'>的程序</a>更多即时报告。 AQI 高于 100，则使用正常的 1 小时臭氧断点（而在此之前，AQI 高于 100 被定义为 1 小时和 8 小时读数的最大值）。</p> <br> <br><center><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-05-16/world-health-organization-2014-air-pollution-ranking/cn/' class='faqlisttitle'><span>世界卫生组织：2014年空气污染排名</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>May 16<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-05-16/world-health-organization-2014-air-pollution-ranking/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-05-16/world-health-organization-2014-air-pollution-ranking/cn/"'> <div style='float:right;padding-left:10px;border:0px solid black;' > <center> <img src='/air/view/faq/images/unep/who-150x150.png' title='World Health Organization'> </center> </div> <p class='bigletter'>世界卫生组织发布《2014年<a href='http://www.who.int/phe/health_topics/outdoorair/databases/cities/en/'>城市环境（室外）空气污染</a>数据库》已经一年多了。参与该项目的世卫组织团队在收集如此多国家的数据方面做得非常出色，并将所有数据集中在一个可供所有人访问的地方。</p> <p>我们在过去的几篇文章中对此进行了介绍（例如<a href='/faq/2015-04-08/air-quality-in-africa-and-middle-east/cn/'>非洲</a>或<a href='/faq/2015-05-10/a-comparison-of-latin-american-air-quality-scales/cn/'>拉丁美洲</a>的空气质量），但我们从未有机会查看不同的选项来可视化其数据集。因此，这就是我们将在本文中讨论的内容。</p> <center><a href='https://aqicn.org/faq/2015-05-16/world-health-organization-2014-air-pollution-ranking/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br> <div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-05-15/india-national-air-quality-index/cn/' class='faqlisttitle'><span>印度国家空气质量指数概览</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>May 15<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-05-15/india-national-air-quality-index/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-05-15/india-national-air-quality-index/cn/"'> <div style='float:right;padding-left:10px;border:0px solid black;'> <center> <small> <div class='img-thumbnail flag flag-icon-background flag-icon-in' style='width:250px;height:150px;'></div> Flag of India<br><small>(Tiranga, तिरंगा)</small> </small> </div> <link rel='stylesheet' href='/images/flags.css/css/flag-icon.min.css' /> <p class='bigletter'>印度中央污染控制委员会最近宣布于 2015 年 4 月发布印度国家空气质量指数标准 ( <i>NAQI</i> )。有关该标准的所有详细信息均可从<a href='http://www.cpcb.nic.in/AQI_new.php'>CPCB</a> 、<a href='http://en.wikipedia.org/wiki/Air_quality_index#India'>维基百科</a>或坎普尔印度理工学院 ( <a href='http://iitk.ac.in'>iitk.ac.in</a> ) 的这份<a href='/images/aqi-scales/india-national-air-quality-standard.pdf'>报告</a>中获得。</p> <p>这实际上是空气质量世界意识向前迈出的非常重要的一步，因为每个国家的空气污染都因其国家污染类型而异：例如，由于灰尘（阿拉伯半岛），由于交通（新德里）或地形（智利）。</p> <center><a href='https://aqicn.org/faq/2015-05-15/india-national-air-quality-index/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-05-10/a-comparison-of-latin-american-air-quality-scales/cn/' class='faqlisttitle'><span>拉丁美洲空气质量等级比较</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>May 10<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-05-10/a-comparison-of-latin-american-air-quality-scales/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-05-10/a-comparison-of-latin-american-air-quality-scales/cn/"'> <link rel='stylesheet' href='/air-static/view/images/flags.css/css/flag-icon.min.css' /> <div style='float:right;padding-left:10px;'> <img src='/air-static/view/faq/images/aqi-scales/oms-latin-america.png'> </div> <p class='bigletter'>就像世界上任何其他大陆一样，拉丁美洲也面临着空气污染问题。<a href='http://www.who.int/phe/health_topics/outdoorair/databases/cities/en/'>世界卫生组织</a>最近发布的 2014 年环境（室外）空气污染报告给出了拉丁美洲几个城市的一些年度平均数据。毫不奇怪，最糟糕的情况发生在亚洲，但拉丁美洲的一些城市也有很高的指数（见左表）。</p> <p>然而，世界卫生组织的排名应该仔细考虑，特别是考虑到报告中使用的测量方法可能存在争议——例如，对于利马，秘鲁环保局认为世界卫生组织的数据不正确，因为样本不是在利马采集的。正确的地方（阅读<a href='https://ksj.mit.edu/tracker/2014/05/who-releases-database-about-air-pollutio/'>P. Estupinya</a>的这篇文章，了解来自多个国家的完整反馈）。实际上，出于这个原因，我们只发布有关<a href='/home/cn/'>世界空气质量项目的</a>实时信息，因为我们确实相信，除了排名之外，当前的状况对世界公民来说也很重要。</p> <br><br> <center><a href='https://aqicn.org/faq/2015-05-10/a-comparison-of-latin-american-air-quality-scales/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-05-02/south-asian-air-quality-scales-malaysia-and-thailand/cn/' class='faqlisttitle'><span>南亚空气质量等级：马来西亚和泰国</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>May 2<sup>nd</sup> 2015</small><div><small>https://aqicn.org/faq/2015-05-02/south-asian-air-quality-scales-malaysia-and-thailand/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-05-02/south-asian-air-quality-scales-malaysia-and-thailand/cn/"'> <link rel='stylesheet' href='/images/flags.css/css/flag-icon.min.css' /> <div style='float:right;padding-left:10px;'> <center> <small> <div class='img-thumbnail flag flag-icon-background flag-icon-my' style='width:250px;height:150px;'></div> Flag of Malaysia<br><small>(Jalur Gemilang)</small> </small> </div> <p class='bigletter'>马来西亚的空气质量已经提供很长时间了，但与其他国家不同的是，只提供综合 AQI。 PM <sub>10</sub> 、臭氧等个别污染物的 AQI 无法获得，这使得转换为 US EPA 等级变得更加困难。</p> <p>幸运的是，有关马来西亚使用的 AQI 等级（也称为 API（空气污染物指数））的信息在《<a href='/images/aqi-scales/malaysia-api-guide.pdf'>马来西亚空气污染物指数指南</a>》文件中有清楚的解释。</p> <br> <br> <center><a href='https://aqicn.org/faq/2015-05-02/south-asian-air-quality-scales-malaysia-and-thailand/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-04-28/real-time-air-quality-in-the-balkan-peninsula/cn/' class='faqlisttitle'><span>巴尔干半岛实时空气质量</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>April 28<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-04-28/real-time-air-quality-in-the-balkan-peninsula/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-04-28/real-time-air-quality-in-the-balkan-peninsula/cn/"'><link rel='stylesheet' href='/images/flags.css/css/flag-icon.min.css' /> <a href='https://aqicn.org/faq/2015-04-28/real-time-air-quality-in-the-balkan-peninsula/cn/'> <div style='float:right;padding-left:10px;margin-left:10px;'> <img width="300" alt="Balkan peninsula line" src="//upload.wikimedia.org/wikipedia/commons/c/cf/Balkan_peninsula_line.jpg" /> </a> </div> <p>巴尔干半岛，俗称巴尔干半岛，是东南欧的一个地理区域。该地区得名于巴尔干山脉，从塞尔维亚东部一直延伸到保加利亚东部的黑海。</p> <p>巴尔干地区的许多国家都提供实时空气质量读数。<a href='/map/turkey/cn/'>土耳其</a>（色雷斯）、<a href='/map/romania/cn/'>罗马尼亚</a>和<a href='/map/croatia/cn/'>克罗地亚</a>的数据早已在世界空气质量指数项目中提供。今天，我们能够推出 3 个新国家的数据：<a href='/map/serbia/cn/'>塞尔维亚</a>、<a href='/map/bulgaria/cn/'>保加利亚</a>和<a href='/map/macedonia/cn/'>马其顿</a>。</p> <br> <br> <center><a href='https://aqicn.org/faq/2015-04-28/real-time-air-quality-in-the-balkan-peninsula/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-04-26/nasa-earth-observations-and-tools-for-air-quality-applications/cn/' class='faqlisttitle'><span>NASA - 空气质量应用的地球观测和工具</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>April 26<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-04-26/nasa-earth-observations-and-tools-for-air-quality-applications/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-04-26/nasa-earth-observations-and-tools-for-air-quality-applications/cn/"'> <div style='float:right;padding-left:10px;margin-left:10px;max-width: 50%;width:300px;' > <a href='https://aqicn.org/faq/2015-04-26/nasa-earth-observations-and-tools-for-air-quality-applications/cn/'> <img width="250" style='max-width: 100%;' alt="The Earth seen from Apollo 17 with transparent background" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/43/The_Earth_seen_from_Apollo_17_with_transparent_background.png/512px-The_Earth_seen_from_Apollo_17_with_transparent_background.png"/> </a> </div> <p class='bigletter'>我们很荣幸受到 NASA 应用遥感培训 ( <a href='http://arset.gsfc.nasa.gov/'>ARSET</a> ) 团队的<a href='http://science.gsfc.nasa.gov/sed/index.cfm?fuseAction=people.jumpBio&iphonebookid=27549'>Pawan Gupta 博士</a>的邀请，在地球观测和空气质量应用工具网络研讨会上介绍我们的<a href='/home/cn/'>世界空气质量指数</a>项目：</p> <br><center><a href='https://aqicn.org/faq/2015-04-26/nasa-earth-observations-and-tools-for-air-quality-applications/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-04-08/air-quality-in-africa-and-middle-east/cn/' class='faqlisttitle'><span>非洲和中东的空气质量</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>April 8<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-04-08/air-quality-in-africa-and-middle-east/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-04-08/air-quality-in-africa-and-middle-east/cn/"'> <style type="text/css"> .calculatornoteref { background-color: orange; color: white; border: 1px solid #888; min-width: 12px; text-align: center; font-size: 10px; display: inline-block; border-radius: 5px; -moz-border-radius: 5px; -webkit-border-radius: 5px; -box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); -moz-box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); -webkit-box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); } .aqisnapshot { -box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); -moz-box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); -webkit-box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); margin: 3px; } </style> <div style='float:right;padding-left:10px;border:0px solid black;max-width: 50%;width:330px;'> <center> <img src='/air/view/faq/images/unep/african_union_flag.png' style='width: 100%;'> <br> <br> <a href='http://en.wikipedia.org/wiki/Flag_of_the_African_Union'>Flag of the African Union</a> </center> </a> </small> </div> <p>当谈到空气质量时，人们首先想到的国家是中国和印度，更普遍的是亚洲。即使在<a href='/home/cn/'>世界空气质量指数项目</a>中，亚洲从一开始就一直是我们的重点关注对象（很可能是因为这里是我们的总部所在地！）。</p> <p>几年前，也就是2012年，我们决定将业务范围扩大到其他<a href='http://www.nationsonline.org/oneworld/continents.htm'>七大洲</a>，首先是<a href='/map/australia/cn/'>大洋洲</a>，然后是<a href='/map/australia/cn/'>欧洲</a>以及<a href='/map/northamericas/cn/'>北美</a>、<a href='/map/southamericas/cn/'>南美</a>。</p> <p>但七大洲之一的<i>非洲</i>却出奇地落后。我们收到了许多关于数据缺乏的询问，最后一个询问来自 Said E.，他写道：</p> <blockquote> <p>感谢您创建世界空气质量指数项目网站。它提供了非常有用的信息。<br>我唯一担心的是为什么不考虑<b>非洲</b>。<br>仅供参考，我是摩洛哥公民。<br></p> </blockquote> <br><center><a href='https://aqicn.org/faq/2015-04-08/air-quality-in-africa-and-middle-east/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-03-23/air-quality-forecasting-how-accurate-can-it-be/cn/' class='faqlisttitle'><span>空气质量预报 - 准确度如何？