A colored line graph depicting global average temperatures for 1850-2016.
<ul><li>Vertical scale is temperature</li>
<li>Horizontal scale is month</li>
<li>Color of graph line is year</li></ul><dl><dd></dd></dl><ul><li>Source states:<br></li></ul>
"Technical details: Monthly HadCRUT4.4 global temperatures referenced to ‘pre-industrial’ (defined as mean anomaly from 1850-1900, which is 0.31°C below 1961-1990), plotted using the viridis colour scale to indicate year. ... "
Ed Hawkins, climate scientists at the <a href="https://en.wikipedia.org/wiki/University_of_Reading" class="extiw" title="w:University of Reading">University of Reading</a>
CC BY-SA 4.0
<p>Hawkins, Ed, <a rel="nofollow" class="external text" href="https://web.archive.org/web/20190822163731/https://www.climate-lab-book.ac.uk/2016/global-temperature-changes-since-1850/">Global temperature changes since 1850</a>. <i>Climate Lab Book</i> (<span class="mw-formatted-date" title="2016-04-11">11 April 2016</span>). Archived from <a rel="nofollow" class="external text" href="http://www.climate-lab-book.ac.uk/2016/global-temperature-changes-since-1850/">the original</a> on <span class="mw-formatted-date" title="2019-08-22">22 August 2019</span>.
</p><p>Footer of web page states:<br>
LICENSE<br>
Creative Commons License<br></p>
These blog pages &amp; images are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.