Comparison of annual <a href="https://en.wikipedia.org/wiki/Warming_stripes" class="extiw" title="w:Warming stripes">w:Warming stripes</a> from four dataset sources: <a href="https://en.wikipedia.org/wiki/Goddard_Institute_for_Space_Studies" class="extiw" title="w:Goddard Institute for Space Studies">GISS</a>, <a href="https://en.wikipedia.org/wiki/Global_Historical_Climatology_Network" class="extiw" title="w:Global Historical Climatology Network">GHCN</a>-v3, <a href="https://en.wikipedia.org/wiki/HadCRUT" class="extiw" title="w:HadCRUT">HadCRUT</a>4.6.0.0, <a href="https://en.wikipedia.org/wiki/Berkeley_Earth" class="extiw" title="w:Berkeley Earth">Berkeley Earth</a> (all with 1961-1990 reference period).
<p>Datasets that did not have a native "reference period" of 1961-1990 were converted to have such. (Temperature average over the "reference period" determines boundary between blue and red stripes.)
</p><p><i>General notes:</i>
</p>
<ul><li><i>Credit for general concept of <a href="https://en.wikipedia.org/wiki/warming_stripes" class="extiw" title="w:warming stripes">w:warming stripes</a>:</i> climate scientist Ed Hawkins, <a href="https://en.wikipedia.org/wiki/University_of_Reading" class="extiw" title="w:University of Reading">w:University of Reading</a>, U.K.</li>
<li>Data values are visualized using color rather than locations of points on a graph.</li>
<li>The average temperature in reference period 1961-1990 determines boundary between blue and red.</li>
<li>Horizontal scale is time, from 1850 (extreme left) to 2018 (right). Top two panels begin at 1880.</li>
<li>Each hue (up to 8 blue and 8 red) covers a temperature range of 0.1 degrees Celsius.</li>
<li>Data is global (not for a locality).</li>
<li>A thin purple horizontal bar (purposely designed to be visually discreet) shows the reference period for the diagrams</li></ul><p>Full size warming stripes files for the bottom two panels have already been uploaded to Commons, and are linked in their images below. More detailed information is found in the descriptions on those image pages.
</p><p><b>Dataset sources:</b><br></p>
<ul><li><b>Panel 1: NASA / <a href="https://en.wikipedia.org/wiki/Goddard_Institute_for_Space_Studies" class="extiw" title="w:Goddard Institute for Space Studies">GISS</a> (1880-2018)</b><br></li></ul><p><a rel="nofollow" class="external text" href="https://web.archive.org/web/20190708024511/https://climate.nasa.gov/vital-signs/global-temperature/">Global Temperature / Latest Annual Average Anomaly: 2018</a>. <i>climate.nasa.gov</i>. NASA (2019). Archived from <a rel="nofollow" class="external text" href="https://climate.nasa.gov/vital-signs/global-temperature/">the original</a> on <span class="mw-formatted-date" title="2019-07-08">July 8, 2019</span>. Retrieved on <span class="mw-formatted-date" title="2019-07-12">July 12, 2019</span>. "Download Data / Get Data:  HTTP" ● <a rel="nofollow" class="external text" href="https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt">Link to actual data</a> (<a rel="nofollow" class="external text" href="https://web.archive.org/web/20190111113521/https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt">archive</a>). I converted to a reference period of 1961-1990.
</p>
<ul><li><b>Panel 2: <a href="https://en.wikipedia.org/wiki/Global_Historical_Climatology_Network" class="extiw" title="w:Global Historical Climatology Network">GHCN</a>-v3 (1880-2018)</b><br></li></ul><p><a rel="nofollow" class="external text" href="https://web.archive.org/web/20190609145220/https://www.ipcc-data.org/observ/index.html">AR4 Observations / Global mean temperature time series</a>. <i>ipcc-data.org</i>. IPCC Data Distribution Centre (2019). Archived from <a rel="nofollow" class="external text" href="http://www.ipcc-data.org/observ/clim/ar4_global.html">the original</a> on <span class="mw-formatted-date" title="2019-06-09">June 9, 2019</span>. Retrieved on <span class="mw-formatted-date" title="2019-07-11">July 11, 2019</span>. "GISS / Info / Data" ● <a rel="nofollow" class="external text" href="https://data.giss.nasa.gov/gistemp/tabledata_v3/GLB.Ts.txt">Link to actual data</a> (<a rel="nofollow" class="external text" href="https://web.archive.org/web/20190612200556/https://data.giss.nasa.gov/gistemp/tabledata_v3/GLB.Ts.txt">archive</a>). I converted to a reference period of 1961-1990.
</p>
<ul><li><b>Panel 3: <a href="https://en.wikipedia.org/wiki/HadCRUT" class="extiw" title="w:HadCRUT">HadCRUT</a> 4.6.0.0 (1850-2018)</b><br></li></ul><p><a rel="nofollow" class="external text" href="https://web.archive.org/web/20190102231319/https://www.metoffice.gov.uk/hadobs/hadcrut4/index.html">Met Office Hadley Centre observations datasets / HadCRUT 4</a>. <i>metoffice.gov.uk</i>. Met Office (2019). Archived from <a rel="nofollow" class="external text" href="https://www.metoffice.gov.uk/hadobs/hadcrut4/index.html">the original</a> on <span class="mw-formatted-date" title="2019-01-02">January 2, 2019</span>. Retrieved on <span class="mw-formatted-date" title="2019-07-12">July 12, 2019</span>. "Download Data" ● <a rel="nofollow" class="external text" href="https://www.metoffice.gov.uk/hadobs/hadcrut4/data/current/download.html">Link to data download page</a> (under "HadCRUT4 time series: ensemble members" click on "Global (NH+SH)/2) / / Annual / " to download zip file (I used an average of datasets 1-10)(<a rel="nofollow" class="external text" href="https://web.archive.org/web/20190704163425/https://www.metoffice.gov.uk/hadobs/hadcrut4/data/current/download.html">archive</a>).
</p>
<ul><li><b>Panel 4: <a href="https://en.wikipedia.org/wiki/Berkeley_Earth" class="extiw" title="w:Berkeley Earth">Berkeley Earth</a> (1850-2018)</b><br></li></ul><a rel="nofollow" class="external text" href="https://web.archive.org/web/20190629180117/http://berkeleyearth.org/data/">Land + Ocean (1850 – Recent) / Monthly Global Average Temperature (annual summary)</a>. <i>berkeleyearth.lbl.gov</i>. <a href="https://en.wikipedia.org/wiki/Berkeley_Earth" class="extiw" title="w:Berkeley Earth">w:Berkeley Earth</a> (2019). Archived from <a rel="nofollow" class="external text" href="http://berkeleyearth.lbl.gov/auto/Global/Land_and_Ocean_summary.txt">the original</a> on <span class="mw-formatted-date" title="2019-06-29">June 29, 2019</span>. Retrieved on <span class="mw-formatted-date" title="2019-07-04">July 4, 2019</span>. I started with "Annual Anomaly" from under "Land + Ocean anomaly using air temperature above sea ice" and from under "Land + Ocean using water temperature below sea ice" and converted to a reference period of 1961-1990.
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