</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>March 23<sup>rd</sup> 2015</small><div><small>https://aqicn.org/faq/2015-03-23/air-quality-forecasting-how-accurate-can-it-be/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-03-23/air-quality-forecasting-how-accurate-can-it-be/cn/"'> <style type="text/css"> .forecastgraphin { padding: 5px; margin-bottom: 5px; border: 1px solid #aaa; background-color: #eeeeee; -box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); -moz-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); } .forecastgraph { font-size: 15px; display: inline-block; width: 100%; padding: 0px; text-align: left; color: #888888; margin-left: 10px; margin-right: 10px; } .graphtitle { text-shadow: 1px 1px 0 white; font-size: 18px; min-width: 300px; margin: 0px; height: 8px; color: black; border-bottom: 0px solid black; } .forecast-country { font-size: 28px; height: 40px; } .hline { stroke-width: .3; stroke: #ffffff; } .hmline { shape-rendering: crispEdges; stroke-width: 1px; stroke: #cccccc; } .vline { stroke: #cccccc; shape-rendering: crispEdges; stroke-width: 1px; xstroke-dasharray: 2, 3; } .vlinetext { font-size: 10px; } .rect { stroke: #ffffff; stroke-width: 1; } .hlinetext { background-color: yellow; font-size: 10px; } #forecastdiv {} .aqiv { border: 1px solid #888; background-color: white; border-radius: 2px; -moz-border-radius: 2px; -webkit-border-radius: 2px; -box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); -moz-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2); } .axis path, .axis line { fill: none; stroke: #ccc; stroke-width: 1px; shape-rendering: crispEdges; } .axis text {} button { background-color: #4ebb44; border: none; font-family: "dropplets"; color: #ffffff; text-align: center; width: 70px; font-size: 20px; padding: 5px; cursor: pointer; -moz-transition-duration: 0.1s; -webkit-transition-duration: 0.1s; } button:hover { box-shadow: inset 0 0 20px rgba(54, 124, 49, 0.75); text-shadow: 0 0 10px rgba(54, 124, 49, 0.75); } </style> <div style='float:right;padding-left:10px;border:0px solid black;border-left:1px dashed #ccc;margin-left:10px;max-width: 50%;width:380px;'> <div style='color:#888;font-size:12px;line-height:1.5;text-align: center;'> <img src='/images/forecast/wind-looping.jpg' style='width:100%' title='Atmospheric Stability - STRONG LAPSE CONDITION (LOOPING)'> <br> STRONG LAPSE CONDITION (LOOPING) <br> <img src='/images/forecast/wind-coning.jpg' style='width:100%' title='Atmospheric Stability - WEAK LAPSE CONDITION (CONING)'> <br> WEAK LAPSE CONDITION (CONING) <br> <img src='/images/forecast/wind-fanning.jpg' style='width:100%' title='Atmospheric Stability - INVERSION CONDITION (FANNING)'> <br> INVERSION CONDITION (FANNING) <br> <br> Examples of Atmospheric Stability (<a href='https://courses.ecampus.oregonstate.edu/ne581/eleven/'>attribution</a>) </div> </div> <p>在天气预报中，预测模型用于根据气候系统从初始状态随时间的变化情况来预测大气的未来状态。</p> <p>虽然预测模型相当<a href='http://en.wikipedia.org/wiki/Meteorological_reanalysis'>复杂</a>（并且<i>确实</i>需要强大的科学和工程能力），但通过将实际经验观察结果与预测值进行比较来分析这些预测模型并验证其<a href='http://en.wikipedia.org/wiki/Forecasting#Forecasting_accuracy'>准确性</a>的科学却非常简单。</p>  <p>对于空气质量领域，就像天气预报一样，可以定义用于预测未来大气污染的模型。实际上有<a href='http://pandora.meng.auth.gr/mds/strquery.php?wholedb'>很多这样的模型</a>，通常称为<a href='http://en.wikipedia.org/wiki/Atmospheric_dispersion_modeling'>大气扩散模型</a>。就像天气预报一样，同样的精度分析概念也可以应用于大气污染预测。</p> <br><center><a href='https://aqicn.org/faq/2015-03-23/air-quality-forecasting-how-accurate-can-it-be/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/cn/' class='faqlisttitle'><span>全球空气质量等级比较 - 第 1 部分</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>March 20<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/cn/"'> <style type="text/css"> .calculatornoteref { background-color: orange; color: white; border: 1px solid #888; min-width: 12px; text-align: center; font-size: 10px; display: inline-block; border-radius: 5px; -moz-border-radius: 5px; -webkit-border-radius: 5px; -box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); -moz-box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); -webkit-box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); } .aqisnapshot { -box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); -moz-box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); -webkit-box-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5); margin: 3px; } </style> <div style='float:right;padding-left:10px;border:0px solid black;'> <center> <a href='http://who.int' target=_who> <img src='/images/aqi-scales/who-logo.jpg' width=250 title='World Health Organization'> <br> <span style='font-size:12px;color:#888;'>World Health Organization</span><br><br></center> </a> </small> </div> <p>我们经常收到用户询问<a href='/home/cn/'>世界空气质量指数项目</a>上发布的数字，并想知道与其他网站上表达的值的差异。这实际上很正常，因为这些数字，也称为空气质量指数 (AQI)，可能会让初学者感到非常困惑。我们收到的最后一条消息如下：</p> <blockquote> <p>自去年以来，我们一直在检查中国天津的空气质量指数，但我们发现你们网站的数据与你们网站上公布的另一个官方网站（air.tjemc.org.cn）的数据有很大差异。我想知道哪一个可以提供更准确的数据，因为这会影响室外还是室内的决定。请帮我解决这个问题。谢谢你！</p> </blockquote> <p>我们之前已经写过很多关于这个问题的文章，例如上海、<a href='/faq/2013-06-25/singapore-psi-and-pm25-aqi-why-is-there-a-difference-between-the-two-readings/cn/'><i>新加坡 PSI 和 PM <sub>2.5</sub> AQI</i></a><a href='/faq/2013-01-19/shanghai-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shanghai/cn/'><i>的 PM <sub>2.5</sub>比较数据</i></a>，以及最近的临近<a href='/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/cn/'><i>预报</i></a>。</p> <p>但是，由于我们仍然收到很多问题，我们现在撰写这篇文章来解释世界各地使用的 AQI 量表的差异。</p> <br> <br> <center><a href='https://aqicn.org/faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/cn/' class='faqlisttitle'><span>空气质量即时投射和立即投射的初学者指南。</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>March 15<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/cn/"'> <div style='float:right;padding-left:10px;'> <img src='/images/nowcast/typhoon-asia-2004293.jpg' width=280> <br> </div> <p>早在 2015 年 3 月，我们就有机会在北京会见了来自美国国务院以及中国代表团（<i>在北京美国大使馆运行 PM <sub>2.5</sub>监测器的著名实体</i>）的几位环境专家。</p> <p>在所有讨论的主题中，有一个值得一写，即“<i><b>即时广播</b></i>”系统。美国 EPA 使用该系统将原始污染物读数（以 µg/m3 或<i>ppb</i>表示）转换为 AQI（范围从 0 到 500）。它用于<a href='http://airnow.gov'>airnow.gov</a>网站上报告的所有 AQI 值。</p> <p>临近<i>预报</i>背后的概念是补偿“ <i>24 小时平均值</i>”，在将浓度转换为 AQI 时应使用该平均值。进行此平均的原因是， <a href='http://airnow.gov/index.cfm?action=aqibasics.aqi'>AQI 量表</a>指定每个健康问题级别（即良好、中等、...不健康...）在 24 小时暴露条件下有效<sup><a href="#nowcast-footnote-1">[1]</a></sup> 。例如，当看到188 AQI（不健康）时，需要将其解读为“<i style='color:#888;'>如果我在外面呆了24小时，并且<span style='color:#cc0033;'>这24小时内</span>AQI为188，那么对健康的影响就是不健康</i>”。这与“<i style='color:#888;'>如果现在报告的AQI是188，那么对健康的影响就是不健康</i>”的说法有很大不同。</p> <center><a href='https://aqicn.org/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-02-23/south-asia-real-time-air-quality-monitoring-project/cn/' class='faqlisttitle'><span>南亚实时空气质量监测项目</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>February 23<sup>rd</sup> 2015</small><div><small>https://aqicn.org/faq/2015-02-23/south-asia-real-time-air-quality-monitoring-project/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-02-23/south-asia-real-time-air-quality-monitoring-project/cn/"'> <div style='float:right;padding-left:10px;margin-bottom:20px;'> <img src='/images/manilla/goat-chunjie-2015.jpg'> <br> </div> <p>我们刚刚踏入农历羊年（结合 2015 年的<i>木</i>元素），对于世界空气质量指数项目团队来说，这意味着全速致力于将空气质量监测扩展到东南部新国家亚洲。即：<a href='/country/philippines/cn/'><b>菲律宾</b></a>、<a href='/country/cambodia/cn/'><b>柬埔寨</b></a>和<a href='/country/indonesia/cn/'><b>印度尼西亚</b></a>（以及更多国家，例如缅甸和老挝，很快就会跟进）。</p> <p> As there is also a huge demand for PM<sub>2.5</sub> monitoring for <a href='/country/thailand/'><b>Thailand</b></a> (especially Chiang Mai and Bangkok), or for more station in <a href='/map/vietnam/'><b>Vietnam</b></a> (Ho Chi Minh City), the extension will also cover selected countries with existing network. </p> <p>但是，这一次，与之前的国家不同，我们确实需要每个人的帮助，特别是如果您居住在这些国家之一，请提供<b>您的帮助</b>。原因是，这一次，由于这些国家的环境保护机构（EPA）尚未公开实时空气质量信息，世界空气质量指数项目将开始众包主要城市的空气质量监测站上述国家<sup><a href="#notes" id="ref1">1</a></sup> .</p> <img src='/images/manilla/manilla-jakarta-skyline.jpg' width=100%><br> <i><small>Visible Air Pollution on the Manilla and Jakarta Skylines</small></i> <br><center><a href='https://aqicn.org/faq/2015-02-23/south-asia-real-time-air-quality-monitoring-project/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2015-02-15/satellite-air-quality-monitoring-introduction-to-the-nasa-worldview/cn/' class='faqlisttitle'><span>卫星空气质量监测：NASA WorldView 简介</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>February 15<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-02-15/satellite-air-quality-monitoring-introduction-to-the-nasa-worldview/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-02-15/satellite-air-quality-monitoring-introduction-to-the-nasa-worldview/cn/"'> <p>我们最近有幸与<a href='http://arset.gsfc.nasa.gov'>NASA 遥感监测项目</a>开始合作。</p> <p>目标是使用基于 NASA 卫星的远程空气质量传感来确定传感器不可用的区域的空气质量（例如海上，以及尚不可用传感器的国家/地区）。</p> <br> <br> <center><a href='https://aqicn.org/faq/2015-02-15/satellite-air-quality-monitoring-introduction-to-the-nasa-worldview/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br> <center> <a href='https://aqicn.org/faq/2015-02-15/satellite-air-quality-monitoring-introduction-to-the-nasa-worldview/cn/'> <img src='/images/nasa-earthview/earthview-asia-hotspots-2015.01.14.small.jpg' width=100%> </a> <br> <br> <a href='https://aqicn.org/faq/2015-02-15/satellite-air-quality-monitoring-introduction-to-the-nasa-worldview/cn/'> <img src='/images/nasa-earthview/earthview-asia-aod-panel-2015.01.25-small.jpg' width=100%> </a> <br> </center> <div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2015-02-08/visual-recognising-the-air-quality-index-a-case-applied-to-hanoi/cn/' class='faqlisttitle'><span>视觉识别空气质量指数——以河内为例</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>February 8<sup>th</sup> 2015</small><div><small>https://aqicn.org/faq/2015-02-08/visual-recognising-the-air-quality-index-a-case-applied-to-hanoi/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2015-02-08/visual-recognising-the-air-quality-index-a-case-applied-to-hanoi/cn/"'> <p>本周早些时候（2015 年 2 月），我们收到河内市民的一些询问，想了解河内页面（<a href='/city/vietnam/hanoi/'>城市/越南/河内</a>）上显示的空气质量指数。</p> <p>询问的主要原因是世界空气质量指数项目上显示的空气质量指数约为50（绿色AQI）水平，而河内的室外能见度是这样的：</p> <center> <img src='/images/hanoi-aqi/Hanoi.10Feb.13.30-small.jpg' width=100%> </center> <br> <center><a href='https://aqicn.org/faq/2015-02-08/visual-recognising-the-air-quality-index-a-case-applied-to-hanoi/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2014-10-28/android-app-update-now-with-embedded-map-and-wind-forecast/cn/' class='faqlisttitle'><span>新安卓应用来了</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>October 28<sup>th</sup> 2014</small><div><small>https://aqicn.org/faq/2014-10-28/android-app-update-now-with-embedded-map-and-wind-forecast/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2014-10-28/android-app-update-now-with-embedded-map-and-wind-forecast/cn/"'><style type="text/css"> img.androidthumbnail3 { width:150px; height:280px; border:1px solid #888; padding:1px; } .thumbnailcrop3 { height: 270px; overflow: hidden; display: inline-block; margin:5px; border-bottom:1px solid #888; xfont-style:italic; color:#888; } .picletsharing { -box-shadow: 1px 1px 2px rgba(0,0,0,0.5); -moz-box-shadow: 1px 1px 2px rgba(0,0,0,0.5); -webkit-box-shadow: 1px 1px 2px rgba(0,0,0,0.5); margin:3px; } </style> 最新版本(3.2)的空气质量安卓版应用已经上市了，并添加了新的功能:可浏览地图的嵌入使用户可以通过应用中世界空气监测站直接浏览。显示近三天的风象及天气预报。通过更新设置改进用户界面，比如：增加华式温度的显示。 <br> <br> <center> <small> 你可以从<a href='https://play.google.com/store/apps/details?id=com.insdio.aqicn.airwidget.Asia' target=_googlestore>Google商店</a> 下载此应用。