CINXE.COM

<!DOCTYPE html> <html class="client-nojs vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-disabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-not-available" lang="en" dir="ltr"> <head> <meta charset="UTF-8"> <title>View source for Charles David Keeling - Wikipedia</title> <script>(function(){var className="client-js vector-feature-language-in-header-enabled vector-feature-language-in-main-page-header-disabled vector-feature-page-tools-pinned-disabled vector-feature-toc-pinned-clientpref-1 vector-feature-main-menu-pinned-disabled vector-feature-limited-width-clientpref-1 vector-feature-limited-width-content-disabled vector-feature-custom-font-size-clientpref-1 vector-feature-appearance-pinned-clientpref-1 vector-feature-night-mode-enabled skin-theme-clientpref-day vector-sticky-header-enabled vector-toc-not-available";var cookie=document.cookie.match(/(?:^|; )enwikimwclientpreferences=([^;]+)/);if(cookie){cookie[1].split('%2C').forEach(function(pref){className=className.replace(new RegExp('(^| )'+pref.replace(/-clientpref-\w+$|[^\w-]+/g,'')+'-clientpref-\\w+( |$)'),'$1'+pref+'$2');});}document.documentElement.className=className;}());RLCONF={"wgBreakFrames":true,"wgSeparatorTransformTable":["",""],"wgDigitTransformTable":["",""],"wgDefaultDateFormat":"dmy", "wgMonthNames":["","January","February","March","April","May","June","July","August","September","October","November","December"],"wgRequestId":"e7cf3758-6250-428e-a9c0-833191ed731c","wgCanonicalNamespace":"","wgCanonicalSpecialPageName":false,"wgNamespaceNumber":0,"wgPageName":"Charles_David_Keeling","wgTitle":"Charles David Keeling","wgCurRevisionId":1257610382,"wgRevisionId":0,"wgArticleId":2099511,"wgIsArticle":false,"wgIsRedirect":false,"wgAction":"edit","wgUserName":null,"wgUserGroups":["*"],"wgCategories":[],"wgPageViewLanguage":"en","wgPageContentLanguage":"en","wgPageContentModel":"wikitext","wgRelevantPageName":"Charles_David_Keeling","wgRelevantArticleId":2099511,"wgIsProbablyEditable":true,"wgRelevantPageIsProbablyEditable":true,"wgRestrictionEdit":[],"wgRestrictionMove":[],"wgNoticeProject":"wikipedia","wgCiteReferencePreviewsActive":false,"wgFlaggedRevsParams":{"tags":{"status":{"levels":1}}},"wgMediaViewerOnClick":true,"wgMediaViewerEnabledByDefault":true,"wgPopupsFlags" :0,"wgVisualEditor":{"pageLanguageCode":"en","pageLanguageDir":"ltr","pageVariantFallbacks":"en"},"wgMFDisplayWikibaseDescriptions":{"search":true,"watchlist":true,"tagline":false,"nearby":true},"wgWMESchemaEditAttemptStepOversample":false,"wgWMEPageLength":20000,"wgEditSubmitButtonLabelPublish":true,"wgULSPosition":"interlanguage","wgULSisCompactLinksEnabled":false,"wgVector2022LanguageInHeader":true,"wgULSisLanguageSelectorEmpty":false,"wgCheckUserClientHintsHeadersJsApi":["brands","architecture","bitness","fullVersionList","mobile","model","platform","platformVersion"],"GEHomepageSuggestedEditsEnableTopics":true,"wgGETopicsMatchModeEnabled":false,"wgGEStructuredTaskRejectionReasonTextInputEnabled":false,"wgGELevelingUpEnabledForUser":false};RLSTATE={"ext.globalCssJs.user.styles":"ready","site.styles":"ready","user.styles":"ready","ext.globalCssJs.user":"ready","user":"ready","user.options":"loading","skins.vector.search.codex.styles":"ready","skins.vector.styles":"ready", "skins.vector.icons":"ready","jquery.makeCollapsible.styles":"ready","ext.charinsert.styles":"ready","ext.wikimediamessages.styles":"ready","ext.visualEditor.desktopArticleTarget.noscript":"ready","ext.uls.interlanguage":"ready","ext.wikimediaBadges":"ready"};RLPAGEMODULES=["mediawiki.action.edit.collapsibleFooter","site","mediawiki.page.ready","jquery.makeCollapsible","skins.vector.js","ext.centralNotice.geoIP","ext.charinsert","ext.gadget.ReferenceTooltips","ext.gadget.charinsert","ext.gadget.extra-toolbar-buttons","ext.gadget.refToolbar","ext.gadget.switcher","ext.urlShortener.toolbar","ext.centralauth.centralautologin","mmv.bootstrap","ext.popups","ext.visualEditor.desktopArticleTarget.init","ext.visualEditor.targetLoader","ext.echo.centralauth","ext.eventLogging","ext.wikimediaEvents","ext.navigationTiming","ext.uls.interface","ext.cx.eventlogging.campaigns","ext.checkUser.clientHints","ext.growthExperiments.SuggestedEditSession"];</script> <script>(RLQ=window.RLQ||[]).push(function(){mw.loader.impl(function(){return["user.options@12s5i",function($,jQuery,require,module){mw.user.tokens.set({"patrolToken":"+\\","watchToken":"+\\","csrfToken":"+\\"}); }];});});</script> <link rel="stylesheet" href="/w/load.php?lang=en&modules=ext.charinsert.styles%7Cext.uls.interlanguage%7Cext.visualEditor.desktopArticleTarget.noscript%7Cext.wikimediaBadges%7Cext.wikimediamessages.styles%7Cjquery.makeCollapsible.styles%7Cskins.vector.icons%2Cstyles%7Cskins.vector.search.codex.styles&only=styles&skin=vector-2022"> <script async="" src="/w/load.php?lang=en&modules=startup&only=scripts&raw=1&skin=vector-2022"></script> <meta name="ResourceLoaderDynamicStyles" content=""> <link rel="stylesheet" href="/w/load.php?lang=en&modules=site.styles&only=styles&skin=vector-2022"> <meta name="generator" content="MediaWiki 1.44.0-wmf.16"> <meta name="referrer" content="origin"> <meta name="referrer" content="origin-when-cross-origin"> <meta name="robots" content="noindex,nofollow,max-image-preview:standard"> <meta name="format-detection" content="telephone=no"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/5/56/Charles_David_Keeling_2001.jpg"> <meta property="og:image:width" content="1200"> <meta property="og:image:height" content="1510"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/5/56/Charles_David_Keeling_2001.jpg/800px-Charles_David_Keeling_2001.jpg"> <meta property="og:image:width" content="800"> <meta property="og:image:height" content="1007"> <meta property="og:image" content="https://upload.wikimedia.org/wikipedia/commons/thumb/5/56/Charles_David_Keeling_2001.jpg/640px-Charles_David_Keeling_2001.jpg"> <meta property="og:image:width" content="640"> <meta property="og:image:height" content="805"> <meta name="viewport" content="width=1120"> <meta property="og:title" content="View source for Charles David Keeling - Wikipedia"> <meta property="og:type" content="website"> <link rel="preconnect" href="//upload.wikimedia.org"> <link rel="alternate" media="only screen and (max-width: 640px)" href="//en.m.wikipedia.org/wiki/Charles_David_Keeling"> <link rel="alternate" type="application/x-wiki" title="Edit this page" href="/w/index.php?title=Charles_David_Keeling&action=edit"> <link rel="apple-touch-icon" href="/static/apple-touch/wikipedia.png"> <link rel="icon" href="/static/favicon/wikipedia.ico"> <link rel="search" type="application/opensearchdescription+xml" href="/w/rest.php/v1/search" title="Wikipedia (en)"> <link rel="EditURI" type="application/rsd+xml" href="//en.wikipedia.org/w/api.php?action=rsd"> <link rel="canonical" href="https://en.wikipedia.org/wiki/Charles_David_Keeling"> <link rel="license" href="https://creativecommons.org/licenses/by-sa/4.0/deed.en"> <link rel="alternate" type="application/atom+xml" title="Wikipedia Atom feed" href="/w/index.php?title=Special:RecentChanges&feed=atom"> <link rel="dns-prefetch" href="login.wikimedia.org"> </head> <body class="skin--responsive skin-vector skin-vector-search-vue mediawiki ltr sitedir-ltr mw-hide-empty-elt ns-0 ns-subject mw-editable page-Charles_David_Keeling rootpage-Charles_David_Keeling skin-vector-2022 action-edit"><a class="mw-jump-link" href="#bodyContent">Jump to content</a> <div class="vector-header-container"> <header class="vector-header mw-header"> <div class="vector-header-start"> <nav class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-dropdown" class="vector-dropdown vector-main-menu-dropdown vector-button-flush-left vector-button-flush-right" title="Main menu" > <input type="checkbox" id="vector-main-menu-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-main-menu-dropdown" class="vector-dropdown-checkbox " aria-label="Main menu" > <label id="vector-main-menu-dropdown-label" for="vector-main-menu-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-menu mw-ui-icon-wikimedia-menu"></span> <span class="vector-dropdown-label-text">Main menu</span> </label> <div class="vector-dropdown-content"> <div id="vector-main-menu-unpinned-container" class="vector-unpinned-container"> <div id="vector-main-menu" class="vector-main-menu vector-pinnable-element"> <div class="vector-pinnable-header vector-main-menu-pinnable-header vector-pinnable-header-unpinned" data-feature-name="main-menu-pinned" data-pinnable-element-id="vector-main-menu" data-pinned-container-id="vector-main-menu-pinned-container" data-unpinned-container-id="vector-main-menu-unpinned-container" > <div class="vector-pinnable-header-label">Main menu</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-main-menu.