Climate Models Have Been Wrong About Global Warming For Six Decades
Climate models used by scientists to predict how much human activities will warm the planet have been over-predicting global warming for the last six decades, according to a recent working paper by climate scientists.
“Everyone by now is familiar with the ‘pause’ or ‘slowdown’ in the rate of global warming that has taken place over the past 20 years of so, but few realize is that the observed warming rate has been beneath the model mean expectation for periods extending back to the mid-20th century—60+ years,” Patrick Michaels and Chip Knappenberger, climate scientists at the libertarian Cato Institute, write in a working paper released in December.
Michaels and Knappenberger compared observed global surface temperature warming rates since 1950 to what was predicted by 108 climate models used by government climate scientists to predict how much carbon dioxide emissions will warm the planet.
What they found was the models projected much higher warming rates than actually occurred.
To further bolster their case that climate models are over-predicting warming rates, Michaels and Knappenberger looked at how climate models fared against satellite and weather balloon data from
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