如果不能访问Google应用商店，你也可以从我们的网站上直接下载 <a href='/?apk'>APK文件</a>. <br> </small> </center> <br> <br> <center> <div class='thumbnailcrop3'>监测站地图: 亚洲<br><img src='/air//view/faq/images/app-3.2/small/map0.en.png' class='androidthumbnail3'></div><div class='thumbnailcrop3'>监测站地图: 北中国<br><img src='/air//view/faq/images/app-3.2/small/map1.en.png' class='androidthumbnail3'></div><div class='thumbnailcrop3'>监测站地图: 北京<br><img src='/air//view/faq/images/app-3.2/small/map2.cn.png' class='androidthumbnail3'></div><div class='thumbnailcrop3'>监测站地图: 汉城<br><img src='/air//view/faq/images/app-3.2/small/map3.en.png' class='androidthumbnail3'></div><div class='thumbnailcrop3'>风和气温预报<br><img src='/air//view/faq/images/app-3.2/small/forecast.cn.png' class='androidthumbnail3'></div><div class='thumbnailcrop3'>应用增强型设置<br><img src='/air//view/faq/images/app-3.2/small/settings.cn.png' class='androidthumbnail3'></div><br><div class='thumbnailcrop3'>污染图<br><img src='/air//view/faq/images/app-3.2/small/graph.cn.png' class='androidthumbnail3'></div><div class='thumbnailcrop3'>主屏幕小部件<br><img src='/air//view/faq/images/app-3.2/small/home.cn.png' class='androidthumbnail3'></div><div class='thumbnailcrop3'>警报通知<br><img src='/air//view/faq/images/app-3.2/small/notification.en.png' class='androidthumbnail3'></div><div class='thumbnailcrop3'>最近的监测站<br><img src='/air//view/faq/images/app-3.2/small/nearest.cn.png' class='androidthumbnail3'></div><div class='thumbnailcrop3'>空气质量指数标准<br><img src='/air//view/faq/images/app-3.2/small/levels.cn.png' class='androidthumbnail3'></div></center> <br> <br><center><a href='https://aqicn.org/faq/2014-10-28/android-app-update-now-with-embedded-map-and-wind-forecast/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2014-10-06/clean-air-initiative-and-the-better-air-quality-conference-2014/cn/' class='faqlisttitle'><span>清洁空气倡议和 2014 年更好空气质量会议</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>October 6<sup>th</sup> 2014</small><div><small>https://aqicn.org/faq/2014-10-06/clean-air-initiative-and-the-better-air-quality-conference-2014/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2014-10-06/clean-air-initiative-and-the-better-air-quality-conference-2014/cn/"'> <p>与 2002 年以来的每一年一样，我们来自<a href='http://cleanairasia.org/' target="_blank">亚洲清洁空气</a>（又名清洁空气倡议）的同事正在组织两年一度<a href='http://baq2014est.org/'>的更好质量会议</a>( <a href='http://baq2014est.org/' target="_blank">baq2014est.org</a> )。此次，它将于2014年11月19日至21日在斯里兰卡举行，并将与<i>环境可持续交通</i>（EST）论坛共同主办。</p> <div style='float:right;padding-left:20px;text-align:center;margin-top:-38px;'> <img src='/images/baq-2014-logo.png' > </div> <blockquote style='color:#444'> The "Integrated Conference of BAQ 2014 and Intergovernmental 8th Regional EST Forum in Asia"  co-organized by the <a href="http://www.transport.gov.lk/web/index.php?lang=en">Ministry of Transport of Sri Lanka</a>, <a href="http://www.environmentmin.gov.lk/web/">The Ministry of Environment and Renewable Energy of Sri Lanka</a>, <a href="http://www.env.go.jp/en/" target="_blank">Ministry of the Environment of Japan</a>, <a href="http://www.uncrd.or.jp/" target="_blank">United Nations Centre for Regional Development</a>, and <a href="http://www.cleanairasia.org" target="_blank">Clean Air Asia</a>, in partnership with the <a href="http://www.adb.org/" target="_blank">Asian Development Bank</a>, <a href="http://www.giz.de/en/" target="_blank">German International Cooperation (GIZ)</a>, and <a href="http://www.worldbank.org/" target="_blank">World Bank</a>. </blockquote> <p>今年的主题是“清洁空气和可持续交通的下一代解决方案——迈向亚洲宜居社会”：</p> <blockquote style='color:#444'> <p>认识到清洁空气和可持续交通对于亚洲宜居社会至关重要，我们呼吁采取创新和<b>明智的解决方案（政策、制度、技术和融资）</b> ，以显着减少能源、工业、交通和地区来源的空气污染和温室气体，并通过加速亚洲城市和国家向环境可持续交通（EST）的转变，确保安全、公平、环境和人性化的交通系统。</p> </blockquote> <p>查看该<a href='http://www.baq2014est.org/program.html' target="_blank">程序</a>。预计将有超过 800 名参与者参加 2014 年 BAQ，我们将成为其中的一员，展示我们最近在我们的<a href='/research'>研究实验室</a>中进行的有关<a href='/images/baq2014/aqicn-affordable_aqi_sensors-baq2014.pdf'>经济实惠的空气质量监测解决方案的</a>研究。</p> <div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2014-09-06/australian-air-quality-comparison-with-the-us-epa-aqi-scale/cn/' class='faqlisttitle'><span>澳大利亚空气质量：与美国 EPA AQI 等级比较。</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>September 6<sup>th</sup> 2014</small><div><small>https://aqicn.org/faq/2014-09-06/australian-air-quality-comparison-with-the-us-epa-aqi-scale/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2014-09-06/australian-air-quality-comparison-with-the-us-epa-aqi-scale/cn/"'> <style> table.fancy { border: 2px solid black; border-spacing: 0px; background: white; } table.fancy td { margin: 0px; padding: 3px; text-align: center; border-bottom: solid 1px #DEDEDE; border-right: solid 1px #DEDEDE; font-size: 13px; } table.fancy tr:hover { background: #9AC9FF; } </style> <div style='float:right;padding-left:20px;text-align:center;'> <img src='/air/view/experiments/images/aqi.png' width=200> </div> <p>经过漫长的等待，<a href='/city/perth/cn/'>珀斯</a>和<a href='/map/westernaustralia/cn/'>西澳大利亚</a>的空气质量数据终于可用。</p> <p>西澳大利亚州政府环境监管部 (DER) 现将数据发布在其网站上： <a href='http://www.der.wa.gov.au/your-environment/air'>der.wa.gov.au/your-environment/air</a> 。</p> <p>虽然到<a href='http://www.dec.wa.gov.au/pollution-prevention/air-quality/air-quality-data.html'>DEC 站点的</a>链接仍然不起作用，但可以从这个新<a href='http://www.der.wa.gov.au/component/newsfeeds/newsfeed/53-air-quality/1-air-quality-data?Itemid=101'>页面</a>访问该提要。</p> <br><br> <center><a href='https://aqicn.org/faq/2014-09-06/australian-air-quality-comparison-with-the-us-epa-aqi-scale/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2014-08-01/haier-air-box-can-it-provide-any-useful-air-quality-information/cn/' class='faqlisttitle'><span>海尔空调箱：可提供有用的空气质量数据？</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>August 1<sup>st</sup> 2014</small><div><small>https://aqicn.org/faq/2014-08-01/haier-air-box-can-it-provide-any-useful-air-quality-information/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2014-08-01/haier-air-box-can-it-provide-any-useful-air-quality-information/cn/"'><style type="text/css"> </style> <div style='float:right;padding-left:10px;'> <a href='http://item.jd.com/1159948.html' target=_jd> <img src='/images/haierairbox/airbox-green.jpg' border=0 height=300> </a> <br> </a> </div> 您可能无意中发现了海尔最新产品“空气盒子”。可从<a href='http://item.jd.com/1159948.html' target=_jd>jd.com</a>或 <a href='http://s.taobao.com/search?q=%BA%A3%B6%FB%BF%D5%C6%F8%BA%D0%D7%D3&s_from=newHeader&ssid=s5-e&search_type=item&sourceId=tb.item' target=_taobao >淘宝</a>买到。价格是399. 这是<a href='http://www.red-dot-21.com/products/haier-air-box-air-purifier-22140' target=_ style='color:black;'>设计精美</a>的一款产品。这是海尔“智慧生活”理念的一部分，旨在与智能空调一起使用。 <br> <br> 它声称能够同时测量挥发性有机化合物（<a href='http://wuu.wikipedia.org/wiki/%E6%8C%A5%E5%8F%91%E6%80%A7%E6%9C%89%E6%9C%BA%E5%8C%96%E5%90%88%E7%89%A9' target_)>VOC</a>，即臭氧），和PM2.5颗粒物。但是他的真实效果如何呢？要知道答案，请查看我们的最新正在进行的实验有关海尔的AirBox连接: <a href='/experiments/haier-air-box/'>experiments/haier-air-box</a>。 <br> <br> <center> <img src='/images/haierairbox/airbox-scale.jpg' border=0 style='max-width:100%'> </center> <center><br>-<svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"><path d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 1.0323169 5.7746616 2.1709106 3.96875 3.59375 C 2.3885774 4.8387345 1.3097647 6.3321654 1.0625 7.96875 A 1.0001 1.0001 0 0 0 1 8.40625 C 1 8.4709766 0.99753847 8.5296394 1 8.59375 C 0.99939321 8.6245955 1 8.6565744 1 8.6875 C 1.0067678 8.8049913 1.0164368 8.9159604 1.03125 9.03125 C 1.0536237 9.2185949 1.1014372 9.4156735 1.15625 9.59375 C 1.4590854 10.826485 2.2046296 11.91918 3.21875 12.78125 C 4.0779092 13.511593 5.1369309 14.083861 6.3125 14.53125 A 1.0001 1.0001 0 0 0 6.53125 14.9375 C 8.1339345 16.910035 12.101162 19.118434 18.1875 18.59375 A 1.0043849 1.0043849 0 0 0 18 16.59375 C 14.906411 16.860439 12.500325 16.269357 10.78125 15.5 C 14.30154 15.772761 18.245209 15.070028 21.71875 12.96875 A 1.0021949 1.0021949 0 1 0 20.6875 11.25 C 16.887924 13.548509 12.317006 14.000584 8.78125 13.21875 C 8.6725971 13.194724 8.5753958 13.151278 8.46875 13.125 C 10.108287 13.189898 11.88322 13.060799 13.6875 12.6875 C 16.718701 12.060355 19.36029 10.886006 21.21875 9.4375 C 23.067114 7.9968631 24.272087 6.1533076 23.875 4.21875 C 23.8732 4.20861 23.8769 4.197602 23.875 4.1875 C 23.513143 2.2541955 21.685558 1.0369822 19.4375 0.4375 C 18.307598 0.13619269 17.031654 -0.02489364 15.65625 -0.03125 z M 15.65625 1.96875 C 16.883971 1.97489 18.004902 2.1263073 18.9375 2.375 C 20.802695 2.8723854 21.754612 3.7133252 21.90625 4.5625 A 1.0001 1.0001 0 0 0 21.9375 4.625 C 22.12047 5.4788616 21.54154 6.6735055 20 7.875 C 18.45846 9.0764945 16.081299 10.145895 13.3125 10.71875 C 10.546306 11.291066 7.7660826 11.269646 5.8125 10.78125 C 4.8357087 10.537052 4.0847823 10.157122 3.625 9.78125 C 3.3682882 9.5713881 3.1893221 9.3858538 3.09375 9.1875 C 3.0413411 8.9743851 3.0082478 8.7545393 3 8.53125 C 3.0633474 7.4789308 3.7648202 6.2771492 5.1875 5.15625 C 6.6815884 3.9790894 8.91349 2.9489331 11.6875 2.375 C 13.071248 2.0887073 14.428529 1.9626064 15.65625 1.96875 z M 15.96875 3.65625 C 14.93792 3.617106 13.843984 3.69192 12.71875 3.90625 A 1.0001 1.0001 0 0 0 12.6875 3.9375 C 9.8940815 4.582135 7.6159262 5.8506824 6.5625 7.5625 A 1.0001 1.0001 0 1 0 8.25 8.625 C 8.7942179 7.740646 10.701734 6.434394 13.09375 5.875 C 13.10453 5.87295 13.11421 5.87702 13.125 5.875 C 15.064267 5.5112859 17.031887 5.6468794 18.03125 6.03125 A 1.0040202 1.0040202 0 0 0 18.75 4.15625 C 17.952461 3.8495042 16.99958 3.6953943 15.96875 3.65625 z M 9.15625 17.59375 A 1.0001 1.0001 0 0 0 8.5625 19.25 C 8.5625 19.25 11.033033 22.015963 15.53125 21.90625 A 1.0004882 1.0004882 0 1 0 15.46875 19.90625 C 11.766967 19.996537 10.0625 17.9375 10.0625 17.9375 A 1.0001 1.0001 0 0 0 9.15625 17.59375 z M 8.125 20.1875 A 1.0001 1.0001 0 0 0 7.40625 21.65625 C 7.40625 21.65625 8.6869767 23.974979 11.65625 24.09375 A 1.001098 1.001098 0 0 0 11.75 22.09375 C 9.7192733 22.012521 9.1875 20.75 9.1875 20.75 A 1.0001 1.0001 0 0 0 8.21875 20.1875 A 1.0001 1.0001 0 0 0 8.125 20.1875 z M 7.59375 23.0625 A 1.0001 1.0001 0 0 0 7.4375 23.09375 A 1.0001 1.0001 0 0 0 6.9375 23.34375 C 6.9375 23.34375 6.19375 24 5.09375 24 A 1.0001 1.0001 0 1 0 5.09375 26 C 6.99375 26 8.28125 24.84375 8.28125 24.84375 A 1.0001 1.0001 0 0 0 7.59375 23.0625 z" color="#000" ></path></svg>-<br><br></center> <div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2014-07-21/windows-mobile-application-now-available-from-the-microsoft-app-store/cn/' class='faqlisttitle'><span>新WP(Windows Phone)应用来了</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>July 21<sup>st</sup> 2014</small><div><small>https://aqicn.org/faq/2014-07-21/windows-mobile-application-now-available-from-the-microsoft-app-store/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2014-07-21/windows-mobile-application-now-available-from-the-microsoft-app-store/cn/"'><style type="text/css"> img.winmothumbnail { width:150px; height:250px; } .winmothumbnailcrop { height: 250px; overflow: hidden; display: inline-block; border:1px solid #eee; margin:5px; -box-shadow: 0 1px 3px rgba(0,0,0,0.5); -moz-box-shadow: 0 1px 3px rgba(0,0,0,0.5); -webkit-box-shadow: 0 1px 3px rgba(0,0,0,0.5); } </style> <div style='float:right;padding-left:10px;'> <img src='/images/winmo/lumia.jpg' border=0 height=350> </a> </div> The Windows Mobile 8 phone application is now available for download from the Microsoft Application Store: <a href='' target=_></a> <br> <br> <center> <a href='' target=_> <div class="winmothumbnailcrop"><img src='/images/winmo/winmo.4.jpg' class='winmothumbnail'></div> <div class="winmothumbnailcrop"><img src='/images/winmo/winmo.1.jpg' class='winmothumbnail'></div> <div class="winmothumbnailcrop"><img src='/images/winmo/winmo.3.jpg' class='winmothumbnail'></div> <div class="winmothumbnailcrop"><img src='/images/winmo/winmo.2.jpg' class='winmothumbnail'></div> <div class="winmothumbnailcrop"><img src='/images/winmo/winmo.5.jpg' class='winmothumbnail'></div> </a> </center> <br> <center><a href='https://aqicn.org/faq/2014-07-21/windows-mobile-application-now-available-from-the-microsoft-app-store/cn/' class='faq-read-more'><span>阅读全文</span></a></center><br><br> <div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2013-10-21/dylos-air-particule-conter-experiment-maintenance/cn/' class='faqlisttitle'><span>Dylos 空气微粒计数器实验维护</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>October 21<sup>st</sup> 2013</small><div><small>https://aqicn.org/faq/2013-10-21/dylos-air-particule-conter-experiment-maintenance/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-10-21/dylos-air-particule-conter-experiment-maintenance/cn/"'> <br> <br> <div style='border:1px solid #ccc;background: #f8f8f8;margin:10px 0;padding: 10px;font-size: 100%;'> <a href='/products/gaia'> <img src='/air/view/products/images/gaia-a12-mounting-with-strips-01.jpg' style='float:right;width:100px;'> </a> <p>注：本文写于 2013 年。