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-main-menu.unpin">hide</button> </div> <div id="p-navigation" class="vector-menu mw-portlet mw-portlet-navigation" > <div class="vector-menu-heading"> Navigation </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-mainpage-description" class="mw-list-item"><a href="/wiki/Main_Page" title="Visit the main page [z]" accesskey="z"><span>Main page</span></a></li><li id="n-contents" class="mw-list-item"><a href="/wiki/Wikipedia:Contents" title="Guides to browsing Wikipedia"><span>Contents</span></a></li><li id="n-currentevents" class="mw-list-item"><a href="/wiki/Portal:Current_events" title="Articles related to current events"><span>Current events</span></a></li><li id="n-randompage" class="mw-list-item"><a href="/wiki/Special:Random" title="Visit a randomly selected article [x]" accesskey="x"><span>Random article</span></a></li><li id="n-aboutsite" class="mw-list-item"><a href="/wiki/Wikipedia:About" title="Learn about Wikipedia and how it works"><span>About Wikipedia</span></a></li><li id="n-contactpage" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us" title="How to contact Wikipedia"><span>Contact us</span></a></li> </ul> </div> </div> <div id="p-interaction" class="vector-menu mw-portlet mw-portlet-interaction" > <div class="vector-menu-heading"> Contribute </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="n-help" class="mw-list-item"><a href="/wiki/Help:Contents" title="Guidance on how to use and edit Wikipedia"><span>Help</span></a></li><li id="n-introduction" class="mw-list-item"><a href="/wiki/Help:Introduction" title="Learn how to edit Wikipedia"><span>Learn to edit</span></a></li><li id="n-portal" class="mw-list-item"><a href="/wiki/Wikipedia:Community_portal" title="The hub for editors"><span>Community portal</span></a></li><li id="n-recentchanges" class="mw-list-item"><a href="/wiki/Special:RecentChanges" title="A list of recent changes to Wikipedia [r]" accesskey="r"><span>Recent changes</span></a></li><li id="n-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_upload_wizard" title="Add images or other media for use on Wikipedia"><span>Upload file</span></a></li><li id="n-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages"><span>Special pages</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> <a href="/wiki/Main_Page" class="mw-logo"> <img class="mw-logo-icon" src="/static/images/icons/wikipedia.png" alt="" aria-hidden="true" height="50" width="50"> <span class="mw-logo-container skin-invert"> <img class="mw-logo-wordmark" alt="Wikipedia" src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" style="width: 7.5em; height: 1.125em;"> <img class="mw-logo-tagline" alt="The Free Encyclopedia" src="/static/images/mobile/copyright/wikipedia-tagline-en.svg" width="117" height="13" style="width: 7.3125em; height: 0.8125em;"> </span> </a> </div> <div class="vector-header-end"> <div id="p-search" role="search" class="vector-search-box-vue vector-search-box-collapses vector-search-box-show-thumbnail vector-search-box-auto-expand-width vector-search-box"> <a href="/wiki/Special:Search" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only search-toggle" title="Search Wikipedia [f]" accesskey="f"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia" aria-label="Search Wikipedia" autocapitalize="sentences" title="Search Wikipedia [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Personal tools"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Change the appearance of the page's font size, width, and color" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Appearance" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Appearance</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=en.wikipedia.org&uselang=en" class=""><span>Donate</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:CreateAccount&returnto=Charles+David+Keeling&returntoquery=action%3Dedit" title="You are encouraged to create an account and log in; however, it is not mandatory" class=""><span>Create account</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Special:UserLogin&returnto=Charles+David+Keeling&returntoquery=action%3Dedit" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o" class=""><span>Log in</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Log in and more options" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Personal tools" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Personal tools</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="User menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=en.wikipedia.org&uselang=en"><span>Donate</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=Charles+David+Keeling&returntoquery=action%3Dedit" title="You are encouraged to create an account and log in; however, it is not mandatory"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Create account</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Special:UserLogin&returnto=Charles+David+Keeling&returntoquery=action%3Dedit" title="You're encouraged to log in; however, it's not mandatory. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Log in</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Pages for logged out editors <a href="/wiki/Help:Introduction" aria-label="Learn more about editing"><span>learn more</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Special:MyContributions" title="A list of edits made from this IP address [y]" accesskey="y"><span>Contributions</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Special:MyTalk" title="Discussion about edits from this IP address [n]" accesskey="n"><span>Talk</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Site"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <h1 id="firstHeading" class="firstHeading mw-first-heading">View source for Charles David Keeling</h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="This article exist only in this language. Add the article for other languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-0" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">Add languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> <div class="after-portlet after-portlet-lang"><span class="uls-after-portlet-link"></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Namespaces"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Charles_David_Keeling" title="View the content page [c]" accesskey="c"><span>Article</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Talk:Charles_David_Keeling" rel="discussion" title="Discuss improvements to the content page [t]" accesskey="t"><span>Talk</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Change language variant" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">English</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Views"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="vector-tab-noicon mw-list-item"><a href="/wiki/Charles_David_Keeling"><span>Read</span></a></li><li id="ca-edit" class="selected vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Charles_David_Keeling&action=edit" title="Edit this page"><span>Edit</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Charles_David_Keeling&action=history" title="Past revisions of this page [h]" accesskey="h"><span>View history</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Tools" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Tools</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Tools</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">hide</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="vector-more-collapsible-item mw-list-item"><a href="/wiki/Charles_David_Keeling"><span>Read</span></a></li><li id="ca-more-edit" class="selected vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Charles_David_Keeling&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Charles_David_Keeling&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/Charles_David_Keeling" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/Charles_David_Keeling" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="//en.wikipedia.org/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Charles_David_Keeling&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fw%2Findex.php%3Ftitle%3DCharles_David_Keeling%26action%3Dedit"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fw%2Findex.php%3Ftitle%3DCharles_David_Keeling%26action%3Dedit"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q572001" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> </div> <div id="contentSub"><div id="mw-content-subtitle">← <a href="/wiki/Charles_David_Keeling" title="Charles David Keeling">Charles David Keeling</a></div></div> <div id="mw-content-text" class="mw-body-content"><p>You do not have permission to edit this page, for the following reasons: </p> <ul class="permissions-errors"><li class="mw-permissionerror-blockedtext"> <div id="mw-blocked-text" style="border: 1px solid #AAA; background-color: var(--background-color-warning-subtle, ivory); color: inherit; padding: 1.5em; width: 100%; box-sizing: border-box;"> <div style="text-align: center;"><span style="font-size: 26px;"><span typeof="mw:File"><a href="/wiki/File:Stop_hand_nuvola.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/f/f1/Stop_hand_nuvola.svg/50px-Stop_hand_nuvola.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/f1/Stop_hand_nuvola.svg/75px-Stop_hand_nuvola.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/f1/Stop_hand_nuvola.svg/100px-Stop_hand_nuvola.svg.png 2x" data-file-width="240" data-file-height="240" /></a></span><b> This IP address has been <a href="/wiki/Wikipedia:Blocking_policy" title="Wikipedia:Blocking policy">blocked</a> from <i>editing</i> Wikipedia.</b></span><br /><span style="font-size: 18px;">This does not affect your ability to <i>read</i> Wikipedia pages.</span></div><div class="paragraphbreak" style="margin-top:0.5em"></div><b>Most people who see this message have done nothing wrong.</b> Some kinds of blocks restrict editing from specific service providers or telecom companies in response to recent abuse or vandalism, and can sometimes affect other users who are unrelated to that abuse. Review the information below for assistance if you do not believe that you have done anything wrong.<div class="paragraphbreak" style="margin-top:0.5em"></div> <p>The IP address or range 8.222.128.0/17 has been <a href="/wiki/Wikipedia:Blocking_policy" title="Wikipedia:Blocking policy">blocked</a> by <a href="/wiki/User:L235" title="User:L235">‪L235‬</a> for the following reason(s): </p> <div style="padding:10px; background:var(--background-color-base, white); color:inherit; border:1px #666 solid;"> <div class="user-block colocation-webhost" style="margin-bottom: 0.5em; background-color: #ffefd5; border: 1px solid #AAA; padding: 0.7em;"> <figure class="mw-halign-left" typeof="mw:File"><span><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/53/Server-multiple.svg/40px-Server-multiple.svg.png" decoding="async" width="40" height="57" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/53/Server-multiple.svg/60px-Server-multiple.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/53/Server-multiple.svg/80px-Server-multiple.svg.png 2x" data-file-width="744" data-file-height="1052" /></span><figcaption></figcaption></figure><b>The <a href="/wiki/IP_address" title="IP address">IP address</a> that you are currently using has been blocked because it is believed to be a <a href="/wiki/Web_hosting_service" title="Web hosting service">web host provider</a> or <a href="/wiki/Colocation_centre" title="Colocation centre">colocation provider</a>.</b> To prevent abuse, <a href="/wiki/Wikipedia:Open_proxies" title="Wikipedia:Open proxies">web hosts and colocation providers may be blocked</a> from editing Wikipedia. <div style="border-top: 1px solid #AAA; clear: both">You will not be able to edit Wikipedia using a web host or colocation provider because it hides your IP address, much like a <a href="/wiki/Wikipedia:Open_proxies" title="Wikipedia:Open proxies">proxy</a> or <a href="/wiki/Virtual_private_network" title="Virtual private network">VPN</a>. <p><b>We recommend that you attempt to use another connection to edit.</b> For example, if you use a proxy or VPN to connect to the internet, turn it off when editing Wikipedia. If you edit using a mobile connection, try using a Wi-Fi connection, and vice versa. If you are using a corporate internet connection, switch to a different Wi-Fi network. If you have a Wikipedia account, please log in. </p><p>If you do not have any other way to edit Wikipedia, you will need to <a href="/wiki/Wikipedia:IP_block_exemption#Requesting_and_granting_exemption" title="Wikipedia:IP block exemption">request an IP block exemption</a>. </p> <style data-mw-deduplicate="TemplateStyles:r1214851843">.mw-parser-output .hidden-begin{box-sizing:border-box;width:100%;padding:5px;border:none;font-size:95%}.mw-parser-output .hidden-title{font-weight:bold;line-height:1.6;text-align:left}.mw-parser-output .hidden-content{text-align:left}@media all and (max-width:500px){.mw-parser-output .hidden-begin{width:auto!important;clear:none!important;float:none!important}}</style><div class="hidden-begin mw-collapsible mw-collapsed" style=""><div class="hidden-title skin-nightmode-reset-color" style="text-align:center;">How to appeal if you are confident that your connection does not use a colocation provider's IP address:</div><div class="hidden-content mw-collapsible-content" style=""> If you are confident that you are not using a web host, you may <a href="/wiki/Wikipedia:Appealing_a_block" title="Wikipedia:Appealing a block">appeal this block</a> by adding the following text on your <a href="/wiki/Help:Talk_pages" title="Help:Talk pages">talk page</a>: <code>{{<a href="/wiki/Template:Unblock" title="Template:Unblock">unblock</a>|reason=Caught by a colocation web host block but this host or IP is not a web host. My IP address is _______. <i>Place any further information here.</i> ~~~~}}</code>. <b>You must fill in the blank with your IP address for this block to be investigated.</b> Your IP address can be determined <span class="plainlinks"><b><a class="external text" href="https://en.wikipedia.org/wiki/Wikipedia:Get_my_IP_address?withJS=MediaWiki:Get-my-ip.js">here</a></b></span>. Alternatively, if you wish to keep your IP address private you can use the <a href="/wiki/Wikipedia:Unblock_Ticket_Request_System" title="Wikipedia:Unblock Ticket Request System">unblock ticket request system</a>. There are several reasons you might be editing using the IP address of a web host or colocation provider (such as if you are using VPN software or a business network); please use this method of appeal only if you think your IP address is in fact not a web host or colocation provider.</div></div> <p><span class="sysop-show" style="font-size: 85%;"><span style="border:#707070 solid 1px;background-color:#ffe0e0;padding:2px"><b>Administrators:</b></span> The <a href="/wiki/Wikipedia:IP_block_exemption" title="Wikipedia:IP block exemption">IP block exemption</a> user right should only be applied to allow users to edit using web host in exceptional circumstances, and requests should usually be directed to the functionaries team via email. If you intend to give the IPBE user right, a <a href="/wiki/Wikipedia:CheckUser" title="Wikipedia:CheckUser">CheckUser</a> needs to take a look at the account. This can be requested most easily at <a href="/wiki/Wikipedia:SPI#Quick_CheckUser_requests" class="mw-redirect" title="Wikipedia:SPI">SPI Quick Checkuser Requests</a>. <b>Unblocking</b> an IP or IP range with this template <b>is highly discouraged</b> without at least contacting the blocking administrator.</span> </p> </div></div> </div> <p>This block will expire on 18:23, 24 August 2026. Your current IP address is 8.222.208.146. </p> <div class="paragraphbreak" style="margin-top:0.5em"></div><div style="font-size: 16px;"> <p>Even when blocked, you will <i>usually</i> still be able to edit your <a href="/wiki/Special:MyTalk" title="Special:MyTalk">user talk page</a>, as well as <a href="/wiki/Wikipedia:Emailing_users" title="Wikipedia:Emailing users">email</a> administrators and other editors. </p> </div> <div class="paragraphbreak" style="margin-top:0.5em"></div><div style="font-size: 16px;"> <p>For information on how to proceed, please read the <b><a href="/wiki/Wikipedia:Appealing_a_block#Common_questions" title="Wikipedia:Appealing a block">FAQ for blocked users</a></b> and the <a href="/wiki/Wikipedia:Appealing_a_block" title="Wikipedia:Appealing a block">guideline on block appeals</a>. The <a href="/wiki/Wikipedia:Guide_to_appealing_blocks" title="Wikipedia:Guide to appealing blocks">guide to appealing blocks</a> may also be helpful. </p> </div> <p>Other useful links: <a href="/wiki/Wikipedia:Blocking_policy" title="Wikipedia:Blocking policy">Blocking policy</a> · <a href="/wiki/Help:I_have_been_blocked" title="Help:I have been blocked">Help:I have been blocked</a> </p> </div></li><li class="mw-permissionerror-globalblocking-blockedtext-range"> <div id="mw-blocked-text" style="border: 1px solid #AAA; background-color: var(--background-color-warning-subtle, ivory); color: inherit; padding: 1.5em; width: 100%; box-sizing: border-box;"> <div style="text-align: center;"><span style="font-size: 26px;"><span typeof="mw:File"><a href="/wiki/File:Stop_hand_nuvola.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/f/f1/Stop_hand_nuvola.svg/50px-Stop_hand_nuvola.svg.png" decoding="async" width="50" height="50" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/f/f1/Stop_hand_nuvola.svg/75px-Stop_hand_nuvola.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/f/f1/Stop_hand_nuvola.svg/100px-Stop_hand_nuvola.svg.png 2x" data-file-width="240" data-file-height="240" /></a></span><b> This IP address range has been <a href="https://meta.wikimedia.org/wiki/Global_blocks" class="extiw" title="m:Global blocks">globally blocked</a>.</b></span><br /><span style="font-size: 18px;">This does not affect your ability to <i>read</i> Wikipedia pages.</span></div><div class="paragraphbreak" style="margin-top:0.5em"></div><b>Most people who see this message have done nothing wrong.</b> Some kinds of blocks restrict editing from specific service providers or telecom companies in response to recent abuse or vandalism, and can sometimes affect other users who are unrelated to that abuse. Review the information below for assistance if you do not believe that you have done anything wrong.