Comparison of <a href="https://en.wikipedia.org/wiki/Warming_stripes" class="extiw" title="w:Warming stripes">w:Warming stripes</a> using two different locations, two different datasets (and different color schemes), testing type, reference temperature (determining boundary between blue and red stripes) is unspecified. 
<ul><li>Top panel: <a href="https://en.wikipedia.org/wiki/Azores" class="extiw" title="w:Azores">w:Azores</a>, GISTEMP/250 dataset (NASA), date range 1880-2017, testing air temperatures only</li>
<li>Bottom panel: entire planet, <a href="https://en.wikipedia.org/wiki/Berkeley_Earth" class="extiw" title="w:Berkeley Earth">w:Berkeley Earth</a> dataset, date range 1850-2018, reference temperature (determining boundary between blue and red stripes) is the average of temperatures for 1951-1980, testing land and sea temperatures</li>
<li>The two graphics use different color arrays since they were created by different uploaders</li>
<li>Color scheme of blues in top panel have been adjusted brighter to make a more meaningful comparison with color choice of bottom panel</li>
<li><b>Important: A hue in one diagram does not necessarily represent the same the temperature range as a similar hue in the other diagram</b></li>
<li>Panels are vertically aligned to enable year-by-year comparison</li></ul><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 in the bottom panel (Berkeley Earth). Azores graphic's reference period is unknown.</li>
<li>Horizontal scale is time, from 1850 (left) to 2018 (right) for the bottom (Berkeley Earth) panel.</li>
<li>Each hue (up to 8 blue and 8 red) covers a temperature range of 0.1 degrees Celsius in the bottom (Berkeley Earth) graphic.</li></ul><p><b>Source images and licensing thereof:</b><br></p>
<ul><li>Top panel is derived from <a href="//commons.wikimedia.org/wiki/File:WarmingStripes.png" title="File:WarmingStripes.png">File:Warmingstripes.png</a> created by <a href="//commons.wikimedia.org/wiki/User_talk:Dhenriques62" title="User talk:Dhenriques62">User talk:Dhenriques62</a> and licensed there under the Creative Commons Attribution-Share Alike 4.0 International license.</li>
<li>Bottom panel is from <a href="//commons.wikimedia.org/wiki/File:20190705_Warming_stripes_-_Berkeley_Earth_(world)_-_avg_above-_and_below-ice_readings.png" title="File:20190705 Warming stripes - Berkeley Earth (world) - avg above- and below-ice readings.png">File:20190705 Warming stripes - Berkeley Earth (world) - avg above- and below-ice readings.png</a> created by <a href="//commons.wikimedia.org/wiki/User:RCraig09" title="User:RCraig09">User:RCraig09</a> and licensed there under the Creative Commons Attribution-Share Alike 4.0 International license.</li></ul>
<a href="//commons.wikimedia.org/wiki/User:RCraig09" title="User:RCraig09">RCraig09</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>