虽然 Dylos 显示器仍然是一个不错的产品，但现在有更好、更实惠的监控产品，所以我们不建议再购买 Dylos 产品。</p> <center> <div style='height:1px;width: 33%;border-top:1px solid #888;margin:5px;'></div> </center> <p>例如，您可以查看 ES Labs 的<a href='/products/gaia/'>GAIA 空气质量监测站</a>产品系列。</p> <div style='clear:both'></div> </div> <br> <br> <a href='/faq/2013-09-08/dylos-air-particule-counter-experimentation-part-1/cn/'>Dylos的实验</a>已经进行50天了。上周末北京有很强的北风，空气污染降到很低，因此我们利用这个时间作为维护Dylos计数器的好机会 <br> <br> 原因是，虽然Dylos 计数器是精心设计与制造的仪器（我们确实这样认为），但是它或许并不是专门为在北京有时会出现的严重空气污染情况下而设计的。 <br> <br> 注意到在空气严重污染的情况下，dylos 与BAM 之间的相关图表读数在浓度超过38000以上的差距越来越大后，所以我们决定检查Dylos计数器内部的工作情况. 这种饱和现象是由于内部空气不能正常流通引起的严重结果,而空气不能正常流通是由于空气管道饱和后引起的。在空气严重污染的期间，由于大量颗粒物通过空气管道形成的这种现象是完全正常的。 <br> <br> 在打开Dylos检测器后，我们确认了内部空气通道在连续积累了五十天的灰尘后，确实已经饱和了。 <br> <br> <center> <img src='/images/dusty-dylos-monitor-1.jpg' height=350 border=0 style='max-width:100%' title='北京的灰尘可以影响 Dylos空气颗粒物计数器内部工作'>   <img src='/images/dusty-dylos-monitor-2.jpg' height=350 border=0 style='max-width:100%' title='北京的灰尘可以影响 Dylos空气颗粒物计数器内部工作'> <br> - 北京的灰尘可以影响 Dylos空气颗粒物计数器内部工作 - </center> <br> <br> 照片上的灰尘就是这次清洁的结果。使用一个细小精致的刷子，就可以清理出如此数量惊人的灰尘。这是在室外做了五十天实验后的结果。照片上的灰尘就是严重污染时空气中悬浮的可被吸入的颗粒物。 <br> <br> <center> <img src='/images/beijing-dust-1.jpg' width=930 max-width=80% border=0 style='max-width:100%' title='真实的北京灰尘，北京的人们在空气严重污染时所呼吸的'> <br>- 真实的北京灰尘，北京的人们在空气严重污染时所呼吸的。 - </center> <br> <br> 我们应该知道即使是BAM这样精密昂贵的专业设备都需要技术人员进行每个月的维护。因此在我们看到Dylos清洁维护后的灰尘就不必那么吃惊了。 <br> <br> 清洁维护已经过去10天了。从箭头2指示的部分，可以看出清洁前与清洁后Dylos 的读数数据与BAM的数据已经十分接近了。尽管清洁维护确实起到了效果，但是在空气污染极其严重的情况下，这种差距还是会存在的（可以比较1与3 部分）。我们会与Dylos公司联系，咨询他们对此种情况的解释与看法。 <br> <br> <center> <a href='/sensor/beijing/sanlitun/cn/'> <img src='/images/dylos-monitor-vs-bam-monitor-correlation-impact-after-cleaning-1.jpg' width=80% max-width=930px border=0 style='max-width:100%'> </a> <br> (点击照片可以打开全部的实时数据) <br> </center> <center><br>-<svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"><path d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 1.0323169 5.7746616 2.1709106 3.96875 3.59375 C 2.3885774 4.8387345 1.3097647 6.3321654 1.0625 7.96875 A 1.0001 1.0001 0 0 0 1 8.40625 C 1 8.4709766 0.99753847 8.5296394 1 8.59375 C 0.99939321 8.6245955 1 8.6565744 1 8.6875 C 1.0067678 8.8049913 1.0164368 8.9159604 1.03125 9.03125 C 1.0536237 9.2185949 1.1014372 9.4156735 1.15625 9.59375 C 1.4590854 10.826485 2.2046296 11.91918 3.21875 12.78125 C 4.0779092 13.511593 5.1369309 14.083861 6.3125 14.53125 A 1.0001 1.0001 0 0 0 6.53125 14.9375 C 8.1339345 16.910035 12.101162 19.118434 18.1875 18.59375 A 1.0043849 1.0043849 0 0 0 18 16.59375 C 14.906411 16.860439 12.500325 16.269357 10.78125 15.5 C 14.30154 15.772761 18.245209 15.070028 21.71875 12.96875 A 1.0021949 1.0021949 0 1 0 20.6875 11.25 C 16.887924 13.548509 12.317006 14.000584 8.78125 13.21875 C 8.6725971 13.194724 8.5753958 13.151278 8.46875 13.125 C 10.108287 13.189898 11.88322 13.060799 13.6875 12.6875 C 16.718701 12.060355 19.36029 10.886006 21.21875 9.4375 C 23.067114 7.9968631 24.272087 6.1533076 23.875 4.21875 C 23.8732 4.20861 23.8769 4.197602 23.875 4.1875 C 23.513143 2.2541955 21.685558 1.0369822 19.4375 0.4375 C 18.307598 0.13619269 17.031654 -0.02489364 15.65625 -0.03125 z M 15.65625 1.96875 C 16.883971 1.97489 18.004902 2.1263073 18.9375 2.375 C 20.802695 2.8723854 21.754612 3.7133252 21.90625 4.5625 A 1.0001 1.0001 0 0 0 21.9375 4.625 C 22.12047 5.4788616 21.54154 6.6735055 20 7.875 C 18.45846 9.0764945 16.081299 10.145895 13.3125 10.71875 C 10.546306 11.291066 7.7660826 11.269646 5.8125 10.78125 C 4.8357087 10.537052 4.0847823 10.157122 3.625 9.78125 C 3.3682882 9.5713881 3.1893221 9.3858538 3.09375 9.1875 C 3.0413411 8.9743851 3.0082478 8.7545393 3 8.53125 C 3.0633474 7.4789308 3.7648202 6.2771492 5.1875 5.15625 C 6.6815884 3.9790894 8.91349 2.9489331 11.6875 2.375 C 13.071248 2.0887073 14.428529 1.9626064 15.65625 1.96875 z M 15.96875 3.65625 C 14.93792 3.617106 13.843984 3.69192 12.71875 3.90625 A 1.0001 1.0001 0 0 0 12.6875 3.9375 C 9.8940815 4.582135 7.6159262 5.8506824 6.5625 7.5625 A 1.0001 1.0001 0 1 0 8.25 8.625 C 8.7942179 7.740646 10.701734 6.434394 13.09375 5.875 C 13.10453 5.87295 13.11421 5.87702 13.125 5.875 C 15.064267 5.5112859 17.031887 5.6468794 18.03125 6.03125 A 1.0040202 1.0040202 0 0 0 18.75 4.15625 C 17.952461 3.8495042 16.99958 3.6953943 15.96875 3.65625 z M 9.15625 17.59375 A 1.0001 1.0001 0 0 0 8.5625 19.25 C 8.5625 19.25 11.033033 22.015963 15.53125 21.90625 A 1.0004882 1.0004882 0 1 0 15.46875 19.90625 C 11.766967 19.996537 10.0625 17.9375 10.0625 17.9375 A 1.0001 1.0001 0 0 0 9.15625 17.59375 z M 8.125 20.1875 A 1.0001 1.0001 0 0 0 7.40625 21.65625 C 7.40625 21.65625 8.6869767 23.974979 11.65625 24.09375 A 1.001098 1.001098 0 0 0 11.75 22.09375 C 9.7192733 22.012521 9.1875 20.75 9.1875 20.75 A 1.0001 1.0001 0 0 0 8.21875 20.1875 A 1.0001 1.0001 0 0 0 8.125 20.1875 z M 7.59375 23.0625 A 1.0001 1.0001 0 0 0 7.4375 23.09375 A 1.0001 1.0001 0 0 0 6.9375 23.34375 C 6.9375 23.34375 6.19375 24 5.09375 24 A 1.0001 1.0001 0 1 0 5.09375 26 C 6.99375 26 8.28125 24.84375 8.28125 24.84375 A 1.0001 1.0001 0 0 0 7.59375 23.0625 z" color="#000" ></path></svg>-<br><br></center><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2013-09-09/revised-pm25-aqi-breakpoints/cn/' class='faqlisttitle'><span>修订PM<sub>2.5</sub> 空气质量指数的断点</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>September 9<sup>th</sup> 2013</small><div><small>https://aqicn.org/faq/2013-09-09/revised-pm25-aqi-breakpoints/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-09-09/revised-pm25-aqi-breakpoints/cn/"'> 因为一些历史原因，世界空气质量指数项目的网站上一些城市的空气质量指数换算公式没有使用2012 EPA 更新的PM2.5 标准。仅涉及到亚洲，例如日本，台湾。其他大洲（包括美洲，欧州及大洋洲）则一直使用2012 标准。 <br> <br> 与（1999年发布的）前一版相比，2012年12月14日发布的新版EPA标准的主要变化是吧PM2.5空气质量指数的每个等级的15µg/m <sup>3</sup> 降到了12µg/m<sup>3</sup>。 <br> <br> 2013年9月9日以后，所有的国家都使用更新后的PM2.5 空气质量换算数值范围，如表格所示： <br> <br><center><a href='https://aqicn.org/faq/2013-09-09/revised-pm25-aqi-breakpoints/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2013-09-08/dylos-air-particule-counter-experimentation-part-1/cn/' class='faqlisttitle'><span> Dylos 空气微粒计数器实验，第一部分</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>September 8<sup>th</sup> 2013</small><div><small>https://aqicn.org/faq/2013-09-08/dylos-air-particule-counter-experimentation-part-1/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-09-08/dylos-air-particule-counter-experimentation-part-1/cn/"'> <div style='float:right;padding-left:10px;'> <img src='/air/faq/images/FPM-377.png' border=0> </div> 测量空气质量最常见的方法，只要是有关PM<sub>10</sub> 与 PM<sub>2.5</sub>微粒的检测，就会使用Beta衰减检测器（<i>Beta Attenuation Monitors</i>），又叫做BAM（请看右侧的图片）。这些都是专业仪器，也是中国，美国和其他大都数国家官方唯一用来检测空气质量的仪器。最有名的制造商是位于美国的<a href='http://www.metone.com/' target=_>Met-One</a>公司。 <br><br> BAM的工作原理非常简单：它可以测量beta粒子（电子）穿不通过一层薄薄的悬浮微粒物质（PM）后减少的数量。随着PM层厚度的增加，能穿过的beta粒子数量越低。 <br> <br> <center> <a href='http://alg.umbc.edu/umap/bam_index.html' target=_> <img src='/air/faq/images/bam.jpg' width=500 style='max-width:100%' border=0> </a> </center> <br> <br> BAM仪器的唯一的主要问题就是它的价格。它的价格预计在12万人民币左右（1万5千欧元）。在中国，目前官方监测站大约有500个BAM仪器（平均每个城市大约有10个监测站）。但是这些还不够，由于还有许多城市不能提供PM<sub>2.5</sub>读数。在泰国，有21个自动（提供每小时读数的）监测站，但是却没有一个可以提供PM<sub>2.5</sub>数据的监测站。在越南，全国只有3个监测站。 <br> <br> <center>oOo</center> <br> <br> 因此，在等待全世界各国政府过买更多最新的Beta 衰减检测器的时候，有没有别的事情可以做呢？答案是有的！事实上，有一种相对可负担得起的仪器可以用来检测空气质量中的PM<sub>10</sub> 和 PM<sub>2.5</sub>的数值。其中最有名的是<i>Dylos空气微粒计数器(Dylos Air Particule counter)</i>： <br><br> <center> <a href="http://www.amazon.com/gp/product/B00ELPP9TW/ref=as_li_ss_il?ie=UTF8&camp=1789&creative=390957&creativeASIN=B00ELPP9TW&linkCode=as2&tag=aqicninfo-20" target=_> <img src='/air/faq/images/dylos01.jpg' height=250 border=0> <img src='/air/faq/images/dylos03.jpg' height=250 border=0> <img src='/air/faq/images/dylos_patent.jpg' height=250 border=0> </a> </center> <br> <br> <br> 如果你想了解更多有关Dylos空气微粒计数器的工作原理，请参考<a href='http://woodgears.ca/dust/dylos.html' target=_>Matthias</a> 在逆向工程方面杰出的研究，或者直接访问Dylos的网站(<a href='http://www.dylosproducts.com/dcproairqumo.html' target=_>www.dylosproducts.com/</a>). 您也可以参考resarch纸 “<a href='/air/doc/a-low-cost-instrument-for-environmental-particulate-analysis-based-on-optical-scattering.pdf'> <i>A low-cost instrument for environmental particulate analysis based on optical scattering</i></a>”来了解测量理论。 <br> <br> <div style='border:1px solid #ccc;background: #f8f8f8;margin:10px 0;padding: 10px;font-size: 100%;'> <a href='/products/gaia'> <img src='/air/view/products/images/gaia-a12-mounting-with-strips-01.jpg' style='float:right;width:100px;'> </a> Note: this article was written in 2013. While the Dylos monitor is still a good product, there is nowdays much better and affordable monitoring products, so we do not recommend purchasing the Dylos product anymore. <center> <div style='height:1px;width: 33%;border-top:1px solid #888;margin:5px;'></div> </center> You can for instance check the <a href='/products/gaia/'>GAIA air quality monitoring stations</a> product range from ES Labs. <div style='clear:both'></div> </div> <center><br>-<svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"><path d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 1.0323169 5.7746616 2.1709106 3.96875 3.59375 C 2.3885774 4.8387345 1.3097647 6.3321654 1.0625 7.96875 A 1.0001 1.0001 0 0 0 1 8.40625 C 1 8.4709766 0.99753847 8.5296394 1 8.59375 C 0.99939321 8.6245955 1 8.6565744 1 8.6875 C 1.0067678 8.8049913 1.0164368 8.9159604 1.03125 9.03125 C 1.0536237 9.2185949 1.1014372 9.4156735 1.15625 9.59375 C 1.4590854 10.826485 2.2046296 11.91918 3.21875 12.78125 C 4.0779092 13.511593 5.1369309 14.083861 6.3125 14.53125 A 1.0001 1.0001 0 0 0 6.53125 14.9375 C 8.1339345 16.910035 12.101162 19.118434 18.1875 18.59375 A 1.0043849 1.0043849 0 0 0 18 16.59375 C 14.906411 16.860439 12.500325 16.269357 10.78125 15.5 C 14.30154 15.772761 18.245209 15.070028 21.71875 12.96875 A 1.0021949 1.0021949 0 1 0 20.6875 11.25 C 16.887924 13.548509 12.317006 14.000584 8.78125 13.21875 C 8.6725971 13.194724 8.5753958 13.151278 8.46875 13.125 C 10.108287 13.189898 11.88322 13.060799 13.6875 12.6875 C 16.718701 12.060355 19.36029 10.886006 21.21875 9.4375 C 