<div class="paragraphbreak" style="margin-top:0.5em"></div><div class="paragraphbreak" style="margin-top:0.5em"></div> <p>This block affects editing on all Wikimedia wikis. </p><p>The IP address or range 8.222.128.0/17 has been globally <a href="/wiki/Wikipedia:Blocking_policy" title="Wikipedia:Blocking policy">blocked</a> by <a href="/wiki/User:Jon_Kolbert" title="User:Jon Kolbert">‪Jon Kolbert‬</a> for the following reason(s): </p> <div style="padding:10px; background:var(--background-color-base, white); color:inherit; border:1px #666 solid;"> <p><a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/NOP" class="extiw" title="m:Special:MyLanguage/NOP">Open proxy/Webhost</a>: See the <a href="https://meta.wikimedia.org/wiki/WM:OP/H" class="extiw" title="m:WM:OP/H">help page</a> if you are affected </p> </div> <p>This block will expire on 15:12, 27 August 2028. Your current IP address is 8.222.208.146. </p> <div class="paragraphbreak" style="margin-top:0.5em"></div><div style="font-size: 16px;"> <p>Even while globally blocked, you will <i>usually</i> still be able to edit pages on <a href="https://meta.wikimedia.org/wiki/" class="extiw" title="m:">Meta-Wiki</a>. </p> </div> <div class="paragraphbreak" style="margin-top:0.5em"></div><div style="font-size: 16px;"> <p>If you believe you were blocked by mistake, you can find additional information and instructions in the <a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/No_open_proxies" class="extiw" title="m:Special:MyLanguage/No open proxies">No open proxies</a> global policy. Otherwise, to discuss the block please <a href="https://meta.wikimedia.org/wiki/Steward_requests/Global" class="extiw" title="m:Steward requests/Global">post a request for review on Meta-Wiki</a>. You could also send an email to the <a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/Stewards" class="extiw" title="m:Special:MyLanguage/Stewards">stewards</a> <a href="https://meta.wikimedia.org/wiki/Special:MyLanguage/VRT" class="extiw" title="m:Special:MyLanguage/VRT">VRT</a> queue at <kbd>stewards@wikimedia.org</kbd> including all above details. </p> </div> <p>Other useful links: <a href="https://meta.wikimedia.org/wiki/Global_blocks" class="extiw" title="m:Global blocks">Global blocks</a> · <a href="/wiki/Help:I_have_been_blocked" title="Help:I have been blocked">Help:I have been blocked</a> </p> </div></li></ul><hr /> <div id="viewsourcetext">You can view and copy the source of this page:</div><textarea readonly="" accesskey="," id="wpTextbox1" cols="80" rows="25" style="" class="mw-editfont-monospace" lang="en" dir="ltr" name="wpTextbox1">{{short description|American scientist (1928-2005)}} {{use mdy dates |date=October 2020}} {{Infobox scientist | name = Charles David Keeling | image = Charles David Keeling 2001.jpg | alt = | caption = Keeling receives the Medal of Science in 2001 | birth_date = {{Birth date|1928|04|20}} | birth_place = [[Scranton, Pennsylvania]], U.S. | death_date = {{Death date and age|2005|06|20|1928|04|20}} | death_place = [[Hamilton, Montana]], U.S. | residence = | fields = Atmosphere | workplaces = [[Scripps Institution of Oceanography]] | alma_mater = [[University of Illinois at Urbana-Champaign|University of Illinois]]<br>[[Northwestern University]] | doctoral_advisor = [[Malcolm Dole]] | academic_advisors = | doctoral_students = | notable_students = | known_for = [[Keeling Curve]] | author_abbrev_bot = | author_abbrev_zoo = | influences = | influenced = | awards = Second Half Century Award, [[American Meteorological Society]] (1981)<br /> [[Maurice Ewing Medal]] (1991)<br /> [[Blue Planet Prize]] (1993)<br /> [[National Medal of Science]] (2002)<br /> [[Tyler Prize for Environmental Achievement]] (2005) | signature =  | signature_alt = | footnotes = }} '''Charles David Keeling''' (April 20, 1928 – June 20, 2005)<ref> {{cite journal |pmid=20536268 |year=2010 |last1=Harris |first1=DC |title=Charles David Keeling and the story of atmospheric CO2 measurements |volume=82 |issue=19 |pages=7865–70 |doi=10.1021/ac1001492 |journal=Analytical Chemistry}}</ref><ref> {{cite journal|pmid=16163339|year=2005|last1=Heimann|first1=M|title=Obituary: Charles David Keeling 1928–2005|volume=437|issue=7057|pages=331|doi=10.1038/437331a|journal=Nature|bibcode=2005Natur.437..331H|doi-access=free}}</ref> was an American scientist whose recording of [[carbon dioxide]] at the [[Mauna Loa Observatory]]<ref name="KaheleHanaHou">{{cite web |url= http://www.hanahou.com/pages/Magazine.asp?Action=DrawArticle&ArticleID=616&MagazineID=39 |title= Behind the Inconvenient Truth |author= Rose Kahele |work= [[Hana Hou!]] vol. 10, No. 5, October/November 2007 }}</ref> confirmed [[Svante Arrhenius]]'s proposition (1896) of the possibility of [[Human impact on the environment|anthropogenic]] contribution to the [[greenhouse effect]] and [[global warming]], by documenting the steadily rising carbon dioxide levels. The [[Keeling Curve]] measures the progressive buildup of carbon dioxide, a greenhouse gas, in the atmosphere. ==Early life and early career== Keeling was born in [[Scranton, Pennsylvania]], to Ralph Keeling and Grace L Keeling (née Sherberne). His father, an investment banker, excited interests of [[astronomy]] in a 5-year-old Charles, while his mother instilled a lifelong love of music. He graduated with a degree in [[chemistry]] from the [[University of Illinois at Urbana-Champaign|University of Illinois]] in 1948. Charles Keeling earned a PhD in [[chemistry]] from [[Northwestern University]] in 1953 under [[Malcolm Dole]], a polymer chemist. Most of Dole's graduates were going straight into the oil industry; Keeling "had trouble seeing the future this way" and had become interested in [[geology]], for which he had acquired most of the undergraduate coursework during his PhD. Keeling had applied for postdoctoral positions as a chemist almost exclusively to geology departments "west of the continental divide." He received an offer from [[Harrison Brown]] who had recently started a [[geochemistry]] department at [[California Institute of Technology]]. He was a postdoctoral fellow in [[geochemistry]] there until he joined the [[Scripps Institution of Oceanography]] in 1956, and was appointed professor of [[oceanography]] there in 1968.<ref>{{Cite journal | doi=10.1146/annurev.energy.23.1.25| doi-access=free|title = Rewards and Penalties of Monitoring the Earth| journal=[[Annual Review of Energy and the Environment]]| volume=23| pages=25–82|year = 1998|last1 = Keeling|first1 = Charles D.| citeseerx=10.1.1.173.2051}}</ref> At [[California Institute of Technology|Caltech]] he developed the first instrument able to measure carbon dioxide in atmospheric samples with consistently reliable accuracy.<ref name = "NYT01">{{cite news |title=A Scientist, His Work and a Climate Reckoning|author=Justin Gillis|url=https://www.nytimes.com/2010/12/22/science/earth/22carbon.html|newspaper=The New York Times|date=December 21, 2010|access-date=December 22, 2010}}</ref> Keeling camped at [[Big Sur]] where he used his new device to measure the level of carbon dioxide and found that it had risen since the 19th century. ==Work with the Scripps Institution of Oceanography, 1958–2005== [[Image:Mauna Loa CO2 monthly mean concentration.svg|thumbnail|right|280px|Atmospheric CO<sub>2</sub> concentrations measured at [[Mauna Loa Observatory]]: The ''[[Keeling Curve]]''.]] Keeling worked at the Scripps Institution for 43 years during which time he published many influential papers.<ref>{{Cite journal|last=Keeling|first=Charles D.|date=1960|title=The Concentration and Isotopic Abundances of Carbon Dioxide in the Atmosphere|journal=Tellus|language=en|volume=12|issue=2|pages=200–203|doi=10.1111/j.2153-3490.1960.tb01300.x|bibcode=1960Tell...12..200K|issn=2153-3490}}</ref><ref>{{cite journal|pmid=12791990|year=2003|last1=Nemani|first1=RR|last2=Keeling|first2=CD|last3=Myneni|first7=RB|last8=Running|first8=SW|title=Climate-driven increases in global terrestrial net primary production from 1982 to 1999|volume=300|issue=5625|pages=1560–3|doi=10.1126/science.1082750|journal=Science|bibcode=2003Sci...300.1560N|citeseerx=10.1.1.630.1407|s2cid=9420050}}</ref><ref>{{cite journal|pmid=12719545|year=2003|last1=Clark|first1=DA|last2=Piper|first2=SC|last3=Keeling|first3=CD|last4=Clark|first4=DB|title=Tropical rain forest tree growth and atmospheric carbon dynamics linked to interannual temperature variation during 1984–2000|volume=100|issue=10|pages=5852–7|doi=10.1073/pnas.0935903100|pmc=156290|journal=Proceedings of the National Academy of Sciences of the United States of America|doi-access=free}}</ref><ref>{{cite journal|pmid=12493911|year=2002|last1=Gruber|first1=N|last2=Keeling|first2=CD|last3=Bates|first3=NR|title=Interannual variability in the North Atlantic Ocean carbon sink|volume=298|issue=5602|pages=2374–8|doi=10.1126/science.1077077|journal=Science|bibcode=2002Sci...298.2374G|s2cid=6469504}}</ref><ref>{{cite journal|pmid=10725399|year=2000|last1=Keeling|first1=CD|last2=Whorf|first2=TP|title=The 1,800-year oceanic tidal cycle: A possible cause of rapid climate change|volume=97|issue=8|pages=3814–9|doi=10.1073/pnas.070047197|pmc=18099|journal=Proceedings of the National Academy of Sciences of the United States of America|bibcode=2000PNAS...97.3814K|doi-access=free}}</ref><ref>{{cite journal|pmid=11607740|year=1997|last1=Keeling|first1=CD|last2=Whorf|first2=TP|title=Possible forcing of global temperature by the oceanic tides|volume=94|issue=16|pages=8321–8|pmc=33744|journal=Proceedings of the National Academy of Sciences of the United States of America|doi=10.1073/pnas.94.16.8321|bibcode=1997PNAS...94.8321K|doi-access=free}}</ref><ref>{{cite journal|pmid=11607732|year=1997|last1=Keeling|first1=CD|title=Climate change and carbon dioxide: An introduction|volume=94|issue=16|pages=8273–4|pmc=33714|journal=Proceedings of the National Academy of Sciences of the United States of America|doi=10.1073/pnas.94.16.8273|bibcode=1997PNAS...94.8273K|doi-access=free}}</ref><ref>{{cite journal|pmid=17751153|year=1980|last1=Bacastow|first1=RB|last2=Adams|first2=JA|last3=Keeling|first3=CD|last4=Moss|first4=DJ|last5=Whorf|first5=TP|last6=Wong|first6=CS|title=Atmospheric carbon dioxide, the southern oscillation, and the weak 1975 el nino|volume=210|issue=4465|pages=66–8|doi=10.1126/science.210.4465.66|journal=Science|bibcode=1980Sci...210...66B|s2cid=42802861}}</ref><ref>{{cite journal|pmid=17777967|year=1978|last1=Keeling|first1=CD|title=Atmospheric carbon dioxide in the 19th century|volume=202|issue=4372|pages=1109|doi=10.1126/science.202.4372.1109|journal=Science|bibcode=1978Sci...202.1109K|doi-access=}}</ref> [[Roger Revelle]], the director of the [[Scripps Institution of Oceanography]], based at [[La Jolla, California]], persuaded Keeling to continue his work there. Revelle was also one of the founders of the [[International Geophysical Year]] (IGY) in 1957–58 and Keeling received IGY funding to establish a base on [[Mauna Loa]] in Hawaii, two miles (3,000 m) above sea level. Keeling started collecting carbon dioxide samples at the base in 1958.<ref name="KaheleHanaHou"/> By 1960, he had established that there are strong seasonal variations in carbon dioxide levels with peak levels reached in the late northern hemisphere winter. A reduction in carbon dioxide followed during spring and early summer each year as plant growth increased in the land-rich northern hemisphere. In 1961, Keeling produced data showing that carbon dioxide levels were rising steadily in what later became known as the "[[Keeling Curve]]". In the early 1960s, the [[National Science Foundation]] stopped supporting his research, calling the outcome "routine". Despite this lack of interest, the Foundation used Keeling's research in its warning in 1963 of rapidly increasing amounts of heat-trapping gases. A 1965 report from [[Lyndon B. Johnson|President Johnson's]] [[President's Science Advisory Committee|Science Advisory Committee]] similarly warned of the dangers of extra heat-trapping gases, which cause the temperature of the Earth to rise. The data collection started by Keeling and continued at Mauna Loa is the longest continuous record of atmospheric carbon dioxide in the world and is considered a reliable indicator of the global trend in the mid-level [[troposphere]]. Keeling's research showed that the atmospheric concentration of carbon dioxide grew from 315 parts per million (ppm) in 1958 to 380 (ppm) in 2005, with increases correlated to [[fossil fuel]] emissions. There has also been an increase in seasonal variation in samples from the late 20th century and early 21st century. ==Personal life== Keeling was an enthusiastic outdoorsman who made many hiking and camping trips to the Western mountains, particularly the [[Cascade Mountains]] of [[Washington state]]. He was an active member of the [[The Wilderness Society (United States)|Wilderness Society]] for much of his life.<ref name=WS>Paul M. Keeling, "The Path to Mauna Loa", ''Wilderness'' (2008): 12-14</ref> Keeling married Louise Barthold in 1954. They had five children, one of whom ([[Ralph Keeling]]) followed in his father's footsteps and is a climate scientist at the [[Scripps Institution of Oceanography]]. Another one of his children, Eric Keeling, currently teaches biology at SUNY New Paltz.<ref>{{cite web | url=https://www3.newpaltz.edu/directory/profile/erickeeling?origin=search%3Fentity_id%3D%26first_name%3D%26last_name%3DKeeling%26phone%3D | title=SUNY New Paltz &#124; Eric Keeling |work=www3.newpaltz.edu |access-date=17 December 2022 }}</ref> Charles Keeling was also an accomplished classical pianist who almost chose a career in music. Keeling was a founding director of the [[University of California San Diego]] Madrigal Singers. He was also general chairman of the citizens committee which drafted the [[Del Mar, California|Del Mar]] General Plan (or "Community Plan") in 1975.<ref>{{cite news |author=Peter Kaye |title=Plaque honors Del Mar planners |url=http://www.utsandiego.com/news/2007/jun/24/plaque-honors-del-mar-planners/ |access-date=May 25, 2015 |work=San Diego Union-Tribune |date=June 24, 2007}}</ref> Keeling died in 2005, aged 77, of a [[heart attack]]. ==Legacy== * At a [[White House]] ceremony held in July 1997, Keeling was presented with a "special achievement award" from [[Vice President of the United States|Vice President]] [[Al Gore]]. Keeling was honored "for 40 years of outstanding scientific research associated with monitoring of atmospheric carbon dioxide in connection with [[Mauna Loa Observatory]]". * The Keeling Curve is "engraved in bronze on a building at Mauna Loa and carved into a wall at the [[United States National Academy of Sciences|National Academy of Sciences]] in Washington." It was also a chart on the wall in a classroom at [[Harvard University]] where Revelle had moved to teach in the 1960s and where among others, student [[Al Gore]] would see and "marvel" at it. In 2006, Gore featured the graph in the [[An Inconvenient Truth (book)|book]] and movie ''[[An Inconvenient Truth]]''.<ref name = "NYT01" /> * [https://scripps.ucsd.edu/people/awards/keeling/ Charles David Keeling Memorial Lecture Series], Scripps Institution of Oceanography, since 2010. * [https://sustainability.illinois.edu/outreach/lectures-seminars-symposia-colloquia/ Keeling Lecture], University of Illinois, since 2010. * The Charles David Keeling apartments at [[Revelle College]] of the [[University of California San Diego]], opened in 2011, were designed to emphasize environmental awareness and minimize ecological impact. * ''Dr Keeling's Curve'' (2014), one-man play written by George Shea and performed by [[Mike Farrell]].<ref>{{cite news |url=https://www.presstelegram.com/2014/11/04/mash-star-takes-on-global-warming-in-one-man-show-in-long-beach/ |title='M*A*S*H' star takes on global warming in one-man show in Long Beach |work=[[Press-Telegram]] |date=November 4, 2014 |access-date=December 26, 2014}}</ref> * [https://www.kcurveprize.org''The Keeling Curve Prize'']. Multiple awards presented annually by the [https://terravivagrants.org/keeling-curve-prize-global-warming-mitigation-project/ Global Warming Mitigation Project] since 2018.<ref>{{cite web |author1= |title=Keeling Curve Prize |url=https://www.kcurveprize.org/general-information/ |website=www.kcurveprize.org |access-date=October 5, 2019 |date= |quote=The Keeling Curve Prize rewards a diverse selection of projects reducing greenhouse gas emissions or increasing carbon uptake.}}</ref> ==Memberships/fellowships== Keeling was a Guggenheim fellow at the Meteorological Institute, [[University of Stockholm]] (1961–62); a guest professor at the Second Physical Institute of the [[University of Heidelberg]] (1969–70) and the Physical Institute of the [[University of Bern]] (1979–80). He was a fellow of the [[American Academy of Arts and Sciences]], the American Geophysical Union, and the [[American Association for the Advancement of Science]], and a member of the [[United States National Academy of Sciences|National Academy of Sciences]]. He was a member of the commission on global pollution of the International Association of Meteorology, and scientific director of the Central CO<sub>2</sub> Calibration Laboratory of the World Meteorological Organization. ==Selected publications== * {{Cite journal|last=Keeling|first=Charles D.|date=1958|title=The Concentration and Isotopic Abundances of Carbon Dioxide in Rural Areas|journal=Geochimica et Cosmochimica Acta |language=en|volume=13|pages=322–334|doi=10.1016/0016-7037(61)90023-0}} * {{cite journal|year=1965|last1=Pales|first1=Jack C.|last2=Keeling|first2=Charles David|title=The Concentration of Atmospheric Carbon Dioxide in Hawaii|volume=70|issue=24|pages=6053–6076|doi=10.1029/JZ070i024p06053|journal=Journal of Geophysical Research|bibcode=1965JGR....70.6053P}} * {{Cite journal|last=Keeling|first=Charles D.|date=1970|title=Is Carbon Dioxide from Fossil Fuel Changing Man's Environment?|journal=Proceedings of the American Philosophical Society |language=en|volume=114|issue=1|pages=10–17|jstor=985720}} ==See also== * [[Carbon dioxide in Earth’s atmosphere]] * [[List of climate scientists]] ==References== {{Reflist|35em}} ==Further reading== * Weiner, Jonathan. ''The Next One Hundred Years: Shaping the Fate of Our Living Earth''. New York: Bantam, 1990. * Matthews, Samuel W. “Under the Sun: Is Our World Warming?,” ''National Geographic'' 178(4) (October 1990), pp. 66–99. * Weart, Spencer R. ''The Discovery of Global Warming''. Cambridge, MA: Harvard University Press, 2003. * Kolbert, Elizabeth. “The Climate of Man,” ''The New Yorker'' [three part series], April/May 2005. * Bowen, Mark. ''Thin Ice: Unlocking the Secrets of Climate Change in the World’s Highest Mountains''. New York: Henry Holt, 2005. * Harris, Daniel C. “Charles David Keeling and the Story of Atmospheric CO2 Measurements?,” ''Analytical Chemistry '' 82(19) (2010), pp. 7865–70. == External links == {{Commons category}} * [https://web.archive.org/web/20070704134514/http://scrippsco2.ucsd.edu/home/index.php Scripps Institution of Oceanography's CO<sub>2</sub> Program: Home of the Keeling Curve] * [https://scripps.ucsd.edu/news/5104/ Scripps Institution of Oceanography: Obituary Notice] {{Webarchive|url=https://web.archive.org/web/20200820125400/https://scripps.ucsd.edu/news/5104/ |date=August 20, 2020 }} * [https://www.npr.org/templates/story/story.php?storyId=9885767 NPR Climate Connections: Climate change is clear atop Mauna Loa] * [https://web.archive.org/web/20110927211913/http://cdiac.ornl.gov/new/keel_page.html Carbon Dioxide Information Analysis Center] * [https://www.theguardian.com/climatechange/story/0,12374,1512557,00.html Guardian obituary] *{{cite web|url=https://history.aip.org/climate/Kfunds.htm#L_0257 |title=History of funding of Keeling's work |website=aip.org |publisher=[[American Institute of Physics]] |access-date=October 5, 2019}} *[https://web.archive.org/web/20071216212707/http://sio.ucsd.edu/Special/Keeling_50th_Anniversary/ The Keeling Curve Turns 50 – Scripps Institution of Oceanography] *[http://news.bbc.co.uk/2/hi/science/nature/7120770.stm BBC, 50 years on: The Keeling Curve legacy] *[http://esrl.noaa.gov/gmd/co2conference/ 50th Anniversary of Global CO<sub>2</sub> Record, Symposium and Celebration, Kona HI] *"[https://www.aip.org/initialconditions/episode-2-enter-anthropocene-climate-science-early-20th-century Enter the Anthropocene: Climate Science in the Early 20th Century]," Initial Conditions podcast, episode 2 {{Authority control}} {{DEFAULTSORT:Keeling, Charles David}} [[Category:1928 births]] [[Category:2005 deaths]] [[Category:American oceanographers]] [[Category:People from Scranton, Pennsylvania]] [[Category:Scripps Institution of Oceanography faculty]] [[Category:National Medal of Science laureates]] [[Category:Members of the United States National Academy of Sciences]] [[Category:Fellows of the American Geophysical Union]] [[Category:Northwestern University alumni]] </textarea><div class="templatesUsed"><div class="mw-templatesUsedExplanation"><p><span id="templatesused">Pages transcluded onto the current version of this page<span class="posteditwindowhelplinks"> (<a href="/wiki/Help:Transclusion" title="Help:Transclusion">help</a>)</span>:</span> </p></div><ul> <li><a href="/wiki/Template:Authority_control" title="Template:Authority control">Template:Authority control</a> (<a href="/w/index.php?title=Template:Authority_control&action=edit" title="Template:Authority control">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Birth_date" title="Template:Birth date">Template:Birth date</a> (<a href="/w/index.php?title=Template:Birth_date&action=edit" title="Template:Birth date">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Br_separated_entries" title="Template:Br separated entries">Template:Br separated entries</a> (<a href="/w/index.php?title=Template:Br_separated_entries&action=edit" title="Template:Br separated entries">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Cite_journal" title="Template:Cite journal">Template:Cite journal</a> (<a href="/w/index.php?title=Template:Cite_journal&action=edit" title="Template:Cite journal">view source</a>) (protected)</li><li><a href="/wiki/Template:Cite_news" title="Template:Cite news">Template:Cite news</a> (<a href="/w/index.php?title=Template:Cite_news&action=edit" title="Template:Cite news">view source</a>) (protected)</li><li><a href="/wiki/Template:Cite_web" title="Template:Cite web">Template:Cite web</a> (<a href="/w/index.php?title=Template:Cite_web&action=edit" title="Template:Cite web">view source</a>) (protected)</li><li><a href="/wiki/Template:Commons_category" title="Template:Commons category">Template:Commons category</a> (<a href="/w/index.php?title=Template:Commons_category&action=edit" title="Template:Commons category">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Count" title="Template:Count">Template:Count</a> (<a href="/w/index.php?title=Template:Count&action=edit" title="Template:Count">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:DMCA" class="mw-redirect" title="Template:DMCA">Template:DMCA</a> (<a href="/w/index.php?title=Template:DMCA&action=edit" class="mw-redirect" title="Template:DMCA">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Dated_maintenance_category" title="Template:Dated maintenance category">Template:Dated maintenance category</a> (<a href="/w/index.php?title=Template:Dated_maintenance_category&action=edit" title="Template:Dated maintenance category">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Dated_maintenance_category_(articles)" title="Template:Dated maintenance category (articles)">Template:Dated maintenance category (articles)</a> (<a href="/w/index.php?title=Template:Dated_maintenance_category_(articles)&action=edit" title="Template:Dated maintenance category (articles)">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Death_date_and_age" title="Template:Death date and age">Template:Death date and age</a> (<a href="/w/index.php?title=Template:Death_date_and_age&action=edit" title="Template:Death date and age">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:FULLROOTPAGENAME" title="Template:FULLROOTPAGENAME">Template:FULLROOTPAGENAME</a> (<a href="/w/index.php?title=Template:FULLROOTPAGENAME&action=edit" title="Template:FULLROOTPAGENAME">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Hlist/styles.css" title="Template:Hlist/styles.css">Template:Hlist/styles.css</a> (<a href="/w/index.php?title=Template:Hlist/styles.css&action=edit" title="Template:Hlist/styles.css">view source</a>) (protected)</li><li><a href="/wiki/Template:If_empty" title="Template:If empty">Template:If empty</a> (<a href="/w/index.php?title=Template:If_empty&action=edit" title="Template:If empty">view source</a>) (protected)</li><li><a href="/wiki/Template:If_then_show" title="Template:If then show">Template:If then show</a> (<a href="/w/index.php?title=Template:If_then_show&action=edit" title="Template:If then show">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Infobox" title="Template:Infobox">Template:Infobox</a> (<a href="/w/index.php?title=Template:Infobox&action=edit" title="Template:Infobox">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Infobox_person" title="Template:Infobox person">Template:Infobox person</a> (<a href="/w/index.php?title=Template:Infobox_person&action=edit" title="Template:Infobox person">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Infobox_scientist" title="Template:Infobox scientist">Template:Infobox scientist</a> (<a href="/w/index.php?title=Template:Infobox_scientist&action=edit" title="Template:Infobox scientist">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:MONTHNAME" title="Template:MONTHNAME">Template:MONTHNAME</a> (<a href="/w/index.php?title=Template:MONTHNAME&action=edit" title="Template:MONTHNAME">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:MONTHNUMBER" title="Template:MONTHNUMBER">Template:MONTHNUMBER</a> (<a href="/w/index.php?title=Template:MONTHNUMBER&action=edit" title="Template:MONTHNUMBER">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Main_other" title="Template:Main other">Template:Main other</a> (<a href="/w/index.php?title=Template:Main_other&action=edit" title="Template:Main other">view source</a>) (protected)</li><li><a href="/wiki/Template:Ns_has_subpages" title="Template:Ns has subpages">Template:Ns has subpages</a> (<a href="/w/index.php?title=Template:Ns_has_subpages&action=edit" title="Template:Ns has subpages">view source</a>) (protected)</li><li><a href="/wiki/Template:Pagetype" title="Template:Pagetype">Template:Pagetype</a> (<a href="/w/index.php?title=Template:Pagetype&action=edit" title="Template:Pagetype">view source</a>) (protected)</li><li><a href="/wiki/Template:Plainlist/styles.css" title="Template:Plainlist/styles.css">Template:Plainlist/styles.css</a> (<a href="/w/index.php?title=Template:Plainlist/styles.css&action=edit" title="Template:Plainlist/styles.css">view source</a>) (protected)</li><li><a href="/wiki/Template:Pluralize_from_text" title="Template:Pluralize from text">Template:Pluralize from text</a> (<a href="/w/index.php?title=Template:Pluralize_from_text&action=edit" title="Template:Pluralize from text">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Reflist" title="Template:Reflist">Template:Reflist</a> (<a href="/w/index.php?title=Template:Reflist&action=edit" title="Template:Reflist">view source</a>) (protected)</li><li><a href="/wiki/Template:Reflist/styles.css" title="Template:Reflist/styles.css">Template:Reflist/styles.css</a> (<a href="/w/index.php?title=Template:Reflist/styles.css&action=edit" title="Template:Reflist/styles.css">view source</a>) (protected)</li><li><a href="/wiki/Template:SDcat" title="Template:SDcat">Template:SDcat</a> (<a href="/w/index.php?title=Template:SDcat&action=edit" title="Template:SDcat">view source</a>) (protected)</li><li><a href="/wiki/Template:Short_description" title="Template:Short description">Template:Short description</a> (<a href="/w/index.php?title=Template:Short_description&action=edit" title="Template:Short description">view source</a>) (protected)</li><li><a href="/wiki/Template:Short_description/lowercasecheck" title="Template:Short description/lowercasecheck">Template:Short description/lowercasecheck</a> (<a href="/w/index.php?title=Template:Short_description/lowercasecheck&action=edit" title="Template:Short description/lowercasecheck">view source</a>) (protected)</li><li><a href="/wiki/Template:Side_box" title="Template:Side box">Template:Side box</a> (<a href="/w/index.php?title=Template:Side_box&action=edit" title="Template:Side box">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Sister_project" title="Template:Sister project">Template:Sister project</a> (<a href="/w/index.php?title=Template:Sister_project&action=edit" title="Template:Sister project">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Sister_project/styles.css" title="Template:Sister project/styles.css">Template:Sister project/styles.css</a> (<a href="/w/index.php?title=Template:Sister_project/styles.css&action=edit" title="Template:Sister project/styles.css">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Template_other" title="Template:Template other">Template:Template other</a> (<a href="/w/index.php?title=Template:Template_other&action=edit" title="Template:Template other">view source</a>) (protected)</li><li><a href="/wiki/Template:Use_mdy_dates" title="Template:Use mdy dates">Template:Use mdy dates</a> (<a href="/w/index.php?title=Template:Use_mdy_dates&action=edit" title="Template:Use mdy dates">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Webarchive" title="Template:Webarchive">Template:Webarchive</a> (<a href="/w/index.php?title=Template:Webarchive&action=edit" title="Template:Webarchive">view source</a>) (template editor protected)</li><li><a href="/wiki/Template:Wikidata_image" title="Template:Wikidata image">Template:Wikidata image</a> (<a href="/w/index.php?title=Template:Wikidata_image&action=edit" title="Template:Wikidata image">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Age" title="Module:Age">Module:Age</a> (<a href="/w/index.php?title=Module:Age&action=edit" title="Module:Age">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Arguments" title="Module:Arguments">Module:Arguments</a> (<a href="/w/index.php?title=Module:Arguments&action=edit" title="Module:Arguments">view source</a>) (protected)</li><li><a href="/wiki/Module:Authority_control" title="Module:Authority control">Module:Authority control</a> (<a href="/w/index.php?title=Module:Authority_control&action=edit" title="Module:Authority control">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Authority_control/auxiliary" title="Module:Authority control/auxiliary">Module:Authority control/auxiliary</a> (<a href="/w/index.php?title=Module:Authority_control/auxiliary&action=edit" title="Module:Authority control/auxiliary">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Authority_control/config" title="Module:Authority control/config">Module:Authority control/config</a> (<a href="/w/index.php?title=Module:Authority_control/config&action=edit" title="Module:Authority control/config">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Check_for_clobbered_parameters" title="Module:Check for clobbered parameters">Module:Check for clobbered parameters</a> (<a href="/w/index.php?title=Module:Check_for_clobbered_parameters&action=edit" title="Module:Check for clobbered parameters">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Check_for_unknown_parameters" title="Module:Check for unknown parameters">Module:Check for unknown parameters</a> (<a href="/w/index.php?title=Module:Check_for_unknown_parameters&action=edit" title="Module:Check for unknown parameters">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1" title="Module:Citation/CS1">Module:Citation/CS1</a> (<a href="/w/index.php?title=Module:Citation/CS1&action=edit" title="Module:Citation/CS1">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/COinS" title="Module:Citation/CS1/COinS">Module:Citation/CS1/COinS</a> (<a href="/w/index.php?title=Module:Citation/CS1/COinS&action=edit" title="Module:Citation/CS1/COinS">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Configuration" title="Module:Citation/CS1/Configuration">Module:Citation/CS1/Configuration</a> (<a href="/w/index.php?title=Module:Citation/CS1/Configuration&action=edit" title="Module:Citation/CS1/Configuration">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Date_validation" title="Module:Citation/CS1/Date validation">Module:Citation/CS1/Date validation</a> (<a href="/w/index.php?title=Module:Citation/CS1/Date_validation&action=edit" title="Module:Citation/CS1/Date validation">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Identifiers" title="Module:Citation/CS1/Identifiers">Module:Citation/CS1/Identifiers</a> (<a href="/w/index.php?title=Module:Citation/CS1/Identifiers&action=edit" title="Module:Citation/CS1/Identifiers">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Utilities" title="Module:Citation/CS1/Utilities">Module:Citation/CS1/Utilities</a> (<a href="/w/index.php?title=Module:Citation/CS1/Utilities&action=edit" title="Module:Citation/CS1/Utilities">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/Whitelist" title="Module:Citation/CS1/Whitelist">Module:Citation/CS1/Whitelist</a> (<a href="/w/index.php?title=Module:Citation/CS1/Whitelist&action=edit" title="Module:Citation/CS1/Whitelist">view source</a>) (protected)</li><li><a href="/wiki/Module:Citation/CS1/styles.css" title="Module:Citation/CS1/styles.css">Module:Citation/CS1/styles.css</a> (<a href="/w/index.php?title=Module:Citation/CS1/styles.css&action=edit" title="Module:Citation/CS1/styles.css">view source</a>) (protected)</li><li><a href="/wiki/Module:Date" title="Module:Date">Module:Date</a> (<a href="/w/index.php?title=Module:Date&action=edit" title="Module:Date">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Detect_singular" title="Module:Detect singular">Module:Detect singular</a> (<a href="/w/index.php?title=Module:Detect_singular&action=edit" title="Module:Detect singular">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Disambiguation/templates" title="Module:Disambiguation/templates">Module:Disambiguation/templates</a> (<a href="/w/index.php?title=Module:Disambiguation/templates&action=edit" title="Module:Disambiguation/templates">view source</a>) (protected)</li><li><a href="/wiki/Module:EditAtWikidata" title="Module:EditAtWikidata">Module:EditAtWikidata</a> (<a href="/w/index.php?title=Module:EditAtWikidata&action=edit" title="Module:EditAtWikidata">view source</a>) (protected)</li><li><a href="/wiki/Module:If_empty" title="Module:If empty">Module:If empty</a> (<a href="/w/index.php?title=Module:If_empty&action=edit" title="Module:If empty">view source</a>) (protected)</li><li><a href="/wiki/Module:Infobox" title="Module:Infobox">Module:Infobox</a> (<a href="/w/index.php?title=Module:Infobox&action=edit" title="Module:Infobox">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Infobox/styles.css" title="Module:Infobox/styles.css">Module:Infobox/styles.css</a> (<a href="/w/index.php?title=Module:Infobox/styles.css&action=edit" title="Module:Infobox/styles.css">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:InfoboxImage" title="Module:InfoboxImage">Module:InfoboxImage</a> (<a href="/w/index.php?title=Module:InfoboxImage&action=edit" title="Module:InfoboxImage">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Navbox" title="Module:Navbox">Module:Navbox</a> (<a href="/w/index.php?title=Module:Navbox&action=edit" title="Module:Navbox">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Navbox/configuration" title="Module:Navbox/configuration">Module:Navbox/configuration</a> (<a href="/w/index.php?title=Module:Navbox/configuration&action=edit" title="Module:Navbox/configuration">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Navbox/styles.css" title="Module:Navbox/styles.css">Module:Navbox/styles.css</a> (<a href="/w/index.php?title=Module:Navbox/styles.css&action=edit" title="Module:Navbox/styles.css">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Ns_has_subpages" title="Module:Ns has subpages">Module:Ns has subpages</a> (<a href="/w/index.php?title=Module:Ns_has_subpages&action=edit" title="Module:Ns has subpages">view source</a>) (protected)</li><li><a href="/wiki/Module:Pagetype" title="Module:Pagetype">Module:Pagetype</a> (<a href="/w/index.php?title=Module:Pagetype&action=edit" title="Module:Pagetype">view source</a>) (protected)</li><li><a href="/wiki/Module:Pagetype/config" title="Module:Pagetype/config">Module:Pagetype/config</a> (<a href="/w/index.php?title=Module:Pagetype/config&action=edit" title="Module:Pagetype/config">view source</a>) (protected)</li><li><a href="/wiki/Module:Pagetype/disambiguation" class="mw-redirect" title="Module:Pagetype/disambiguation">Module:Pagetype/disambiguation</a> (<a href="/w/index.php?title=Module:Pagetype/disambiguation&action=edit" class="mw-redirect" title="Module:Pagetype/disambiguation">view source</a>) (protected)</li><li><a href="/wiki/Module:Pagetype/rfd" title="Module:Pagetype/rfd">Module:Pagetype/rfd</a> (<a href="/w/index.php?title=Module:Pagetype/rfd&action=edit" title="Module:Pagetype/rfd">view source</a>) (protected)</li><li><a href="/wiki/Module:Pagetype/setindex" title="Module:Pagetype/setindex">Module:Pagetype/setindex</a> (<a href="/w/index.php?title=Module:Pagetype/setindex&action=edit" title="Module:Pagetype/setindex">view source</a>) (protected)</li><li><a href="/wiki/Module:Pagetype/softredirect" title="Module:Pagetype/softredirect">Module:Pagetype/softredirect</a> (<a href="/w/index.php?title=Module:Pagetype/softredirect&action=edit" title="Module:Pagetype/softredirect">view source</a>) (protected)</li><li><a href="/wiki/Module:ParameterCount" title="Module:ParameterCount">Module:ParameterCount</a> (<a href="/w/index.php?title=Module:ParameterCount&action=edit" title="Module:ParameterCount">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:SDcat" title="Module:SDcat">Module:SDcat</a> (<a href="/w/index.php?title=Module:SDcat&action=edit" title="Module:SDcat">view source</a>) (protected)</li><li><a href="/wiki/Module:Separated_entries" title="Module:Separated entries">Module:Separated entries</a> (<a href="/w/index.php?title=Module:Separated_entries&action=edit" title="Module:Separated entries">view source</a>) (protected)</li><li><a href="/wiki/Module:Side_box" title="Module:Side box">Module:Side box</a> (<a href="/w/index.php?title=Module:Side_box&action=edit" title="Module:Side box">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Side_box/styles.css" title="Module:Side box/styles.css">Module:Side box/styles.css</a> (<a href="/w/index.php?title=Module:Side_box/styles.css&action=edit" title="Module:Side box/styles.css">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:String" title="Module:String">Module:String</a> (<a href="/w/index.php?title=Module:String&action=edit" title="Module:String">view source</a>) (protected)</li><li><a href="/wiki/Module:TableTools" title="Module:TableTools">Module:TableTools</a> (<a href="/w/index.php?title=Module:TableTools&action=edit" title="Module:TableTools">view source</a>) (protected)</li><li><a href="/wiki/Module:Template_wrapper" title="Module:Template wrapper">Module:Template wrapper</a> (<a href="/w/index.php?title=Module:Template_wrapper&action=edit" title="Module:Template wrapper">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Text" title="Module:Text">Module:Text</a> (<a href="/w/index.php?title=Module:Text&action=edit" title="Module:Text">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Unsubst" title="Module:Unsubst">Module:Unsubst</a> (<a href="/w/index.php?title=Module:Unsubst&action=edit" title="Module:Unsubst">view source</a>) (protected)</li><li><a href="/wiki/Module:Wd" title="Module:Wd">Module:Wd</a> (<a href="/w/index.php?title=Module:Wd&action=edit" title="Module:Wd">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Wd/i18n" title="Module:Wd/i18n">Module:Wd/i18n</a> (<a href="/w/index.php?title=Module:Wd/i18n&action=edit" title="Module:Wd/i18n">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Webarchive" title="Module:Webarchive">Module:Webarchive</a> (<a href="/w/index.php?title=Module:Webarchive&action=edit" title="Module:Webarchive">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Webarchive/data" title="Module:Webarchive/data">Module:Webarchive/data</a> (<a href="/w/index.php?title=Module:Webarchive/data&action=edit" title="Module:Webarchive/data">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:WikidataIB" title="Module:WikidataIB">Module:WikidataIB</a> (<a href="/w/index.php?title=Module:WikidataIB&action=edit" title="Module:WikidataIB">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:WikidataIB/nolinks" title="Module:WikidataIB/nolinks">Module:WikidataIB/nolinks</a> (<a href="/w/index.php?title=Module:WikidataIB/nolinks&action=edit" title="Module:WikidataIB/nolinks">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:WikidataIB/titleformats" title="Module:WikidataIB/titleformats">Module:WikidataIB/titleformats</a> (<a href="/w/index.php?title=Module:WikidataIB/titleformats&action=edit" title="Module:WikidataIB/titleformats">view source</a>) (template editor protected)</li><li><a href="/wiki/Module:Wikitext_Parsing" title="Module:Wikitext Parsing">Module:Wikitext Parsing</a> (<a href="/w/index.php?title=Module:Wikitext_Parsing&action=edit" title="Module:Wikitext Parsing">view source</a>) (protected)</li><li><a href="/wiki/Module:Yesno" title="Module:Yesno">Module:Yesno</a> (<a href="/w/index.php?title=Module:Yesno&action=edit" title="Module:Yesno">view source</a>) (protected)</li></ul></div><p id="mw-returnto">Return to <a href="/wiki/Charles_David_Keeling" title="Charles David Keeling">Charles David Keeling</a>.</p> <noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/wiki/Charles_David_Keeling">https://en.wikipedia.org/wiki/Charles_David_Keeling</a>"</div></div> <div id="catlinks" class="catlinks catlinks-allhidden" data-mw="interface"></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> </ul> <ul id="footer-places"> <li id="footer-places-privacy"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Privacy_policy">Privacy policy</a></li> <li id="footer-places-about"><a href="/wiki/Wikipedia:About">About Wikipedia</a></li> <li id="footer-places-disclaimers"><a href="/wiki/Wikipedia:General_disclaimer">Disclaimers</a></li> <li id="footer-places-contact"><a href="//en.wikipedia.org/wiki/Wikipedia:Contact_us">Contact Wikipedia</a></li> <li id="footer-places-wm-codeofconduct"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Universal_Code_of_Conduct">Code of Conduct</a></li> <li id="footer-places-developers"><a href="https://developer.wikimedia.org">Developers</a></li> <li id="footer-places-statslink"><a href="https://stats.wikimedia.org/#/en.wikipedia.org">Statistics</a></li> <li id="footer-places-cookiestatement"><a href="https://foundation.wikimedia.org/wiki/Special:MyLanguage/Policy:Cookie_statement">Cookie statement</a></li> <li id="footer-places-mobileview"><a href="//en.m.wikipedia.org/w/index.php?title=Charles_David_Keeling&action=edit&mobileaction=toggle_view_mobile" class="noprint stopMobileRedirectToggle">Mobile view</a></li> </ul> <ul id="footer-icons" class="noprint"> <li id="footer-copyrightico"><a href="https://wikimediafoundation.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><img src="/static/images/footer/wikimedia-button.svg" width="84" height="29" alt="Wikimedia Foundation" lang="en" loading="lazy"></a></li> <li id="footer-poweredbyico"><a href="https://www.mediawiki.org/" class="cdx-button cdx-button--fake-button cdx-button--size-large cdx-button--fake-button--enabled"><picture><source media="(min-width: 500px)" srcset="/w/resources/assets/poweredby_mediawiki.svg" width="88" height="31"><img src="/w/resources/assets/mediawiki_compact.svg" alt="Powered by MediaWiki" width="25" height="25" loading="lazy"></picture></a></li> </ul> </footer> </div> </div> </div> <div class="vector-header-container vector-sticky-header-container"> <div id="vector-sticky-header" class="vector-sticky-header"> <div class="vector-sticky-header-start"> <div class="vector-sticky-header-icon-start vector-button-flush-left vector-button-flush-right" aria-hidden="true"> <button class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-sticky-header-search-toggle" tabindex="-1" data-event-name="ui.vector-sticky-search-form.icon"><span class="vector-icon mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Search</span> </button> </div> <div role="search" class="vector-search-box-vue vector-search-box-show-thumbnail vector-search-box"> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail"> <form action="/w/index.php" id="vector-sticky-search-form" class="cdx-search-input cdx-search-input--has-end-button"> <div class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Search Wikipedia"> <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Special:Search"> </div> <button class="cdx-button cdx-search-input__end-button">Search</button> </form> </div> </div> </div> <div class="vector-sticky-header-context-bar"> <div class="vector-sticky-header-context-bar-primary" aria-hidden="true" >View source for Charles David Keeling</div> </div> </div> <div class="vector-sticky-header-end" aria-hidden="true"> <div class="vector-sticky-header-icons"> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-talk-sticky-header" tabindex="-1" data-event-name="talk-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbles mw-ui-icon-wikimedia-speechBubbles"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-subject-sticky-header" tabindex="-1" data-event-name="subject-sticky-header"><span class="vector-icon mw-ui-icon-article mw-ui-icon-wikimedia-article"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-history-sticky-header" tabindex="-1" data-event-name="history-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-history mw-ui-icon-wikimedia-wikimedia-history"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only mw-watchlink" id="ca-watchstar-sticky-header" tabindex="-1" data-event-name="watch-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-star mw-ui-icon-wikimedia-wikimedia-star"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-edit-sticky-header" tabindex="-1" data-event-name="wikitext-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-wikiText mw-ui-icon-wikimedia-wikimedia-wikiText"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-ve-edit-sticky-header" tabindex="-1" data-event-name="ve-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-edit mw-ui-icon-wikimedia-wikimedia-edit"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-viewsource-sticky-header" tabindex="-1" data-event-name="ve-edit-protected-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-editLock mw-ui-icon-wikimedia-wikimedia-editLock"></span> <span></span> </a> </div> <div class="vector-sticky-header-buttons"> <button class="cdx-button cdx-button--weight-quiet mw-interlanguage-selector" id="p-lang-btn-sticky-header" tabindex="-1" data-event-name="ui.dropdown-p-lang-btn-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-language mw-ui-icon-wikimedia-wikimedia-language"></span> <span>Add languages</span> </button> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive" id="ca-addsection-sticky-header" tabindex="-1" data-event-name="addsection-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbleAdd-progressive mw-ui-icon-wikimedia-speechBubbleAdd-progressive"></span> <span>Add topic</span> </a> </div> <div class="vector-sticky-header-icon-end"> <div class="vector-user-links"> </div> </div> </div> </div> </div> <div class="vector-settings" id="p-dock-bottom"> <ul></ul> </div><script>(RLQ=window.RLQ||[]).push(function(){mw.config.set({"wgHostname":"mw-web.codfw.main-b766959bd-62rdk","wgBackendResponseTime":379,"wgPageParseReport":{"limitreport":{"cputime":"0.069","walltime":"0.093","ppvisitednodes":{"value":418,"limit":1000000},"postexpandincludesize":{"value":17740,"limit":2097152},"templateargumentsize":{"value":6556,"limit":2097152},"expansiondepth":{"value":9,"limit":100},"expensivefunctioncount":{"value":0,"limit":500},"unstrip-depth":{"value":0,"limit":20},"unstrip-size":{"value":469,"limit":5000000},"entityaccesscount":{"value":0,"limit":400},"timingprofile":["100.00% 64.803 1 -total"," 99.84% 64.701 2 Template:Blocked_text"," 44.47% 28.821 1 Template:Colocationwebhost"," 40.07% 25.966 1 Template:Hidden"," 35.58% 23.057 2 Template:Replace"," 18.31% 11.868 1 Template:Hidden_begin"," 14.99% 9.712 1 Template:Tlx"," 2.70% 1.747 1 Template:Hidden_end"," 2.46% 1.591 1 MediaWiki:Wikimedia-globalblocking-blockedtext-mistake"," 1.96% 1.267 1 MediaWiki:Wikimedia-globalblocking-blockedtext-mistake-email-steward"]},"scribunto":{"limitreport-timeusage":{"value":"0.012","limit":"10.000"},"limitreport-memusage":{"value":1043413,"limit":52428800}},"cachereport":{"origin":"mw-web.codfw.main-b766959bd-62rdk","timestamp":"20250217063300","ttl":2592000,"transientcontent":false}}});});</script> </body> </html>