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title='Vietnamese' class='sprite-isprt-web-vn flag-vi'></div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//it'><div title='Italian' class='sprite-isprt-web-it flag-it'>🇮🇹</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//id'><div title='Indonesian' class='sprite-isprt-web-id flag-id'>🇮🇩</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//nl'><div title='Dutch' class='sprite-isprt-web-nl flag-nl'>🇳🇱</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//fa'><div title='Persian' class='sprite-isprt-web-ir flag-fa'>🇮🇷</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//th'><div title='Thai' class='sprite-isprt-web-th flag-th'>🇹🇭</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//hu'><div title='Hungarian' class='sprite-isprt-web-hu flag-hu'>🇭🇺</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//el'><div title='Greek' class='sprite-isprt-web-gr flag-el'>🇬🇷</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//ro'><div title='Romanian' class='sprite-isprt-web-ro flag-ro'>🇷🇴</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//bg'><div title='Bulgarian' class='sprite-isprt-web-bg flag-bg'>🇧🇬</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//ur'><div title='Urdu' class='sprite-isprt-web-pk flag-ur'>🇵🇰</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//hi'><div title='Hindi' class='sprite-isprt-web-in flag-hi'>🇮🇳</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//ar'><div title='Arabic' class='sprite-isprt-web-ae flag-ar'>🇦🇪</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//sr'><div title='Serbian' class='sprite-isprt-web-rs flag-sr'>🇷🇸</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//bn'><div title='Bangla' class='sprite-isprt-web-bd flag-bn'>🇧🇩</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//bs'><div title='Bosnian' class='sprite-isprt-web-ba flag-bs'>🇧🇦</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//hr'><div title='Croatian' class='sprite-isprt-web-hr flag-hr'>🇭🇷</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//tr'><div title='Turkish' class='sprite-isprt-web-tr flag-tr'>🇹🇷</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//uk'><div title='Ukrainian' class='sprite-isprt-web-ua flag-uk'>🇺🇦</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//cs'><div title='Czech' class='sprite-isprt-web-cz flag-cs'>🇨🇿</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//be'><div title='Belarusian' class='sprite-isprt-web-by flag-be'>🇧🇾</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//km'><div title='Khmer' class='sprite-isprt-web-kh flag-km'>🇰🇭</div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast/' class='lang-en'><div class='item'><div class='flag sprite-isprt-web-gb'></div><span class='name'>英語 <span>- English</span></span></div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//cn' class='lang-zh-CN'><div class='item'><div class='flag sprite-isprt-web-cn'></div><span class='name'>簡體中文 <span>- 简体中文</span></span></div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//kr' class='lang-ko'><div class='item'><div class='flag sprite-isprt-web-kr'></div><span class='name'>韓國 <span>- 한국의</span></span></div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//hk' class='lang-zh-TW'><div class='item'><div class='flag sprite-isprt-web-hk'></div><span class='name'>繁體中文</span></div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//fr' class='lang-fr'><div class='item'><div class='flag sprite-isprt-web-fr'></div><span class='name'>法國人 <span>- Francais</span></span></div></a><a href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//be' class='lang-be'><div class='item'><div class='flag sprite-isprt-web-by'>🇧🇾</div><span 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href='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast/hk/'>aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast/hk/</a></i><br><div class='entry-content' ng-controller='MainController as ctrl'> <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'>地面臭氧空氣品質指數計算剛剛更新，以遵循即時投射概念，即報告現在的污染，而不是前幾個小時的污染。