What Does Gavin Schmidt’s ‘Warmest’ Year Tell Us About Climate Sensitivity to CO2?

Watts Up With That?

Guest post by Jim Steele,

Director emeritus Sierra Nevada Field Campus, San Francisco State University and author of Landscapes & Cycles: An Environmentalist’s Journey to Climate Skepticism

A friend of mine who works for the EPA emailed me a link to NASA’s Earth Observatory page pitching 2014 as the warmest year on record, and asked if “I dismiss their findings.” The following is an edited version of my reply suggesting the Global Average Chimera tells us precious little about the climate’s sensitivity to CO2, and the uncertainty is far greater than the error bars illustrated in Anthony Watts post 2014: The Most Dishonest Year on Record.

I simply asked my friend to consider all the factors involved in constructing the global average temperature trend. Then decide for himself the scientific value of the graph and if there was any political motivation.

1. Consider the greatest warmth anomalies are…

View original post 1,280 more words

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