23.067114 7.9968631 24.272087 6.1533076 23.875 4.21875 C 23.8732 4.20861 23.8769 4.197602 23.875 4.1875 C 23.513143 2.2541955 21.685558 1.0369822 19.4375 0.4375 C 18.307598 0.13619269 17.031654 -0.02489364 15.65625 -0.03125 z M 15.65625 1.96875 C 16.883971 1.97489 18.004902 2.1263073 18.9375 2.375 C 20.802695 2.8723854 21.754612 3.7133252 21.90625 4.5625 A 1.0001 1.0001 0 0 0 21.9375 4.625 C 22.12047 5.4788616 21.54154 6.6735055 20 7.875 C 18.45846 9.0764945 16.081299 10.145895 13.3125 10.71875 C 10.546306 11.291066 7.7660826 11.269646 5.8125 10.78125 C 4.8357087 10.537052 4.0847823 10.157122 3.625 9.78125 C 3.3682882 9.5713881 3.1893221 9.3858538 3.09375 9.1875 C 3.0413411 8.9743851 3.0082478 8.7545393 3 8.53125 C 3.0633474 7.4789308 3.7648202 6.2771492 5.1875 5.15625 C 6.6815884 3.9790894 8.91349 2.9489331 11.6875 2.375 C 13.071248 2.0887073 14.428529 1.9626064 15.65625 1.96875 z M 15.96875 3.65625 C 14.93792 3.617106 13.843984 3.69192 12.71875 3.90625 A 1.0001 1.0001 0 0 0 12.6875 3.9375 C 9.8940815 4.582135 7.6159262 5.8506824 6.5625 7.5625 A 1.0001 1.0001 0 1 0 8.25 8.625 C 8.7942179 7.740646 10.701734 6.434394 13.09375 5.875 C 13.10453 5.87295 13.11421 5.87702 13.125 5.875 C 15.064267 5.5112859 17.031887 5.6468794 18.03125 6.03125 A 1.0040202 1.0040202 0 0 0 18.75 4.15625 C 17.952461 3.8495042 16.99958 3.6953943 15.96875 3.65625 z M 9.15625 17.59375 A 1.0001 1.0001 0 0 0 8.5625 19.25 C 8.5625 19.25 11.033033 22.015963 15.53125 21.90625 A 1.0004882 1.0004882 0 1 0 15.46875 19.90625 C 11.766967 19.996537 10.0625 17.9375 10.0625 17.9375 A 1.0001 1.0001 0 0 0 9.15625 17.59375 z M 8.125 20.1875 A 1.0001 1.0001 0 0 0 7.40625 21.65625 C 7.40625 21.65625 8.6869767 23.974979 11.65625 24.09375 A 1.001098 1.001098 0 0 0 11.75 22.09375 C 9.7192733 22.012521 9.1875 20.75 9.1875 20.75 A 1.0001 1.0001 0 0 0 8.21875 20.1875 A 1.0001 1.0001 0 0 0 8.125 20.1875 z M 7.59375 23.0625 A 1.0001 1.0001 0 0 0 7.4375 23.09375 A 1.0001 1.0001 0 0 0 6.9375 23.34375 C 6.9375 23.34375 6.19375 24 5.09375 24 A 1.0001 1.0001 0 1 0 5.09375 26 C 6.99375 26 8.28125 24.84375 8.28125 24.84375 A 1.0001 1.0001 0 0 0 7.59375 23.0625 z" color="#000" ></path></svg>-<br><br></center> <br> <br> 为了证明dylos仪器同样可以用来作为检测空气质量的仪器，我们在我们的实验室里用Dylos DC 1100 <b>Pro, 带PC接口</b>设置了一个实验。这个专业版的仪器可以在亚马逊上买到，价格是319美元（1888人民币）。虽然相比之下Dylos DC 1100 较便宜些，但是需要注意的是必须要购买专业版的仪器（<b>Pro, 带PC接口</b>），因为它提供一个电脑接口，可以强制自动提取数据。 <br> <br> 如果你想在中国购买Dylos DC 1100 <b>Pro, 带PC接口</b>仪器，请确定你购买的正确的专业版仪器。目前，在京东上海没有找到出售专业版仪器的卖家，在淘宝上只有几个卖家。如果你真的想尽快买到我们推荐的Dylos DC 1100 <b>Pro, 带PC接口</b> 专业版仪器，但是又不想等待到货时间，可以购买价格更贵的<a href='http://item.jd.com/1015450392.html' target=_jd>Dylos DC 1700</a>，但是Dylos DC1700仅是做了一些简单的升级，并不会改变我们检测出的空气质量检测结果。 <br> <br> <center><br>-<svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"><path d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 1.0323169 5.7746616 2.1709106 3.96875 3.59375 C 2.3885774 4.8387345 1.3097647 6.3321654 1.0625 7.96875 A 1.0001 1.0001 0 0 0 1 8.40625 C 1 8.4709766 0.99753847 8.5296394 1 8.59375 C 0.99939321 8.6245955 1 8.6565744 1 8.6875 C 1.0067678 8.8049913 1.0164368 8.9159604 1.03125 9.03125 C 1.0536237 9.2185949 1.1014372 9.4156735 1.15625 9.59375 C 1.4590854 10.826485 2.2046296 11.91918 3.21875 12.78125 C 4.0779092 13.511593 5.1369309 14.083861 6.3125 14.53125 A 1.0001 1.0001 0 0 0 6.53125 14.9375 C 8.1339345 16.910035 12.101162 19.118434 18.1875 18.59375 A 1.0043849 1.0043849 0 0 0 18 16.59375 C 14.906411 16.860439 12.500325 16.269357 10.78125 15.5 C 14.30154 15.772761 18.245209 15.070028 21.71875 12.96875 A 1.0021949 1.0021949 0 1 0 20.6875 11.25 C 16.887924 13.548509 12.317006 14.000584 8.78125 13.21875 C 8.6725971 13.194724 8.5753958 13.151278 8.46875 13.125 C 10.108287 13.189898 11.88322 13.060799 13.6875 12.6875 C 16.718701 12.060355 19.36029 10.886006 21.21875 9.4375 C 23.067114 7.9968631 24.272087 6.1533076 23.875 4.21875 C 23.8732 4.20861 23.8769 4.197602 23.875 4.1875 C 23.513143 2.2541955 21.685558 1.0369822 19.4375 0.4375 C 18.307598 0.13619269 17.031654 -0.02489364 15.65625 -0.03125 z M 15.65625 1.96875 C 16.883971 1.97489 18.004902 2.1263073 18.9375 2.375 C 20.802695 2.8723854 21.754612 3.7133252 21.90625 4.5625 A 1.0001 1.0001 0 0 0 21.9375 4.625 C 22.12047 5.4788616 21.54154 6.6735055 20 7.875 C 18.45846 9.0764945 16.081299 10.145895 13.3125 10.71875 C 10.546306 11.291066 7.7660826 11.269646 5.8125 10.78125 C 4.8357087 10.537052 4.0847823 10.157122 3.625 9.78125 C 3.3682882 9.5713881 3.1893221 9.3858538 3.09375 9.1875 C 3.0413411 8.9743851 3.0082478 8.7545393 3 8.53125 C 3.0633474 7.4789308 3.7648202 6.2771492 5.1875 5.15625 C 6.6815884 3.9790894 8.91349 2.9489331 11.6875 2.375 C 13.071248 2.0887073 14.428529 1.9626064 15.65625 1.96875 z M 15.96875 3.65625 C 14.93792 3.617106 13.843984 3.69192 12.71875 3.90625 A 1.0001 1.0001 0 0 0 12.6875 3.9375 C 9.8940815 4.582135 7.6159262 5.8506824 6.5625 7.5625 A 1.0001 1.0001 0 1 0 8.25 8.625 C 8.7942179 7.740646 10.701734 6.434394 13.09375 5.875 C 13.10453 5.87295 13.11421 5.87702 13.125 5.875 C 15.064267 5.5112859 17.031887 5.6468794 18.03125 6.03125 A 1.0040202 1.0040202 0 0 0 18.75 4.15625 C 17.952461 3.8495042 16.99958 3.6953943 15.96875 3.65625 z M 9.15625 17.59375 A 1.0001 1.0001 0 0 0 8.5625 19.25 C 8.5625 19.25 11.033033 22.015963 15.53125 21.90625 A 1.0004882 1.0004882 0 1 0 15.46875 19.90625 C 11.766967 19.996537 10.0625 17.9375 10.0625 17.9375 A 1.0001 1.0001 0 0 0 9.15625 17.59375 z M 8.125 20.1875 A 1.0001 1.0001 0 0 0 7.40625 21.65625 C 7.40625 21.65625 8.6869767 23.974979 11.65625 24.09375 A 1.001098 1.001098 0 0 0 11.75 22.09375 C 9.7192733 22.012521 9.1875 20.75 9.1875 20.75 A 1.0001 1.0001 0 0 0 8.21875 20.1875 A 1.0001 1.0001 0 0 0 8.125 20.1875 z M 7.59375 23.0625 A 1.0001 1.0001 0 0 0 7.4375 23.09375 A 1.0001 1.0001 0 0 0 6.9375 23.34375 C 6.9375 23.34375 6.19375 24 5.09375 24 A 1.0001 1.0001 0 1 0 5.09375 26 C 6.99375 26 8.28125 24.84375 8.28125 24.84375 A 1.0001 1.0001 0 0 0 7.59375 23.0625 z" color="#000" ></path></svg>-<br><br></center> <br> <br> 为了把自动提取的数据传输到服务器，还需要：<a href='http://detail.tmall.com/item.htm?id=17337394004' target=_tmall>Raspberry PI</a> （278人民币）和一个<a href='http://item.jd.com/1018803181.html' target=_jd>连接USB数据线</a>（20人民币），清单总计：2188人民币左右。 <br><br> <center> <table style='border:1px dashed black;text-align:center;'> <tr> <td> <a href="//www.amazon.com/gp/product/B014V2BFWE/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B014V2BFWE&linkCode=as2&tag=aqicninfo-20&linkId=7XJO4AOXI4ABOAEG"><img border="0" src="//ws-na.amazon-adsystem.com/widgets/q?_encoding=UTF8&ASIN=B014V2BFWE&Format=_SL110_&ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=aqicninfo-20"></a><img src="//ir-na.amazon-adsystem.com/e/ir?t=aqicninfo-20&l=as2&o=1&a=B014V2BFWE" width="1" height="1" border="0" alt="" style="border:none !important; margin:0px !important;" /> </td> <td> <a target=amazon href="//www.amazon.com/gp/product/B0007OWNYA/ref=as_li_ss_il?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0007OWNYA&linkCode=as2&tag=aqicninfo-20"><img height=66% border="0" src="//ws-na.amazon-adsystem.com/widgets/q?_encoding=UTF8&ASIN=B0007OWNYA&Format=_SL160_&ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=aqicninfo-20"></a><img src="//ir-na.amazon-adsystem.com/e/ir?t=aqicninfo-20&l=as2&o=1&a=B0007OWNYA" width="1" height="1" border="0" alt="" style="border:none !important; margin:0px !important;" /> </td> <td> <a target=amazon href="//www.amazon.com/gp/product/B008XVAVAW/ref=as_li_ss_il?ie=UTF8&camp=1789&creative=390957&creativeASIN=B008XVAVAW&linkCode=as2&tag=aqicninfo-20"><img height=66% border="0" src="//ws-na.amazon-adsystem.com/widgets/q?_encoding=UTF8&ASIN=B008XVAVAW&Format=_SL160_&ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=aqicninfo-20"></a><img src="//ir-na.amazon-adsystem.com/e/ir?t=aqicninfo-20&l=as2&o=1&a=B008XVAVAW" width="1" height="1" border="0" alt="" style="border:none !important; margin:0px !important;" /> </td> </tr> <tr> <td> <small>Dylos DC1100 pro<br>with PC interface </td> <td> <small>Serial to USB cable </td> <td> <small>Raspberry PI </td> </tr> </table> </center> <br> <br> The documentation and scripts for connecting the Dylos particules counter to the Raspberry PI, and automatically uploading the dylos data to the World Air Quality project server are available freely from github: <a href='https://github.com/aqicn/dylos' target=_>github.com</a>. If you have any questions, you can <a href='/contact/'>contact us</a> with the subject "Dylos Experiment". <br> <br> Also, please note that when you setup your Dylos Particule Counter outside, you need to be carefull where you locate it. Ideally, it should be in a place which is not too windy, as the wind can have a significant impact on the readings (The reason is that the Dylos counter is using a simple fan to get the air inflow, and the volume of air inflow per minute needs to be constant in order to have accurate readings ~ This simple fan is one of the reason why this kind of material is so affordable compared to the professional MetOne BAM sensors). <br> <br> <center><br>-<svg xmlns="http://www.w3.org/2000/svg" width="28" height="28" version="1" viewBox="0 0 26 26" enable-background="new 0 0 26 26"><path d="M 15.65625 -0.03125 C 14.280846 -0.03760636 12.828752 0.09254274 11.3125 0.40625 C 8.28651 1.0323169 5.7746616 2.1709106 3.96875 3.59375 C 2.3885774 4.8387345 1.3097647 6.3321654 1.0625 7.96875 A 1.0001 1.0001 0 0 0 1 8.40625 C 1 8.4709766 0.99753847 8.5296394 1 8.59375 C 0.99939321 8.6245955 1 8.6565744 1 8.6875 C 1.0067678 8.8049913 1.0164368 8.9159604 1.03125 9.03125 C 1.0536237 9.2185949 1.1014372 9.4156735 1.15625 9.59375 C 1.4590854 10.826485 2.2046296 11.91918 3.21875 12.78125 C 4.0779092 13.511593 5.1369309 14.083861 6.3125 14.53125 A 1.0001 1.0001 0 0 0 6.53125 14.9375 C 8.1339345 16.910035 12.101162 19.118434 18.1875 18.59375 A 1.0043849 1.0043849 0 0 0 18 16.59375 C 14.906411 16.860439 12.500325 16.269357 10.78125 15.5 C 14.30154 15.772761 18.245209 15.070028 21.71875 12.96875 A 1.0021949 1.0021949 0 1 0 20.6875 11.25 C 16.887924 13.548509 12.317006 14.000584 8.78125 13.21875 C 8.6725971 13.194724 8.5753958 13.151278 8.46875 13.125 C 10.108287 13.189898 11.88322 13.060799 13.6875 12.6875 C 16.718701 12.060355 19.36029 10.886006 21.21875 9.4375 C 23.067114 7.9968631 24.272087 6.1533076 23.875 4.21875 C 23.8732 4.20861 23.8769 4.197602 23.875 4.1875 C 23.513143 2.2541955 21.685558 1.0369822 19.4375 0.4375 C 18.307598 0.13619269 17.031654 -0.02489364 15.65625 -0.03125 z M 15.65625 1.96875 C 16.883971 1.97489 18.004902 2.1263073 18.9375 2.375 C 20.802695 2.8723854 21.754612 3.7133252 21.90625 4.5625 A 1.0001 1.0001 0 0 0 21.9375 4.625 C 22.12047 5.4788616 21.54154 6.6735055 20 7.875 C 18.45846 9.0764945 16.081299 10.145895 13.3125 10.71875 C 10.546306 11.291066 7.7660826 11.269646 5.8125 10.78125 C 4.8357087 10.537052 4.0847823 10.157122 3.625 9.78125 C 3.3682882 9.5713881 3.1893221 9.3858538 3.09375 9.1875 C 3.0413411 8.9743851 3.0082478 8.7545393 3 8.53125 C 3.0633474 7.4789308 3.7648202 6.2771492 5.1875 5.15625 C 6.6815884 3.9790894 8.91349 2.9489331 11.6875 2.375 C 13.071248 2.0887073 14.428529 1.9626064 15.65625 1.96875 z M 15.96875 3.65625 C 14.93792 3.617106 13.843984 3.69192 12.71875 3.90625 A 1.0001 1.0001 0 0 0 12.6875 3.9375 C 9.8940815 4.582135 7.6159262 5.8506824 6.5625 7.5625 A 1.0001 1.0001 0 1 0 8.25 8.625 C 8.7942179 7.740646 10.701734 6.434394 13.09375 5.875 C 13.10453 5.87295 13.11421 5.87702 13.125 5.875 C 15.064267 5.5112859 17.031887 5.6468794 18.03125 6.03125 A 1.0040202 1.0040202 0 0 0 18.75 4.15625 C 17.952461 3.8495042 16.99958 3.6953943 15.96875 3.65625 z M 9.15625 17.59375 A 1.0001 1.0001 0 0 0 8.5625 19.25 C 8.5625 19.25 11.033033 22.015963 15.53125 21.90625 A 1.0004882 1.0004882 0 1 0 15.46875 19.90625 C 11.766967 19.996537 10.0625 17.9375 10.0625 17.9375 A 1.0001 1.0001 0 0 0 9.15625 17.59375 z M 8.125 20.1875 A 1.0001 1.0001 0 0 0 7.40625 21.65625 C 7.40625 21.65625 8.6869767 23.974979 11.65625 24.09375 A 1.001098 1.001098 0 0 0 11.75 22.09375 C 9.7192733 22.012521 9.1875 20.75 9.1875 20.75 A 1.0001 1.0001 0 0 0 8.21875 20.1875 A 1.0001 1.0001 0 0 0 8.125 20.1875 z M 7.59375 23.0625 A 1.0001 1.0001 0 0 0 7.4375 23.09375 A 1.0001 1.0001 0 0 0 6.9375 23.34375 C 6.9375 23.34375 6.19375 24 5.09375 24 A 1.0001 1.0001 0 1 0 5.09375 26 C 6.99375 26 8.28125 24.84375 8.28125 24.84375 A 1.0001 1.0001 0 0 0 7.59375 23.0625 z" color="#000" ></path></svg>-<br><br></center> <br> <br> 为了更好地比较Dylos与BAM两种仪器的读数，因为给我们提供Dylos数据的监测站在三里屯SOHO附近，因此，我们采用了朝阳区农业展览馆监测站提供的BAM数据。 <br> <br> 这里是两种数据的实时结果：蓝色的数据线是Dylos的读数（每分钟更新），红色的数据线表示的是BAM的数据（每小时更新）。第一幅曲线图比较的是PM10的读数，第二幅图比较的是PM<sub>2.5</sub>的读数。 <br> <br> <br> <center> <a href='/sensor/beijing/sanlitun/cn/' target=_> <img src='/air/view/sensor/snapshot.jpg' border=0 width=80% max-width=930px style='max-width:100%'> </a> <br> (点击照片可以打开全部的实时数据) <br> </center> <br> <br> <br> 如图所见，Dylos与BAM读数间的相似度非常高，但也并不总是对得上的。在这篇文章的第二部分（将在两个后，收集到足够的数据后发表），我们将提供更多有关读书的统计分析数据。 <br><br> 如果你有兴趣参加这个实验，建立你自己的Dylos监测站，请与我们联系。我们会为你提供所有的程序代码与设置细节，安置你的数据库传感器，这样你就可以实时观测到你自己的读数了。 <br> <br> <center>oOo</center><div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2013-06-25/singapore-psi-and-pm25-aqi-why-is-there-a-difference-between-the-two-readings/cn/' class='faqlisttitle'><span>新加坡 PSI 和 PM <sub>2.5</sub> AQI：为什么两个读数存在差异？</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>June 25<sup>th</sup> 2013</small><div><small>https://aqicn.org/faq/2013-06-25/singapore-psi-and-pm25-aqi-why-is-there-a-difference-between-the-two-readings/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-06-25/singapore-psi-and-pm25-aqi-why-is-there-a-difference-between-the-two-readings/cn/"'> <p> With the recent <a href='http://www.reuters.com/article/2013/06/25/southeastasia-haze-idUSL3N0F043720130625'>Southeast Asia Smog from Indonesia</a> affecting Singapore and now <a href='http://www.bbc.co.uk/news/world-asia-23018947' target=_>Malaysia</a>, we got many questions about why there is a difference between the data which can be read from Singapore NEA website (<a href='http://nea.gov.sg/' target=_>nea.gov.sg</a>) and the World Air Quality Index project <a href='/city/singapore/central/cn/'>Singapore webpage</a>. </p> <p>例如，今天可以在 NEA 网站上看到以下内容：</p> <center> <img src='/images/nea.sg.png' width=600 style='max-width:100%'> </center> <br> <br><center><a href='https://aqicn.org/faq/2013-06-25/singapore-psi-and-pm25-aqi-why-is-there-a-difference-between-the-two-readings/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2013-05-20/shenyang-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shenyang/cn/' class='faqlisttitle'><span>沉阳PM <sub>2.5</sub>主要AQI更新：沉阳3个测量站PM <sub>2.5</sub>数据对比</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>May 20<sup>th</sup> 2013</small><div><small>https://aqicn.org/faq/2013-05-20/shenyang-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shenyang/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-05-20/shenyang-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shenyang/cn/"'> Shenyang city AQI data is now based on the maximum of the <a href='https://aqicn.org/city/shenyang/usconsulate/cn/'>沈阳美国总领事馆 (Shenyang US Consulate)</a>, <a href='https://aqicn.org/city/china/shenyang/taiyuanjie/cn/'>沈阳太原街 (Taiyuan Street, Shenyang)</a> and <a href='https://aqicn.org/city/china/shenyang/beiling/cn/'>沈阳北陵 (Beiling, Shenyang)</a>. For more infomation, please refer to the article about <a href='/faq/2013-01-19/shanghai-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shanghai'> Shanghai AQI. <br><br> <br><center><a href='https://aqicn.org/faq/2013-05-20/shenyang-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shenyang/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2013-02-07/air-quality-designation-update-to-the-epa-airnow-standard/cn/' class='faqlisttitle'><span>空气质量指示：已更新为美国环保署（EPA）AirNow 标准</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>February 7<sup>th</sup> 2013</small><div><small>https://aqicn.org/faq/2013-02-07/air-quality-designation-update-to-the-epa-airnow-standard/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-02-07/air-quality-designation-update-to-the-epa-airnow-standard/cn/"'> 由于历史原因，世界空气质量指数项目的网站一直使用的是中国环保部所指定的空气质量标准。从现在开始，所有的指示将会被沿用，并采用美国环保署的 <a href='http://www.airnow.gov/index.cfm?action=aqibasics.aqi'>AirNow</a>标准。 <br> <br> 以下表格概括了两种标准在各种语言间的不同指示。 <br> <br> <style type="text/css"> @media only screen and (max-width: 700px) { .aqih-2012-scale td:nth-child(5) { display: none;} .aqih-2012-scale td:nth-child(6) { display: none;} .aqih-2012-scale td:nth-child(7) { display: none;} .aqih-2012-scale td:nth-child(8) { display: none;} .aqih-2012-scale td { padding:0px!important; }} </style> <table class='fetching aqih-2012-scale'> <tr> <td width=10%><b>空气质量指数范围</td> <td width=10%><b>之前使用的中国环保局的指示</td> <td width=10%><b>现用的美国环保署的AirNow 指示</td> <td width=10%><b>之前的中文翻译</td> <td width=10%><b>新的中文翻译</td> <td width=10%><b>新的日文翻译</td> <td width=10%><b>新的韩语翻译</td> <td width=10%><b>新的俄语翻译</td> <td width=10%><b>颜色代码</td> </tr> <tr><td>0-50</td> <td>Excellent</td> <td>Good</td> <td>优秀</td> <td>优</td><td>優</td><td>파랑</td><td>Среднее </td> <td style='background-color:#009966;color:white;'></td> </tr> <tr><td>51-100 </td> <td>Good </td> <td>Moderate </td> <td>好</td> <td>良</td><td>良</td><td>초록</td><td>Неподходящее для особо восприимчивых </td> <td style='background-color:#ffde33'></td> </tr> <tr><td>101-150</td> <td>Lightly Polluted </td> <td>Unhealthy for Sensitive Groups </td> <td>微污染</td> <td>轻度污染</td><td>軽微汚染</td><td>노랑</td><td>Плохое </td> <td style='background-color:#ff9933;color:white;'></td> </tr> <tr><td>151-200 </td> <td>Moderately Polluted </td> <td>Unhealthy </td> <td>轻度污染</td> <td>中度污染</td><td>軽度汚染</td><td>주황</td><td>Нездоровое </td> <td style='background-color:#cc0033;color:white;'></td> </tr> <tr><td>201-300 </td> <td>Heavily Polluted </td> <td>Very Unhealthy </td> <td>中度污染，重污染</td> <td>中度污染</td><td>中度汚染</td><td>빨강</td><td>Очень нездоровое </td> <td style='background-color:#660099;color:white;'></td> </tr> <tr><td>301-500 </td> <td>Severely Polluted </td> <td>Hazardous </td> <td>污染严重的</td> <td>重度污染</td><td>重汚染</td><td>갈색</td><td>Опасное </td> <td style='background-color:#7e0023;color:white;'></td> </tr> </table> <br> <br> 请注意，这是本网站唯一更新过的指示。安卓应用的指示即将更新。 <br> <br> (翻译:Lynn) <br> <br> (<a href='https://aqicn.org/faq/2013-02-07/air-quality-designation-update-to-the-epa-airnow-standard/'>Click here for the english version</a> ) <div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2013-02-03/can-masks-really-filter-the-particulate-matter-as-small-as-pm25/cn/' class='faqlisttitle'><span>口罩真的能够过滤像PM2.5 一样小的微粒物质吗？</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>February 3<sup>rd</sup> 2013</small><div><small>https://aqicn.org/faq/2013-02-03/can-masks-really-filter-the-particulate-matter-as-small-as-pm25/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-02-03/can-masks-really-filter-the-particulate-matter-as-small-as-pm25/cn/"'> <div style='float:right;padding-left:10px;'> <a href='https://www.e-junkie.com/ecom/gb.php?cl=103349&c=ib&aff=217216' target='toto3'> <img src='/images/totobobo/icon-ttle.jpg' border=0> </a> </div> 今天我们来讨论的常问问题条目是有关我昨天发表的 <a href='/faq/2013-02-02/why-is-pm25-often-higher-than-pm10/cn'>PM10 对 PM2.5</a>的。我的朋友Klaus 就防护口罩的有效性提出了质疑。他事实上是在疑惑现代口罩是否可以在时下有效地过滤所有的小的有害的PM2.5微粒物质？ <br> <br> 实际上，这是一个非常好的问题！在北京，如果你不得不戴口罩，那么最好确保口罩真的可以过滤那些有害物质。由于我没有答案来回答他的问题，我给新加坡totobobo口罩制造公司的Francis Chu 发了一封邮件，他马上给出了回答： <blockquote> 是的，我们的口罩能够降低99.85%的0.1微米的微粒。 <br> <br> 下载实验报告可访问链接：<a href='http://totobobo.com/download/F96-NelsonLab-test.pdf' target='toto2'> totobobo.com/download/F96-NelsonLab-test.pdf</a><br> </blockquote> 对于不熟悉微粒大小的读者来说，PM10 指的是小于10微米的颗粒物质，对于PM2.5来说，它指的是小于2.5微米的颗粒物质。因此，过滤掉所有小于0.1微米的物质，意味着它可以过滤掉小于PM2.5 25倍的有害物质！所以，Klaus，不用担心，最新的技术肯定是有效的！ <br> <br> 有关颗粒大小的详细信息，可以参考维基百科网页。如想获知更多空气过滤器如何实际测验的，或者如何比较各种口罩品牌，可以查看totobobo信息丰富的 <a href='http://totobobo.com/blog/2010/01/6-filter-test/'>博客条目</a>。 <br> <br> 如想购买此Totobobo口罩： <ul> <li> 可直接访问Totobobo公司的<a href='https://www.e-junkie.com/ecom/gb.php?cl=103349&c=ib&aff=217216' target='toto3'>官网</a>。 <br> <br> <li> 可在<a href='http://s.taobao.com/search?q=totobobo' target=taobao>淘宝</a>上选择卖家。 </ul> <br> <br> (翻译:Lynn) <br> <br> (<a href='https://aqicn.org/faq/2013-02-03/can-masks-really-filter-the-particulate-matter-as-small-as-pm25/'>Click here for the english version</a> ) <div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2013-02-02/why-is-pm25-often-higher-than-pm10/cn/' class='faqlisttitle'><span>为什么PM2.5的数值经常比PM10高？为什么还需要用PM10？</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>February 2<sup>nd</sup> 2013</small><div><small>https://aqicn.org/faq/2013-02-02/why-is-pm25-often-higher-than-pm10/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-02-02/why-is-pm25-often-higher-than-pm10/cn/"'> 本周我们从Severine P收到了一个很好的相关问题。他问了有关PM2.5与PM10相抵触的问题。 SP在邮件里问道：<br> <blockquote> 我不明白为什么PM2.5 的浓度经常比PM10 的高。<br> 比PM2.5小的不是包括在比PM10小的浓度里面吗？<br> 非常感谢您的回答。<br> </blockquote> SP的问题是完全正确的：PM2.5 用定义来解释，就是比2.5微米小的颗粒，所以它们确实应该被包括在比10微米小的颗粒里面。 <br> <br> 但是假设有关的浓度是不正确的：PM2.5的浓度可以比PM10的浓度小。然而，被修改过的值可以高一些。举个例子，一个PM2.5的空气质量指数为50，它与每平方米15.5微克是一致的。然而，它与PM10的每立方米55微克也是一致的。 <br> <br> 所以，即使PM2.5的每平方米15.5微克浓度全部被加进PM10的浓度里，PM10的空气质量指数依然保持比PM2.5的空气质量指数更低。例如，本周早些时候，东城东四地区的PM10的浓度为366，空气质量指数的结果为216，可是，东城东四地区的PM2.5浓度为348，空气质量指数的结果为398. <br> <br> 为了双重确定我们的理解是对的，我们联系了在世界上享有声誉的空气质量专家，来自 <a href='http://www.urbanemissions.info'>urbanemissions.info</a> 的 <a href='http://www.dri.edu/sarath-guttikunda' target=_>Dr Sarath Guttikunda</a> 博士，她回复到： <blockquote> 你说的这些是对的。差别是由于对于PM2.5和PM10的不同拐点 (<i>break points</i>)，流行病学的数据与PM2.5及PM10浓度的不同幅度是如何关联的。 (<i>how the <a href='http://zh.wikipedia.org/wiki/%E6%B5%81%E8%A1%8C%E7%97%85%E5%AD%A6'>epidemiological</a> data is correlated to each of the fractions</i>) </blockquote> <br> <br> 所以，下一个问题是关于PM10的关联（中肯），尤其是在中国，大多数时候（尤其是被确认过的）都是完全正确的，这空气质量指数中PM2.5是具有显著优势的价值，因此，我们依然需要PM10的检测吗？它还是中肯的吗？此外，当遇到从他出得到了PM10的空气质量指数比PM2.5的高的情况时呢？有关这个问题，我们再次咨询了 <a href='http://www.dri.edu/sarath-guttikunda' target=_>Sarath Guttikunda</a> 博士，他回复到： <blockquote> 现在有新的研究可以提供证据，即PM2.5比PM10更为有害。从身体角度来说，这可以说明，更小的颗粒更有可能进入肺的深处来伤害我们。这也是世界卫生组织（WHO）推动所有的国家拥有PM2.5标准的一个重要原因之一。 <br> <br> 有关问题，当我们进行PM2.5的时候，还需要有PM10浓度吗？是的，我们依然需要。在PM2.5的分数在PM10里提高的时候，对于大多数污染来自交通及燃烧城市，经常被忽视非燃烧源就是再-悬浮尘埃（来自公路尘埃和尘暴），是形成Coarser分数的一部分（从PM2.5到PM10）。如果我们突然停止检测PM10，我们就会忽视这一来源。 <br> <br> 在中国和印度的大多数城市依旧只检测PM10。因此。这也是我们不能从等式里移除的另一个原因。 </blockquote> 非常感谢Sarath Guttikunda博士既迅速又专业的解答。 <br> <br> (翻译:Lynn) <br> <br> ( <a href='/faq/2013-02-02/why-is-pm25-often-higher-than-pm10/'>Click here for the english version</a> ) <p>有关从浓度到 AQI 转换的更多信息，您可以参考<a href='/calculator/cn/'>AQI 计算器</a>以及此<a href='/faq/2015-03-20/a-comparison-of-worldwide-air-quality-scales-part-1/cn/'>AQI 量表说明</a>。</p> (<a href='/faq/2013-02-02/why-is-pm25-often-higher-than-pm10/cn/'>中文版请点击此处</a> ) <div style='display:inline-block;width:50%;border-top:1px solid black;margin-bottom:20px;'></article><article><div><a href='https://aqicn.org/faq/2013-01-19/shanghai-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shanghai/cn/' class='faqlisttitle'><span>上海PM2.5主要空气质量指数更新：比较上海三个监测站的PM2.5数据</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>January 19<sup>th</sup> 2013</small><div><small>https://aqicn.org/faq/2013-01-19/shanghai-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shanghai/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-01-19/shanghai-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shanghai/cn/"'> 上海空气质量指数目前以 <a href='https://aqicn.org/city/shanghai/us-consulate/cn/'>上海美国总领事馆</a>、 <a href='https://aqicn.org/city/shanghai/jinganjiancezhan/cn/'>静安监测站</a>和 <a href='https://aqicn.org/city/shanghai/luwanshizhuanfuxiao/cn/'>上海师范专科学校附属小学</a>三个监测站的最大值为基础。 <br> <br> 第一个监测站主要由 <a href='http://shanghai.usembassy-china.org.cn/airmonitor.html' target=_>上海美国总领事馆</a>维护，后两个监测站的数据由 <a href='http://www.semc.gov.cn/' target=_>上海市环境监测中心</a>提供，都是政府管理的监测中心。 <br> <br> 如担心一些检测站所报道的数据比其他的网站的数值低，可参考以下的图表；这些图表显示了以上提到过的三个监测站最近5天有关的监测数据： <br> <br> <br><center><a href='https://aqicn.org/faq/2013-01-19/shanghai-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-shanghai/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2013-01-11/chengdu-pm25-main-aqi-update-comparative-pm25-data-for-2-measurement-stations-in-chengdu/cn/' class='faqlisttitle'><span>成都 PM <sub>2.5</sub>主要 AQI 更新：成都 2 个测量站 PM <sub>2.5</sub>数据对比</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>January 11<sup>th</sup> 2013</small><div><small>https://aqicn.org/faq/2013-01-11/chengdu-pm25-main-aqi-update-comparative-pm25-data-for-2-measurement-stations-in-chengdu/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-01-11/chengdu-pm25-main-aqi-update-comparative-pm25-data-for-2-measurement-stations-in-chengdu/cn/"'> For more information, please refer to the Shanghai AQI update explanations. The following graphics show the relative PM<sub>2.5</sub> AQI data for Chengdu stations on which the overall Chengu AQI is based. <br><br> <br><center><a href='https://aqicn.org/faq/2013-01-11/chengdu-pm25-main-aqi-update-comparative-pm25-data-for-2-measurement-stations-in-chengdu/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><article><div><a href='https://aqicn.org/faq/2013-01-11/beijing-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-beijing/cn/' class='faqlisttitle'><span>北京 PM <sub>2.5</sub>主要 AQI 更新：北京 3 个测量站 PM <sub>2.5</sub>数据对比</span></a></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><small style='color:#888;'>January 11<sup>th</sup> 2013</small><div><small>https://aqicn.org/faq/2013-01-11/beijing-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-beijing/cn/</small></div><div style='height:1px;background-color:#aaaaaa;width:80px;margin-top:5px;'></div><div class='entry-content;' style='min-height:250px;cursor:pointer;' onclick='window.location="https://aqicn.org/faq/2013-01-11/beijing-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-beijing/cn/"'> For more information, please refer to the Shanghai AQI update explanations. The following graphics show the relative PM<sub>2.5</sub> AQI data for Beijing stations on which the overall Beijing AQI is based. <br><br> <br><center><a href='https://aqicn.org/faq/2013-01-11/beijing-pm25-main-aqi-update-comparative-pm25-data-for-3-measurement-stations-in-beijing/cn/' class='faq-read-more'><i18n>Read the full article</i18n></a></center><br><br></article><br><br><br></div></div></div><a name="infoaqi"></a><div class='h1section h1section-divider'><div class='h1section-rainbow'><div></div><div></div><div></div><div></div><div></div></div><h1><div id='h1header2' style='padding:2px;font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;;' i18n>关于空气质量与空气污染指数</div></h1></div><script type='text/javascript'> ; if (!isMobileUA) { fitLine('#h1header2',.88,{maxfs:45}); }; </script><div class='whitebody' style='font-family:"Noto Serif",Cambria,"Palatino Linotype","Book Antiqua","URW Palladio L",serif;'><div class='section-outer'><div class='section-content' ><center>本网站采用的污染指数和颜色与EPA是完全相同的。 EPA的指数可以从<a href='http://zh.wikipedia.org/wiki/%E7%A9%BA%E6%B0%94%E8%B4%A8%E9%87%8F%E6%8C%87%E6%95%B0>维基百科</a>和<a href='http://www.airnow.gov/index.cfm?action=aqibasics.aqi'> AirNow</a>上查到<br><br><style type="text/css">#legend-full table.infoaqitable {line-height: 1.5;background-color: white;max-width: 1000px;width: 95%;margin: 0px;border: 1px solid black;cursor: pointer;}#legend-full table.infoaqitable td {padding: 5px;font-size: 15px;text-shadow: none;}#legend-full .aqiwtxt {color: #ffffff;}#legend-full .aqibtxt {color: #000000;}@media only screen and (max-width: 800px) {#legend-full table.infoaqitable {width: 98%;}}@media only screen and (max-width: 800px) {#legend-full table.infoaqitable td {display: block;}#legend-full table.infoaqitable td:nth-child(1) {display: inline-block;font-size: 1.2em;}#legend-full table.infoaqitable td:nth-child(2) {display: inline-block;font-weight: 800;font-size: 1.2em;}}</style><div id='legend-full' onclick='window.location="/scale/"'><table class="infoaqitable"><tbody><tr><td style="text-align:center;">空气质量指数</td><td style="text-align:center;">空气质量指数级别（状况）及表示颜色</td><td>对健康影响情况</td><td>建议采取的措施</td></tr><tr style="background-color:#009966;color:white"><td nowrap="true">0 - 50</td><td style="text-align:center;">一级（优）</td><td>空气质量令人满意，基本无空气污染</td><td>各类人群可正常活动</td></tr><tr style="background-color:#ffde33"><td nowrap="true">51 -100</td><td style="text-align:center;">二级（良）</td><td>空气质量可接受，但某些污染物可能对极少数异常敏感人群健康有较弱影响</td><td>极少数异常敏感人群应减少户外活动</td></tr><tr style="background-color:#ff9933;color:white"><td nowrap="true">101-150</td><td style="text-align:center;">三级（轻度污染）</td><td>易感人群症状有轻度加剧，健康人群出现刺激症状</td><td>儿童、老年人及心脏病、呼吸系统疾病患者应减少长时间、高强度的户外锻炼</td></tr><tr style="background-color:#cc0033;color:white"><td nowrap="true">151-200</td><td style="text-align:center;color:white">四级（中度污染）</td><td>进一步加剧易感人群症状，可能对健康人群心脏、呼吸系统有影响</td><td>儿童、老年人及心脏病、呼吸系统疾病患者避免长时间、高强度的户外锻炼，一般人群适量减少户外运动</td></tr><tr style="background-color:#660099;color:white"><td nowrap="true">201-300</td><td style="text-align:center;color:white">五级（重度污染）</td><td>心脏病和肺病患者症状显著加剧，运动耐受力降低，健康人群普遍出现症状</td><td>儿童、老年人及心脏病、肺病患者应停留在室内，停止户外运动，一般人群减少户外运动</td></tr><tr style="background-color:#7e0023;color:white"><td nowrap="true">300+</td><td style="text-align:center;color:white">六级（严重污染）</td><td>健康人群运动耐受力降低，有明显强烈症状，提前出现某些疾病</td><td>儿童、老年人和病人应停留在室内，避免体力消耗，一般人群避免户外活动</td></tr></tbody></table>(参考详见<a href='http://zh.wikipedia.org/wiki/%E7%A9%BA%E6%B0%94%E8%B4%A8%E9%87%8F%E6%8C%87%E6%95%B0'>http://zh.wikipedia.org/wiki/空气质量指数</a>)<br></div><br>如果你想了解更多有关空气质量与污染，详见<a href='http://en.wikipedia.org/wiki/Air_quality'>维基百科</a>或者<a href='http://www.airnow.gov/index.cfm?action=aqibasics.aqi'> AirNow</a><br><br>有关健康建议详见北京的Richard Saint Cyr MD医生的博客：<a href='http://www.myhealthbeijing.com/'>www.myhealthbeijing.com</a><br><br></center></div></div></div><center><br><ins class="adsbygoogle" style="display:block"data-ad-client="ca-pub-0281575029452656"data-ad-slot="2455076269"data-ad-format="auto"></ins><script>(adsbygoogle = window.adsbygoogle || []).push({});</script><style type='text/css'>.usage-notice {line-height:1.5;max-width:95%;width:1000px;margin-top:10px;padding:5px;font-size: 15px;background-color:#ffffff;text-shadow: 1px 1px 1px white;-webkit-box-shadow: 1px 1px 8px -3px rgba(0,0,0,0.3);}</style><div class="textshadowwhite usage-notice" style=''><b>注意事项</b>: 所有空气质量数据在发布时均未经验证，并且为了保证数据质量，这些数据可能随时被修改，恕不另行通知。 <a href='https://aqicn.org'>世界空气质量指数</a>项目在编制此信息的内容时已经运用了所有合理的技能和谨慎，在任何情况下<a href =“https://aqicn.org“>世界空气质量指数</a>项目团队或其代理人将不会为由于提供此数据而直接或间接引起的伤害、合同损失、侵权及其他任何损失负责。</div><br><br><br></center><div id="fixed-footer-marker" class="locked"></div><div id="floating-footer" class="footer-overlay floating-footer-overlay footer"></div><div id="fixed-footer" class="footer"><div id="footer-overlay" class="footer-overlay"></div><br><br><center><div id='fixed-footer-menu-buttons-with-text' style='max-width:80%;margin-bottom:20px;display:none;'><a href='javascript:go2home();' class='menubar-text'><div class='fixed-menubar-button'><div class='sprite-isprt-web-home'></div>首页</div></a> <a href='/here/cn/' class='menubar-text'><div class='fixed-menubar-button'><div class='sprite-isprt-web-geofencing'></div>这里</div></a> <a href='/map/world/cn/' class='menubar-text'><div class='fixed-menubar-button'><div class='sprite-isprt-web-globe'></div>地图</div></a> <a href='/mask/cn/' class='menubar-text'><div class='fixed-menubar-button'><div class='sprite-isprt-web-dustmask'></div>口罩</div></a> <a href='/faq/cn/' class='menubar-text'><div class='fixed-menubar-button'><div class='sprite-isprt-web-faq'></div>常问问题</div></a> <a href='/city/all/cn/' class='menubar-text'><div class='fixed-menubar-button'><div class='sprite-isprt-web-search'></div>搜索</div></a> <a href='/contact/cn/' class='menubar-text'><div class='fixed-menubar-button'><div class='sprite-isprt-web-talk'></div>联系</div></a> <a href='/links/cn/' class='menubar-text'><div class='fixed-menubar-button'><div class='sprite-isprt-web-link'></div>链接</div></a> </div><div class='footercolumnout'><div class='footercolumn1 footercolumn'><h3 i18n='generic'>About This Project</h3><br><li><a href='/contact/cn/' i18n='generic'>联系世界的空气质量指数项目团队</a></li><li><a href='/media/cn/' i18n='generic'>Press And Media Kit</a></li><br><h3><a href='/research/cn/' i18n='generic'>air quality research</a></h3><br><li><a href='/faq/cn/' i18n='generic'>Air Quality Knowledge Base And Articles</a></li><li><a href='/research/cn/' i18n='generic'>Air Quality Experimentation</a></li><li><a href='/sensor/cn/' i18n='generic'>Air Quality Sensors Analysis</a></li><br><h3><a href='/faq/cn/' i18n='generic'>常问问题</a></h3><br><li><a href='/sources/cn/' i18n='generic'>Air Quality Data source</a></li><li><a href='/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/cn/' i18n='generic'>Air Quality Index Calculation</a></li><li><a href='/forecast/cn/' i18n='generic'>Air Quality Forecasting</a></li><li><a href='/products/cn/' i18n='generic'>Air Quality Products (masks, Monitors…)</a></li><li><a href='/api/cn/' i18n='generic'>API (Application Programming Interface)</a></li><li><a href='/data-platform/cn/' i18n='generic'>Historical Data Platform</a></li></div><div class='footercolumn2 footercolumn'><h3>Credits</h3><br><li><a href='/sources/cn/' i18n='generic'>All the EPA in the world for their excellent work in maintaining, measuring and providing Air Quality information to the world citizens</a></li><li><a href='http://www.maxmind.com' target=_ i18n='generic'>This product includes GeoLite2 data created by MaxMind, available from maxmind.com.