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53 Articles

A Comparison of Tropical Temperature Trends with Model Predictions

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This technical paper compares the tropospheric temperature trends from 22 climate model simulations to observations in the tropics during the satellite era. Modeled temperature trends in the lower atmosphere in the tropics are 100% to 300% higher than observed, and, above 8 km, modeled and observed trends have opposite signs.



Cirrus disappearance: Warming Might Thin Heat-trapping Clouds

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Individual tropical warming cycles that served as proxies for global warming saw a decrease in the coverage of heat-trapping cirrus clouds, says Dr. Roy Spencer. All climate models assume that global warming would increase the cloud cover, resulting in a strong positive feedback. The actual measurements shows a strong negative feedback. If computer models incorporated this enhanced cooling effect from high clouds, "it would reduce estimates of future warming by over 75 percent".



Limits on CO2 Climate Forcing

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The authors examine the satellite temperature anomalies across latitude bands and determine that the maximum climate sensitivity from CO2 is less than the no-feedback sensitivity.



Satellite and Climate Model Evidence Against Substantial Manmade Climate Change

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Dr. Spencer shows, using a new analysis of satellite data, that the climate sensitivity to CO2 is very low. A doubling of CO2 would cause about 0.5 Celsius temperature increase. Climate models have been built with natural climate variability as a guide, during which it has been assumed that observed temperature variability caused the observed cloud variability. But since causation also flows in the opposite direction (cloud variability causing temperature variability), the climate models have a built-in bias toward high climate sensitivity, and so they produce too much global warming.



Computer Climate Models

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Dr. Tim Ball shows that climate models don't work and explains why they fail.




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