有關 Instant Cast 的更多信息，請參閱這篇<a href='/faq/2015-03-15/air-quality-nowcast-a-beginners-guide/hk/'>文章</a>。</p> <p>臭氧指數的計算現在使用每小時讀數，而不是之前的 8 小時平均值，但對於 AQI 低於 100 的情況，仍採用相同的 8 小時 AQI 斷點公式。不使用先前計算 8 小時平均濃度<a href='http://www.arb.ca.gov/regact/area06/appe.pdf'>的程式</a>更多即時報告。 AQI 高於 100，則使用正常的 1 小時臭氧斷點（而在此之前，AQI 高於 100 被定義為 1 小時和 8 小時讀數的最大值）。</p> <br> <p>右圖總結了正在使用的斷點。綠線是與世界空氣品質指數項目中使用的「臭氧即時投射」斷點相對應的線</p> <table width=100%> <tr> <td> <table class='fetching' style=''><tr style='min-height:30px;background-color:#eee;line-height:1.3;'><td nowrap width=20% style='height:30px;'>Index Values<td><center>Color coding<td width=20% style='' nowrap>AQI Category</td><td nowrap width=25% >1-hour<br>breakpoints<br><small>(ppm)<td nowrap width=25% >8-hours<br>breakpoints<br><small>(ppm)<td nowrap width=25% >8-hours breakpoints<br><small>proposed new<br>standard from US EPA<tr style='min-height:30px;background-color:;line-height:1.3;'><td nowrap width=20% style='height:30px;'>0 - 50<td><center><div style='width:30px;height:18px;background:#009966;color:#ffffff;'></div><td width=20% style='' nowrap>Good</td><td nowrap width=25% >-<td nowrap width=25% >0 - 60<td nowrap width=25% >0 - 50<tr style='min-height:30px;background-color:;line-height:1.3;'><td nowrap width=20% style='height:30px;'>51 - 100<td><center><div style='width:30px;height:18px;background:#ffde33;color:#000000;'></div><td width=20% style='' nowrap>Moderate</td><td nowrap width=25% >-<td nowrap width=25% >60 - 75<td nowrap width=25% >50 - 65<tr style='min-height:30px;background-color:;line-height:1.3;'><td nowrap width=20% style='height:30px;'>101 – 150<td><center><div style='width:30px;height:18px;background:#ff9933;color:#000000;'></div><td width=20% style='' nowrap>Unhealthy<br><small>for Sensitive Groups</td><td nowrap width=25% >125 - 165<td nowrap width=25% >75 – 95<td nowrap width=25% >65 - 85<tr style='min-height:30px;background-color:;line-height:1.3;'><td nowrap width=20% style='height:30px;'>151 – 200<td><center><div style='width:30px;height:18px;background:#cc0033;color:#ffffff;'></div><td width=20% style='' nowrap>Unhealthy</td><td nowrap width=25% >165 - 205<td nowrap width=25% >95 – 115<td nowrap width=25% >85 - 105<tr style='min-height:30px;background-color:;line-height:1.3;'><td nowrap width=20% style='height:30px;'>201 – 300<td><center><div style='width:30px;height:18px;background:#660099;color:#ffffff;'></div><td width=20% style='' nowrap>Very Unhealthy</td><td nowrap width=25% >205 - 405<td nowrap width=25% >115 – 375<td nowrap width=25% >105 - 200<tr style='min-height:30px;background-color:;line-height:1.3;'><td nowrap width=20% style='height:30px;'>301 – 500<td><center><div style='width:30px;height:18px;background:#7e0023;color:#ffffff;'></div><td width=20% style='' nowrap>Hazardous</td><td nowrap width=25% >405 - 505<td nowrap width=25% >-<td nowrap width=25% >-</table><td> <div id='ozonescale'></div> </table> <p>美國環保署 (EPA) 基於有關臭氧影響的廣泛科學證據（<a href='http://www.epa.gov/airquality/ozonepollution/pdfs/20141125proposal.pdf'>更多資訊</a>），提議加強地面臭氧的國家環境空氣品質標準 (NAAQS)。這個新標準（上圖中以灰色繪製）僅適用於 8 小時平均斷點，並且由於尚未獲得批准 - 它不用於“Ozone Instant Cast”斷點。</p> <center>oOo</center> <p>對於有興趣了解該標度與其他國家使用的標度相比如何的人，需要注意的第一個要點是標度使用的濃度單位可能會有所不同：對於美國 EPA，臭氧濃度以 ppm 表示（每百萬顆粒物），而對於許多其他國家，包括印度和中國，它以µg/m <sup>3</sup>表示；</p> <p>因此，比較尺度的第一步是使用初級濃度單位。在這種情況下，ppm 保留為主要單位。 µg/m <sup>3</sup>換算；有點簡單，就是將粒子數乘以臭氧分子質量乘以空氣密度。</p> <p>空氣密度取決於環境溫度和大氣壓力，但為了簡化，通常使用 25 攝氏度環境溫度和 1 大氣壓的假設。