Category Archives: Climate models

By Andy May The IPCC believes that the change in solar radiation over the past 60 years nets to zero and has no trend beyond the normal ~11-year solar cycle. Professor David Karoly writes that we can confidently exclude the Sun as a contributor to recent warming because, if it were, the stratosphere would beContinue reading “Atmospheric Fingerprint”

By Andy May It is common for the news media and consensus scientists to report global average surface temperatures without mentioning that both the warming rate and average temperatures vary a lot around the Earth over one year. For example, Earth’s global average surface temperature varies about 7° F every year. The rate also variesContinue reading “Northern and Southern Hemisphere Warming”

By Andy May In the Great Climate Change Debate between Professor David Karoly and Professor Will Happer, Glenn Tamblyn was called upon to finish the consensus side of the debate after Karoly backed out. The details are described in my latest book. The debate contained an illuminating exchange of opinions on satellite versus surface temperatureContinue reading “Satellite and Surface Temperatures”

By Andy May The IPCC AR5 report was published in 2013 and the CMIP5 climate models they used, have been shown to predict faster warming than observed in the tropical troposphere at a statistically significant level by Ross McKitrick and John Christy.[1] This problem is acknowledged and discussed in the latest AR6 report, published inContinue reading “Comparing AR5 to AR6”

By Andy May In my last post, I explained how the IPCC attempts to use climate models to show humans have caused the recent global warming. Models are useful for testing scientific ideas, but they are not proof an idea is correct unless they successfully and accurately predict future events. See the story of ArthurContinue reading “Climate Model Democracy”