Atmospheric Fingerprint

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 Comments on my recent posts concerning HadCRUT5 surface and UAH Lower Troposphere temperatures often degrade to a comparison of the accuracy of RSS and UAH satellite temperatures. Some seem to believe that RSS is more accurate than UAH, when radiosonde data shows the reverse is true. So, this is a short postContinue reading “UAH v RSS”

AR6 and Sea Level, Part 3, A Statistically Valid Forecast

By Andy May In Part 1 of this series, we examined the data and analysis that was presented in AR6 to support their conclusion that sea level rise is accelerating. In Part 2 we looked at a serious examination of the observational record for sea level rise over the past 120 years and the modeledContinue reading “AR6 and Sea Level, Part 3, A Statistically Valid Forecast”

AR6 and Sea Level, Part 2: The complexity of measuring GMSL

By Andy May Thomas Frederikse and colleagues published a study of sea level data, considering both tide gauges and satellite data in 2020 (Frederikse, et al., 2020). This paper is frequently cited in the Chapter 9 AR6 sea level discussion. They found that there are many causes of global and regional sea level change thatContinue reading “AR6 and Sea Level, Part 2: The complexity of measuring GMSL”

Northern and Southern Hemisphere Warming

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”

Satellite and Surface Temperatures

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”

Comparing AR5 to AR6

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”

Climate Model Democracy

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”

Attributing global warming to humans

The featured cartoon is by Josh, who graciously gave me permission to use it, his website is here. This cartoon is in Josh’s 2022 calendar, I think he still has a few to sell. By Andy May My latest book,[1] just released, is about a climate change debate between Professor David Karoly of the UniversityContinue reading “Attributing global warming to humans”

%d bloggers like this: