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Data.GISS: GISS Surface Temperature Analysis (v4): Global Maps
<!DOCTYPE HTML><html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=utf-8" /> <link rel="stylesheet" type="text/css" href="https://www.giss.nasa.gov/css/css2104.css" media="all" /> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <title>Data.GISS: GISS Surface Temperature Analysis (v4): Global Maps</title> <link rel="stylesheet" href="css/maps-setup.css"> <link rel="apple-touch-icon" href="/gfx/apple-touch-icon-180x180.png" /> <link rel="apple-touch-icon-precomposed" href="/gfx/apple-touch-icon-180x180.png" /> <link rel="apple-touch-icon" sizes="192x192" href="/gfx/apple-touch-icon-192x192.png" /> <link rel="apple-touch-icon" sizes="180x180" href="/gfx/apple-touch-icon-180x180.png" /> <link rel="apple-touch-icon" sizes="152x152" href="/gfx/apple-touch-icon-152x152.png" /> <link rel="apple-touch-icon" sizes="128x128" href="/gfx/apple-touch-icon-128x128.png" /> <link rel="apple-touch-icon" sizes="76x76" href="/gfx/apple-touch-icon-76x76.png" /> <meta name="orgcode" content="611" /> <meta name="rno" content="Gavin.A.Schmidt.1" /> <meta name="content-owner" content="Robert.B.Schmunk.1" /> <meta name="webmaster" content="Robert.B.Schmunk.1" /> <meta name="viewport" content="width=956, initial-scale=1" /><script id="_fed_an_ua_tag" src="https://dap.digitalgov.gov/Universal-Federated-Analytics-Min.js?agency=NASA&subagency=GISS&yt=true&dclink=true" async="async"></script> </head> <body> <div id="bkg1"><div id="bkg2"></div><!-- end bkg2 --></div><!-- end bkg1 --> <div id="page"> <div class="hidden"> <a href="#content" title="Go to Main Content" accesskey="2">Go to Main Content (Accesskey 2)</a><br /><a href="#nav" title="Go to Site Menu" accesskey="3">Go to Site Menu (Accesskey 3)</a></div><!-- end hidden --> <div id="header"> <div id="headerlogo"> <a href="https://www.nasa.gov/"><img src="https://www.giss.nasa.gov/gfx/2013/nasa_x2.png" alt="NASA Logo, National Aeronautics and Space Administration" style="width:140px;height:98px" /></a></div><!-- end headerlogo --> <div id="centername"> <h1><a href="https://www.nasa.gov/">National Aeronautics and Space Administration</a></h1> <h2><a href="https://www.giss.nasa.gov/">Goddard Institute for Space Studies</a></h2></div><!-- end centername --> <div id="hierarchy"> <h2><a href="https://www.nasa.gov/goddard/">Goddard Space Flight Center</a><br /><a href="https://science.gsfc.nasa.gov/sci">Sciences and Exploration Directorate</a><br /><a href="https://science.gsfc.nasa.gov/earth">Earth Sciences Division</a></h2></div><!-- end hierarchy --></div><!-- end header --> <div id="paper" class="widepage"> <div id="content"><div id="cpad"> <h2>GISS Surface Temperature Analysis (v4)</h2> <h3>Global Maps</h3> <p> Select parameters on the following form to create a surface temperature anomaly or trend map. An explanation of the input elements appears <a href="#inputelements">at the bottom of this page</a>. <i>Note that generating figures takes 5 or 6 seconds; please be patient</i>. </p> <div class="floatcenter"> <form id="map_form" action="/cgi-bin/gistemp/amaps.cgi" method="POST"> <table> <tr> <th scope="row" rowspan="3" class="rowlabel" style="vertical-align:top; padding-top: 10px;">Data Sources:</th> <td style="vertical-align:top"> <label for="form_sat">Land Surface Air Temperature <span style="display:none">Data Source</span></label>: <select name="sat" id="form_sat"> <option value="0">none</option> <option selected="selected" value="4">GHCNv4</option> <!-- <option id="airs" value="5">AIRS</option> --> <!-- <option value="3">GHCNv3/SCAR</option> --> </select><br/> <label id="form_sst_text" for="form_sst">Sea Surface Temperature: <span style="display:none">Data Source</span></label> <select name="sst" id="form_sst"> <option value="0">none</option> <option value="1">Hadl/Reyn_v2</option> <!-- <option value="3">ERSST_v3b</option> <option value="6">ERSST_v4</option> --> <option selected="selected" value="7">ERSST_v5</option> </select> </td> </tr> <tr> <td> <span style="font-weight:bold">or</span> </td> </tr> <tr> <td> <label id="form_airs_text" for="form_airs">Remote Sensed Surface Temperature Anomaly: <span style="display:none">Data Source</span></label> <select name="airs" id="form_airs"> <option selected="selected" value="0">none</option> <option value="5">AIRS_v7</option> <option value="6">AIRS_v6</option> </select> </td> </tr> <tr> <th scope="row" class="rowlabel"><label for="form_type">Map Type:</label></th> <td> <select name="type" id="form_type"> <option selected="selected" value="anoms">Anomalies</option> <option value="trends">Trends</option> </select> </td> </tr> <tr> <th scope="row" class="rowlabel"><label for="form_mean_gen">Mean Period</label>:</th> <td> <select name="mean_gen" id="form_mean_gen"> <optgroup label="Calendar Year or Quarter"> <option value="0112">Annual (Jan-Dec)</option> <option value="0103">1st Quarter (Jan-Mar)</option> <option value="0403">2nd Quarter (Apr-Jun)</option> <option value="0703">3rd Quarter (Jul-Sep)</option> <option value="1003">4th Quarter (Oct-Dec)</option> <optgroup label="Nov-Oct Year or Hot/Cold Season"> <option value="1112">Annual (Nov-Oct)</option> <option value="1106">NH Cold Season (Nov-Apr)</option> <option value="0506">NH Warm Season (May-Oct)</option> </optgroup> <optgroup label="Meteorological Year or Season"> <option value="1212">Annual (Dec-Nov)</option> <option value="1203">NH Winter (Dec-Feb)</option> <option value="0303">NH Spring (Mar-May)</option> <option value="0603">NH Summer (Jun-Aug)</option> <option value="0903">NH Fall (Sep-Nov)</option> </optgroup> <optgroup label="Calendar Month"> <option value="01">Jan</option> <option value="02">Feb</option> <option value="03">Mar</option> <option value="04">Apr</option> <option value="05">May</option> <option value="06">Jun</option> <option value="07">Jul</option> <option value="08">Aug</option> <option value="09">Sep</option> <option value="10">Oct</option> <option value="11">Nov</option> <option value="12">Dec</option> </optgroup> </select> </td> </tr> <tr> <th scope="row" class="rowlabel">Time Interval:</th> <td> <label for="form_year1">Begin <span style="display:none">Time Interval Year</span></label> <input type="number" id="form_year1" name="year1" min="1880" value=""/> — <label for="form_year2">End <span style="display:none">Time Interval Year</span></label> <input type="number" id="form_year2" name="year2" min="1880" value=""/> </td> </tr> <tr id="base_period"> <th scope="row" class="rowlabel">Base Period:</th> <td> <label for="form_base1">Begin <span style="display:none">Base Period Year</span></label> <input type="number" id="form_base1" name="base1" min="1880" value="1951"/> — <label for="form_base2">End <span style="display:none">Base Period Year</span></label> <input type="number" id="form_base2" name="base2" min="1880" value="1980"/> </td> </tr> <tr> <th scope="row" id="form_radius_text" class="rowlabel"><label for="form_radius">Smoothing Radius</label>:</th> <td> <select name="radius" id="form_radius"> <option value="250">250 km</option> <option value="1200" selected="selected">1200 km</option> </select> </td> </tr> <tr> <th scope="row" class="rowlabel"><label for="form_pol">Map Projection</label>:</th> <td> <select name="pol" id ="form_pol"> <option value="reg">Equirectangular</option> <option value="pol">Polar Orthographic</option> <option value="rob" selected="selected">Robinson</option> </select> </td> </tr> <!-- <tr> <th scope="row" class="rowlabel">Separate Page:</th> <td> <input name="new_page" type="checkbox"> </td> </tr> --> <tr> <td colspan="2" style="text-align:center"><input type="submit" value="Make Map"/></td> </tr> </table> </form> </div> <div id="map_results"></div> <h4 style="clear: both; margin-top:12px" id="inputelements">Notes Concerning the Maps:</h4> <ul> <li>The number at the top right-hand corner of the map plot is an estimate for the global mean of the calculated field; it may be slightly different from the announced GISTEMP index because an alternative method is used to deal with missing data. See <a href="/gistemp/FAQ.html#q212">the FAQ</a> for further explanation. Note that if the map only shows ocean data (Land: none), the mean is computed only over the area with data.</li> <li>The end points of the scale colorbar have defaults (-4.1°, 4.1°). Either or both is replaced if the min and/or max value of the data is outside that range.</li> </ul> <hr /> <h4>Input Elements:</h4> <ul> <li><b>Data Sources: Land Surface Air Temperature</b> <ul> <li>None: NO land temperature data are used</li> <!-- <li>GISS analysis based on GHCN v3/SCAR (updated each month) (<a href="https://pubs.giss.nasa.gov/abs/ha00510u.html">Hansen et al. 2010</a> and <a href="/gistemp/updates_v3/">Updates to Analysis (v3)</a>) </li>--> <li>GHCNv4: GISS analysis based on GHCN v4 (updated each month) (<a href="/gistemp/updates_v4/">Updates to Analysis (v4)</a>) </li> </ul> </li> <li><b>Data Sources: Sea Surface Temperature</b> <ul> <li>None: NO ocean temperature data are used</li> <li>Hadl/Reyn_v2: SST 1880-present -- 1880-11/1981: Hadley HadISST1, ship and buoy data (Rayner 2000); 12/1981-present: <a href="ftp://ftp.cpc.ncep.noaa.gov/precip/PORT/sst/oimonth_v2/">OISST v. 2, satellite data</a> (Reynolds-Rayner-Smith 2001) </li> <!-- <li>ERSST_v3b: NOAA/NCEI's Extended Reconstructed Sea Surface Temperature (ERSST) v. 3b </li> <li>ERSST_v4: NOAA/NCEI's Extended Reconstructed Sea Surface Temperature (ERSST) v. 4 </li> --> <li>ERSST_v5: NOAA/NCEI's Extended Reconstructed Sea Surface Temperature (ERSST) v. 5 </li> </ul> </li> <li><b>Data Sources: Remote Sensed Surface Temperature Anomaly (<a href="https://airs.jpl.nasa.gov/index.html">AIRS Homepage</a>)</b> <ul> <li>AIRSv6: AIRS/Aqua L3 Monthly Standard Physical Retrieval 1 degree x 1 degree V006 (<a href="https://disc.gsfc.nasa.gov/datasets/AIRS3STM_006/summary?keywords=AIRS%20L3">AIRSv6 Data</a>) </li> <li>AIRSv7: AIRS/Aqua L3 Monthly Standard Physical Retrieval 1 degree x 1 degree V7.0 (<a href="https://disc.gsfc.nasa.gov/datasets/AIRS3STM_7.0/summary?keywords=AIRS%20L3">AIRSv7 Data</a>) </li> </ul> </li> <li><b>Map type:</b> <ul> <li><b>Anomalies:</b> Mean temperature (°C) averaged over a specified <b>mean period</b> and <b>time interval</b> relative to a given <b>base period</b>. </li> <li><b>Trends:</b> Temperature change (°C) of a specified <b>mean period</b> over a specified <b>time interval</b> based on local linear trends. </li> </ul> </li> <li><b>Mean period:</b> Any monthly, seasonal (3 month or 6 month) or annual mean.<br/> Period is declared missing, unless >50% of data are available.</li> <li><b>Time interval:</b> Years over which temperatures are averaged or trends are found.<br/> <b>Note: If the mean period straddles 2 years, fill in the LATER year for both Begin AND End.</b><br/> Periods <b>may not</b> start before Jan 1880 except for AIRS data, which may not start before September 2002<br/> 'Means' are not reported unless >50% of the needed records are available, <br/> 'Trends' are not reported unless >66% of the needed records are available.</li> <li><b>Base period:</b> Time interval to which anomalies are relative. </li> <li><b>Smoothing radius:</b> Distance over which a station influences regional temperature, either 250 km or 1200 km (standard case = 1200 km).</li> </ul> <h4>References:</h4> <p>Please see the <a href="../references.html">GISTEMP references</a> page for citations to publications related to this research.</p> <h4 class="goback">• Return to <a href="../">GISTEMP homepage</a></h4> <script src="./js/jquery-2.1.4.min.js"></script> <script src="./js/maps-setup.js"></script> <script src="./js/spin.js"></script> <script src="./js/d3.v3.min.js"></script> <script src="./js/mpld3.v0.2.min.js"></script> <div class="clear"></div></div><!-- end cpad --></div><!-- end content --> <div id="nav" class="iconified"><h3><img src="https://www.giss.nasa.gov/gfx/menu_icon1.png" alt="Site Menu" title="Site Menu" class="menuicon" style="width:28px;height:28px" /></h3> <ul id="mnav"> <li><a href="https://www.giss.nasa.gov/">GISS Home</a></li> <li><a href="https://www.giss.nasa.gov/research/">News & Features</a> <ul class="mnav2"> <li><a href="https://www.giss.nasa.gov/research/">News & Features Overview</a></li></ul><!-- end mnav2 --></li> 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