在這些條件下，使用以下公式進行轉換：</p> <center> <pre style='border:1px solid black;display:inline-block;padding:3px;background-color:#f8f8f8;'>Ozone Concentration (ppb) = 2.1414 x Ozone Concentration (µg/m3)</pre> </center> <p>現在可以在相同的 ppm 刻度上比較這些刻度，下面的兩張圖顯示了 8 小時和 1 小時各自的刻度。因此，正如之前多次看到的那樣，在美國以外使用的秤實際上比在美國使用的秤安全得多！</p> <script src='/air/view/faq/images/aqi-scales/scales-viewer.min.js?_=1555547488'></script><link href='/air/view/faq/images/aqi-scales/scales-viewer.css?_=1555547488' rel='stylesheet'/> <table width=100% id='pm-table'> <tr> <td> <div id='aqi-scales'></div> <td> <div id='ozonescalefull'></div> </table> <style type="text/css"> path { stroke: steelblue; fill: none; } .line1h { stroke: blue; stroke-width: 3; } .line8h { stroke: red; stroke-width: 3; } .line8hnew { stroke: grey; stroke-width: 3 } .lineic { stroke-width: 10; stroke: #2c2; } .axis path, .axis line { fill: none; font-size: 12px; stroke: black; shape-rendering: crispEdges; } .axis { font-size: 12px; } .axis-label { font-size: 15px; fill: #888; } .axis-legend { font-size: 12px; } .axis-legend-small { font-size: 8px; } .circle { stroke: white; stroke-width: 1.5; } </style> <script src="/jscripts/forecast/d3.v3.min.js"></script> <script type="text/javascript"> d3.cursor = function() { var line = { h: d3.select("body").append("div").attr("class", "line") .style("position", "fixed") .style("top", 0).style("bottom", 0) .style("display", "none").style("width", "1px") .style("background-color", "#888") .style("pointer-events", "none"), v: d3.select("body").append("div").attr("class", "line") .style("position", "fixed") .style("left", 0).style("right", 0) .style("display", "none").style("height", "1px") .style("background-color", "#888") .style("pointer-events", "none") }; this.onmousemove = function() { line.h.style("display", "").style("left", d3.event.x + "px"); line.v.style("display", "").style("top", d3.event.y + "px"); }; this.onmouseout = function() { line.v.style("display", "none"); line.h.style("display", "none"); }; return this; }; function AqiGraph(elt, w, h, opt) { this.opt = opt = opt || {}; var margin = { top: 30, right: 20, bottom: 20, left: 30 }, width = this.width = w - margin.left - margin.right, height = this.height = h - margin.top - margin.bottom; var cursor = new d3.cursor(); this.svg = d3.select("#" + elt) .on("mousemove", function(d, i) { cursor.onmousemove(); }) .on("mouseout", function(d, i) { cursor.onmouseout(); }) .append('svg') .attr("width", width + margin.left + margin.right) .attr("height", height + margin.top + margin.bottom) .append('g') .attr("transform", "translate(" + margin.left + "," + margin.top + ")"); this.x = d3.scale.linear().domain([0, opt.maxc || 390]).rangeRound([0, width]); this.y = d3.scale.linear().domain([0, opt.maxaqi || 320]).rangeRound([height, 0]); this.count = 0; this.labels = []; }; AqiGraph.prototype.plot = function(scale, opt) { var self = this; var n = this.count++; var valueline = d3.svg.line() .x(function(d) { return self.x(d.c / (opt.conv || 1)); }) .y(function(d) { return self.y(d.a); }); this.svg.append("path") .attr("class", "line") .style("stroke-width", opt.w) .style("stroke", opt.color) .attr("d", valueline(scale)); this.svg.selectAll("circle" + n) .data(scale) .enter().append("circle") .attr("class", "circle") .attr("cx", function(d) { return self.x(d.c / (opt.conv || 1)); }) .attr("cy", function(d) { return self.y(d.a); }) .attr("r", function(d) { return opt.r || (opt.w * 1.5); }) .style("fill", function(d) { return opt.color; }); this.labels.push(opt); }; AqiGraph.prototype.finish = function() { var xAxis = d3.svg.axis().scale(this.x) .orient("bottom").ticks(this.opt.xticks || 10); var yAxis = d3.svg.axis().scale(this.y) .orient("left").ticks(10); this.svg.append("g") .attr("class", "x