by Steve Goddard
Summer 2009 in Breckenridge Colorado
Earlier, Anthony reported on a Stanford University report which forecast very hot summers for the four corner states. I found this particularly amusing, because we are having our second cold, rainy July in a row.
Looking at the long term summer trends, NCDC shows no trend in Colorado summer temperatures over the last 80 years. Last summer was the 14th coldest since 1930.
But it gets worse. The NCDC data above showing no trend has been tortured upwards to get to that point.
If we look at less tortured data (the USHCN “raw” data) we see a different story about Colorado temperatures. Below are all of the of Colorado USHCN station (RAW) maximum temperatures since 1930. As you can see, high temperatures have been declining in most of Colorado over the last 80 years, as CO2 has gone from 310 to 390 ppm. The correlation between CO2 and hot days in Colorado is negative, and any study which shows otherwise is deeply flawed.