Title Title
Fact Check: US Senator Feinstein's claim on temperature rise at Lake Tahoe Fact Check: US Senator Feinstein's claim on temperature rise at Lake Tahoe
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U.S. Senator Sen Dianne Feinstein wrote a <a href="https://twitter.com/SenFeinstein/status/1026898383833714688">tweet</a> on august 7, claiming the following: U.S. Senator Sen Dianne Feinstein wrote a <a href="https://twitter.com/SenFeinstein/status/1026898383833714688">tweet</a> on august 7, claiming the following:
"Lake Tahoe is warming faster than the oceans, 14 times faster than the historical average. We must #ActOnClimate if we want to save the lake! #TahoeSummit"  
https://twitter.com/SenFeinstein/status/1026898383833714688 https://twitter.com/SenFeinstein/status/1026898383833714688
<strong>Claim:</strong> <strong>Claim:</strong>
Lake Tahoe is warming 14 times faster than the historical average. Lake Tahoe is warming 14 times faster than the historical average.
<strong>Fact check: False</strong> <strong>Fact check: False</strong>
The UC Davis Tahoe Environmental Research Center posts a public annual report about the state of the lake. The UC Davis Tahoe Environmental Research Center posts a public annual report about the state of the lake.
The <a href="http://terc.ucdavis.edu/stateofthelake/sotl-reports/2016/2016sotl_complete.pdf">Tahoe: State of the lake report 2016</a> reports that in the last 4 years the lake has warmed at an alarming rate of over 0.3 °F/year. That is 15 times faster than the long-term warming rate. The <a href="http://terc.ucdavis.edu/stateofthelake/sotl-reports/2016/2016sotl_complete.pdf">Tahoe: State of the lake report 2016</a> reports that in the last 4 years the lake has warmed at an alarming rate of over 0.3 °F/year. That is 15 times faster than the long-term warming rate.
The <a href="http://terc.ucdavis.edu/stateofthelake/sotl-reports/2017/2017-sotl-complete.pdf">report from 2017</a> states that in the last 4 years the lake has warmed at an alarming rate of over 0.5 °F/year, 14 times faster than the long-term warming rate. The <a href="http://terc.ucdavis.edu/stateofthelake/sotl-reports/2017/2017-sotl-complete.pdf">report from 2017</a> states that in the last 4 years the lake has warmed at an alarming rate of over 0.5 °F/year, 14 times faster than the long-term warming rate.
These two reports seem to support the claim from the Senator. However the most recent <a href="http://terc.ucdavis.edu/stateofthelake/sotl-reports/2018/SOTL_complete.pdf">report from 2018</a> shows that the volume-averaged temperature increased by only 0.04 °F over the previous year. Since 2012, the average temperature of the lake has warmed by 1.1 °F. That is rate of 0.18 °F/year. This is not 14 times faster than the long-term warming rate. These two reports seem to support the claim from the Senator. However the most recent <a href="http://terc.ucdavis.edu/stateofthelake/sotl-reports/2018/SOTL_complete.pdf">report from 2018</a> shows that the volume-averaged temperature increased by only 0.04 °F over the previous year. Since 2012, the average temperature of the lake has warmed by 1.1 °F. That is rate of 0.18 °F/year. This is not 14 times faster than the long-term warming rate.
The statement from Senator Feinstein is thus false for the year 2018. The statement from Senator Feinstein is thus false for the year 2018.
[caption id="attachment_83461" align="alignleft" width="620"]<img class="size-medium wp-image-83461" src="https://s3-eu-west-1.amazonaws.com/wikitribune-uploads-master/2018/08/10201900/Annual-average-water-temperature-Lake-Tahoe-2018-620x353.png" alt="" width="620" height="353" /> Annual average water temperature Lake Tahoe 2018[/caption] [caption id="attachment_83461" align="alignleft" width="620"]<img class="size-medium wp-image-83461" src="https://s3-eu-west-1.amazonaws.com/wikitribune-uploads-master/2018/08/10201900/Annual-average-water-temperature-Lake-Tahoe-2018-620x353.png" alt="" width="620" height="353" /> Annual average water temperature Lake Tahoe 2018[/caption]
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