axis") .attr("transform", "translate(0," + this.height + ")") .call(xAxis); this.svg.append("g") .attr("class", "y axis") .call(yAxis); this.svg.append("text") .attr("x", -25) .attr("y", -15) .attr("class", "axis-label") .text("AQI range"); this.svg.append("text") .attr("x", this.width - 150) .attr("y", this.height - 10) .attr("class", "axis-label") .text("Concentration in ppm"); var self = this, l = this.labels.length; this.labels.forEach(function(opt, n) { self.svg.append("text") .attr("x", self.width) .attr("y", self.height - 50 - 15 * (l - n)) .attr("fill", opt.color) .style("text-anchor", "end") .attr("class", opt.class || "axis-legend") .text(opt.title); }); }; var ozone1h = [{ c: 125, a: 100 }, { c: 165, a: 150 }, { c: 205, a: 200 }, { c: 405, a: 300 }, ]; var ozone8h = [{ c: 0, a: 0 }, { c: 60, a: 50 }, { c: 75, a: 100 }, { c: 95, a: 150 }, { c: 115, a: 200 }, { c: 375, a: 300 } ]; var ozone8hnew = [{ c: 0, a: 0 }, { c: 50, a: 50 }, { c: 65, a: 100 }, { c: 85, a: 150 }, { c: 105, a: 200 }, { c: 200, a: 300 }, ]; var ozoneic = [{ c: 0, a: 0 }, { c: 60, a: 50 }, { c: 125, a: 100 }, { c: 165, a: 150 }, { c: 205, a: 200 }, { c: 405, a: 300 }, { c: 605, a: 500 } ]; var ozonecn1 = [{ c: 0, a: 0 }, { c: 160, a: 50 }, { c: 200, a: 100 }, { c: 300, a: 150 }, { c: 400, a: 200 }, { c: 800, a: 300 }, { c: 1000, a: 400 }, { c: 1200, a: 500 } ]; var ozonecn8 = [{ c: 0, a: 0 }, { c: 100, a: 50 }, { c: 160, a: 100 }, { c: 215, a: 150 }, { c: 265, a: 200 }, { c: 800, a: 300 } ]; var ozonein18 = [{ c: 0, a: 0 }, { c: 50, a: 50 }, { c: 100, a: 100 }, { c: 168, a: 200 }, { c: 208, a: 300 }, { c: 748, a: 400 }, { c: 940, a: 500 } ]; var w = 300; var g = new AqiGraph('ozonescale', w * 1.5, w); g.plot(ozoneic, { color: "#2c2", title: "Ozone Instant Cast", w: 10, r: 1 }); g.plot(ozone1h, { color: "blue", title: "Ozone 1 hour", w: 3 }); g.plot(ozone8h, { color: "red", title: "Ozone 8 hour", w: 3 }); g.plot(ozone8hnew, { color: "#888", title: "Ozone - 8h new standard proposal from the USEPA", w: 3, class: "axis-legend-small" }); g.finish(); var g = new AqiGraph('ozonescalefull', w, 420, { maxaqi: 500, maxc: 600, xticks: 5 }); g.plot(ozoneic, { color: "red", title: "Ozone Instant Cast", w: 3, r: 3 }); g.plot(ozonecn1, { color: "blue", title: "Ozone 1 hour (CN MEP)", w: 3, conv: 2.1414 }); g.plot(ozonecn8, { color: "#2c2", title: "Ozone 8 hour (CN MEP)", w: 3, conv: 2.1414 }); g.plot(ozonein18, { color: "#c2c", title: "Ozone 8 hour (IN NAQI)", w: 3, conv: 2.1414 }); g.plot(ozone8hnew, { color: "#888", title: "Ozone - 8h new standard proposal from the USEPA", w: 2, class: "axis-legend-small" }); g.finish(); var scales=new AqiScale({"us":{"standard":{"epa":"United States Environmental Protection Agency","url":"http:\/\/epa.gov","unit":["AQI","Air Quality Index"]},"levels":[{"range":50,"title":"Good","color":"#009966","description":"Air quality is considered satisfactory, and air pollution poses little or no 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function doInitPage() { var width = document.getElementById("pm-table").clientWidth * .95 - 300; compareScales("aqi-scales", scales.countries(["us", "cn", "in"], "o3", 8), .4, width, "ppm", "Ozone (8 hours) scales comparison" ); compareScales("aqi-scales", scales.countries(["us", "cn", "in"], "o3", 1), .6, width, "ppm", "Ozone (1 hour) scales comparison" ); } doInitPage(); </script> <br> <br></div></div></div></div><center style='border-top: 1px solid #ccc;padding:20px 0;border-bottom: 1px solid #ccc;'><style>#gaia-section-banner {word-break: break-word;cursor: pointer;font-size: 18px;line-height: 1.6;font-family: "Noto Serif", Cambria, "Palatino Linotype", "Book Antiqua", "URW Palladio L", serif;text-align: center;word-break: break-all;margin: 0;padding: 0px;min-height: 0px;width: auto;max-width: 