</a><li><a href='http://geonames.org' target=_ i18n='generic'>This product includes GeoNames city information, available from geonames.org.</a><li><a href="http://openweathermap.org/" target="__s" i18n='generic'>Open Weather Map, combined with qweather™ improvement algorithm</a><li><a href='http://wxqa.com' target="__s" i18n='generic'>Citizen Weather Observer Program</a> via <a href='https://cwop.waqi.info' target="__s">cwop.waqi.info</a><li><a href="http://atmosphere.copernicus.eu/" target="__s" i18n='generic'>Contains modified Copernicus Atmosphere Monitoring Service Information</a><li><a href="https://www.flaticon.com/" target="__s" title="Flaticon" i18n='generic'>Some of the icons made by Freepik from www.flaticon.com</a><li><a href="https://locationiq.com/" target="__s" title="location IQ" i18n='generic'>Reverse geocoding by locationiq.com</a><li><a href="https://www.openstreetmap.org/copyright" target="__s" title="Open Street Map" i18n='generic'>Base map and data from OpenStreetMap.</a></div><div class='footercolumn3 footercolumn'><center>© 2008-2025<br><a href='https://waqi.info'><i18n:generic>The World Air Quality Index Project</i18n></a><br><br><img src='https://waqi.info/icons/logo.png?_=1742515352' class='footer-logo' alt='the World Air Quality Index project logo' border=0 height=100>  <img class='async-img' data-src='https://aqicn.org/images/MadeInBJ.png?_=1742515352' class='madeinbjlogo' alt='made in 北京' border=0><br><br></center></div></div></center><div style='clear:both'></div><div style='clear:both;'></div><center><div id='xatzcaqd'></center><br><div id='mailing-list-footer'><style type="text/css">#mailing-list-footer .mailing-list-subscription {text-shadow: #000 1px 1px 1px;font-size: 15px;color: white;}</style><script>var i18nTexts=(i18nTexts||[]);i18nTexts.push({"wa.KqlOlZrllRNJ+7u88XlbL2RQFwo=":"\u54ce\u5440\uff01\u51fa\u4e8b\u4e86\u3002\u8bf7\u7a0d\u540e\u518d\u8bd5\u3002","wa.ds6QyCdIOHG4hhIEHD2rFqI\/WwI=":"\u6ce8\u518c\u6211\u4eec\u7684\u514d\u8d39\u6bcf\u6708\u90ae\u4ef6\u5217\u8868\uff0c\u5e76\u5728\u6709\u65b0\u6587\u7ae0\u65f6\u6536\u5230\u901a\u77e5\u3002","wa.Xi+TKw0nK3I5533XVrPPC2U4EGA=":"\u4f60\u7684\u90ae\u4ef6","wa.P6QFTyFPD4Bj2PtEU75l1GDj4ww=":"\u63d0\u4ea4","wa.FoXcvD6sGbwj\/zOhqhL39XuXQsA=":"\u6b63\u5728\u6ce8\u518c\u60a8\u7684\u7535\u5b50\u90ae\u4ef6\uff0c\u8bf7\u7a0d\u5019"})</script><script src='/webapp/dist/mailing-dyn.b37d52498ecc6e0dde16.js?_=1737642178' type='text/javascript'></script></div><center style='clear:both;'><br><small>This page has been generated on Friday, Mar 21st 2025, 08:02 am CST from jp2n</small><br><small><span id='gentime'></span></small><br><br></center><br><br></div><div id='settingsdiv-outer'><div id='settingsdiv'><div onclick='settingsMenu.close()'><svg height="24px" viewBox="0 0 512 512" width="24px" style='float:right;fill:white;'><path d="M74.966,437.013c-99.97-99.97-99.97-262.065,0-362.037c100.002-99.97,262.066-99.97,362.067,0 c99.971,99.971,99.971,262.067,0,362.037C337.032,536.998,174.968,536.998,74.966,437.013z M391.782,120.227 c-75.001-74.985-196.564-74.985-271.534,0c-75.001,74.985-75.001,196.55,0,271.535c74.97,74.986,196.533,74.986,271.534,0 C466.754,316.775,466.754,195.212,391.782,120.227z M188.124,369.137l-45.251-45.266l67.876-67.877l-67.876-67.876l45.251-45.267 L256,210.743l67.877-67.892l45.25,45.267l-67.876,67.876l67.876,67.877l-45.25,45.266L256,301.245L188.124,369.137z" /></svg><h2>设置</h2></div><br><center><div id='settings-lang'>选择语言：<br><div class='sprite-isprt-web-gb flag'></div><div class='sprite-isprt-web-cn flag'></div><div class='sprite-isprt-web-jp flag'></div><div class='sprite-isprt-web-kr flag'></div><div class='sprite-isprt-web-pl flag'></div><br><select onchange='location.href = this.value'><option value='https://aqicn.org/faq/' >English - 英语</option><option value='https://aqicn.org/faq/cn/' selected>简体中文</option><option value='https://aqicn.org/faq/jp/' >日本</option><option value='https://aqicn.org/faq/es/' >español - 西班牙人</option><option value='https://aqicn.org/faq/kr/' >한국의 - 韩国</option><option value='https://aqicn.org/faq/ru/' >русский - 俄</option><option value='https://aqicn.org/faq/hk/' >繁體中文 - 繁体中文</option><option value='https://aqicn.org/faq/fr/' >Francais - 法国人</option><option value='https://aqicn.org/faq/pl/' >Polski - Polish</option><option value='https://aqicn.org/faq/de/' >Deutsch - German</option><option value='https://aqicn.org/faq/pt/' >Português - Portuguese</option><option value='https://aqicn.org/faq/vn/' >Tiếng Việt - Vietnamese</option><option value='https://aqicn.org/faq/it/' >Italiano - Italian</option><option value='https://aqicn.org/faq/id/' >bahasa Indonesia - Indonesian</option><option value='https://aqicn.org/faq/nl/' >Nederlands - Dutch</option><option value='https://aqicn.org/faq/fa/' >فارسی - Persian</option><option value='https://aqicn.org/faq/th/' >ภาษาไทย - Thai</option><option value='https://aqicn.org/faq/hu/' >Magyar - Hungarian</option><option value='https://aqicn.org/faq/el/' >Ελληνικά - Greek</option><option value='https://aqicn.org/faq/ro/' >Română - Romanian</option><option value='https://aqicn.org/faq/bg/' >български - Bulgarian</option><option value='https://aqicn.org/faq/ur/' >اردو - Urdu</option><option value='https://aqicn.org/faq/hi/' >हिंदी - Hindi</option><option value='https://aqicn.org/faq/ar/' >العربية - Arabic</option><option value='https://aqicn.org/faq/sr/' >Српски - Serbian</option><option value='https://aqicn.org/faq/bn/' >বাংলা - Bangla</option><option value='https://aqicn.org/faq/bs/' >босански - Bosnian</option><option value='https://aqicn.org/faq/hr/' >hrvatski - Croatian</option><option value='https://aqicn.org/faq/tr/' >Türkçe - Turkish</option><option value='https://aqicn.org/faq/uk/' >українська - Ukrainian</option><option value='https://aqicn.org/faq/cs/' >čeština - Czech</option><option value='https://aqicn.org/faq/be/' >беларускі - Belarusian</option><option value='https://aqicn.org/faq/km/' >ខ្មែរ - Khmer</option><option value='https://aqicn.org/faq/lo/' >ລາວ - Lao</option></select></div><br><table><tr><td><center><i>Temperature unit:</i><br><span style='font-size:18px'><span style='display:;' id='settings-temp-label-on'>Celcius</span><span style='display:none;' id='settings-temp-label-off'>Fahrenheit</span></span></center></td><td><div class="onoffswitch" onclick='settingsMenu.click("temp")'><input type="checkbox" name="onoffswitch" class="onoffswitch-checkbox" id="settings-temp" checked><label class="onoffswitch-label" for="myonoffswitch"><span class="onoffswitch-inner"></span><span class="onoffswitch-switch"></span></label></div></table></center><br></div><div style='display:none;height:0px;' id='settingsdiv-arrow'><div style='width: 0; height: 0; border: 7px solid transparent;top:0px;border-top: 7px solid #fff;position:relative;;margin-left:100px;'></div></div></div><link rel='stylesheet' type='text/css' href='https://aqicn.org/air-cache/generic/scripts/dist/navmenu.css?_=20250118.191236' /><script async src='https://aqicn.org/air-cache/generic/scripts/dist/navmenu.js?_=20250121.194619' type='text/javascript'></script><script type="text/javascript"> fitLine(".link",.9); </script><script src='https://aqicn.org/air-cache/jquery-3.7.1.min.js?_=20250116.195014' type='text/javascript'></script><script type="text/javascript">function initTime(){if (isMobileUA) return;function setTimeText(){var minutes = new Date().getMinutes();var hours = new Date().getHours();var time = ( hours < 10 ? "0" : "" ) + hours;time += ":"+( minutes < 10 ? "0" : "" ) + minutes;var ot = document.getElementById("ClockTime");if (ot) ot.innerHTML = time;}setInterval( function() { setTimeText() }, 1000*60*15 );setTimeText();};aqi18n.register('aqi-implication-0-50',"\u7a7a\u6c14\u8d28\u91cf\u88ab\u8ba4\u4e3a\u662f\u4ee4\u4eba\u6ee1\u610f\u7684\uff0c\u7a7a\u6c14\u6c61\u67d3\u5f88\u5c0f\u6216\u6ca1\u6709\u98ce\u9669");aqi18n.register('aqi-level-0-50',"\u597d");aqi18n.register('aqi-implication-50-100',"\u7a7a\u6c14\u8d28\u91cf\u53ef\u4ee5\u63a5\u53d7; \u7136\u800c\uff0c\u5bf9\u4e8e\u6781\u5c11\u6570\u7a7a\u6c14\u6c61\u67d3\u5f02\u5e38\u654f\u611f\u7684\u4eba\u7fa4\u6765\u8bf4\uff0c\u4e00\u4e9b\u6c61\u67d3\u7269\u4f9d\u7136\u53ef\u80fd\u5f71\u54cd\u5065\u5eb7\u3002");aqi18n.register('aqi-level-50-100',"\u4e2d\u7b49");aqi18n.register('aqi-implication-100-150',"\u654f\u611f\u4eba\u7fa4\u53ef\u80fd\u4f1a\u53d7\u5230\u5065\u5eb7\u5f71\u54cd\u3002 \u666e\u901a\u5927\u4f17\u4e0d\u592a\u53ef\u80fd\u53d7\u5230\u5f71\u54cd\u3002");aqi18n.register('aqi-level-100-150',"\u5bf9\u654f\u611f\u7fa4\u4f53\u4e0d\u5065\u5eb7");aqi18n.register('aqi-level-100-150-html',"<div style='font-size:66%'>\u5bf9\u654f\u611f\u7fa4\u4f53\u4e0d\u5065\u5eb7<\/div>");aqi18n.register('aqi-implication-150-200',"\u6240\u6709\u4eba\u90fd\u53ef\u80fd\u4f1a\u5f00\u59cb\u611f\u53d7\u5230\u5065\u5eb7\u5f71\u54cd; \u654f\u611f\u4eba\u7fa4\u53ef\u80fd\u4f1a\u611f\u53d7\u5230\u66f4\u4e25\u91cd\u7684\u5065\u5eb7\u5f71\u54cd");aqi18n.register('aqi-level-150-200',"\u4e0d\u5065\u5eb7\u7684");aqi18n.register('aqi-implication-200-300',"\u7d27\u6025\u60c5\u51b5\u4e0b\u7684\u5065\u5eb7\u8b66\u544a\u3002 \u6240\u6709\u4eba\u90fd\u66f4\u6709\u53ef\u80fd\u53d7\u5230\u5f71\u54cd\u3002");aqi18n.register('aqi-level-200-300',"\u975e\u5e38\u4e0d\u5065\u5eb7");aqi18n.register('aqi-level-200-300-html',"<div style='font-size:80%'>\u975e\u5e38\u4e0d\u5065\u5eb7<\/div>");aqi18n.register('aqi-implication-300-500',"\u5065\u5eb7\u8b66\u62a5\uff1a\u6bcf\u4e2a\u4eba\u90fd\u53ef\u80fd\u4f1a\u53d7\u5230\u66f4\u4e25\u91cd\u7684\u5065\u5eb7\u5f71\u54cd");aqi18n.register('aqi-level-300-500',"\u6709\u5bb3");aqi18n.register('updated',"\u66f4\u65b0");</script><script type="text/javascript">["preInitPage","initTime"].forEach(function(f){if (window[f]) { try { window[f](); } catch (e) { loge("error in "+f,e); }} });</script><script src='/jscripts/moment/bundle.min.js?_=20200103.150752&type=script'></script><script src='https://aqicn.org/air-cache/tingle/0.15.1/tingle.min.js?_=20191109.130307' type='text/javascript'></script><script type="text/javascript">document.addEventListener("DOMContentLoaded", function() { ["Page","HeadSearch","Search","Notify","Geolocate","AqiForecast","Download","Sharing","Page2"].forEach(function(f){f = "init"+f;if (window[f]) { try { window[f](); } catch (e) { loge ("error in "+f,e,e.stack);}; }});if (typeof ntfOnInit != "undefined") ntfOnInit();});</script><script type="text/javascript">(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');ga('create', 'UA-28507883-1', 'auto');ga('send', 'pageview');try {var images = document.querySelectorAll('.async-img');var config = { rootMargin: '50px 0px', threshold: 0.01};function preloadImage(img) {img.src = img.dataset.src; }function onIntersection(entries) {entries.forEach(function(entry) {if (entry.intersectionRatio > 0) {observer.unobserve(entry.target);preloadImage(entry.target);}})}var observer = new IntersectionObserver(onIntersection, config);images.forEach(function(image){observer.observe(image)});} catch (e) {} </script></body></html>