100%;text-align: center;word-break: break-word;transition: height .5s ease;overflow-y: hidden;}#gaia-section-banner>div>div {width: 33%;/* max-width: 420px; */}#gaia-section-banner a {background-color: rgba(0, 134, 200, .8);color: white;border-radius: 25px;border: none;padding: 8px 20px;margin-left: 18px;line-height: 1.42;}#gaia-section-banner>div {display: flex;align-items: center;justify-content: center;}#gaia-section-banner a div {font-size: 80%;white-space: nowrap;}#gaia-section-banner>div>img {height: 88px;}@media screen and (max-width: 700px) {#gaia-section-banner {text-align: center;height: auto;}#gaia-section-banner>div>img {max-width: 80%;max-height: 150px;height: auto;}#gaia-section-banner a {margin-right:18px;}#gaia-section-banner a div {font-size: 100%;white-space: unset;display: inline-block;}#gaia-section-banner>div {flex-direction: column;}#gaia-section-banner>div>div {width: 100%;}}#gaia-section-banner a:hover {text-decoration: none;}</style><div id='gaia-section-banner'><div><div style='display:block'><span>您知道您所在地區有空氣品質監測站嗎？</span> <span>為什麼不使用您自己的空氣品質站參與地圖呢？</span></div><img src='/air/view/gaia/images/gaia-series-a12-icon-with-map.png'><a 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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>本網站採用的污染指數和顏色與EPA是完全相同的。 EPA的指數可以從<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>維基百科</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關空氣質量與污染，詳見<a href='http://en.wikipedia.org/wiki/Air_quality'>維基百科</a>或者<a href='http://www.airnow.gov/index.cfm?action=aqibasics.aqi' > AirNow</a><br><br>有關健康建議詳見北京的Richard Saint Cyr MD醫生的博客：<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>注意事項</b>: 所有空氣品質數據在發佈時均未經驗證，且為了確保資料準確性，這些數據可能隨時被修改，恕不另行通知。 <a href='https://aqicn.org'>世界空氣品質指數</a>專案在編制這些訊息內容時已經謹慎的運用了所有適當的技巧，在任何情況下<a href =“https://aqicn.org“>世界空氣品質指數</a> 在任何情況下，世界空氣品質指數專案團隊或其代理人均不對因提供此數據而直接或間接引起的任何損失、傷害或損害來承擔契約、侵權或其他責任。</div><br><br><br></center><div id="fixed-footer-marker" class="locked"></div><div 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>Francais - 法國人</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//pl' >Polski - Polish</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//de' >Deutsch - German</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//pt' >Português - Portuguese</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//vn' >Tiếng Việt - Vietnamese</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//it' >Italiano - Italian</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//id' >bahasa Indonesia - Indonesian</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//nl' >Nederlands - 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value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//hi' >हिंदी - Hindi</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//ar' >العربية - Arabic</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//sr' >Српски - Serbian</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//bn' >বাংলা - Bangla</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//bs' >босански - Bosnian</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//hr' >hrvatski - Croatian</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//tr' >Türkçe - Turkish</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//uk' >українська - Ukrainian</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//cs' >čeština - Czech</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//be' >беларускі - Belarusian</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//km' >ខ្មែរ - Khmer</option><option value='https://aqicn.org/faq/2015-05-18/ground-ozone-air-quality-index-update-with-instant-cast//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 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