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What Does Gavin Schmidt’s ‘Warmest’ Year Tell Us About Climate Sensitivity to CO2?

Guest post by Jim Steele, Director emeritus Sierra Nevada Field Campus, San Francisco State University and author of Landscapes & Cycles: An Environmentalist’s Journey to Climate Skepticism A friend of mine who works for the EPA emailed me a link to NASA’s Earth Observatory page pitching 2014 as the warmest year on record, and asked…

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Calculations suggest that Global warming caused by the doubling of CO2 will be less than 0.6K

Guest essay by Saburo Nonogaki It has been said that the averaged earth surface temperature would be 255K if no green-house-effect(g-h-e) gases were contained in the atmosphere, and is 288K at present where the atmosphere contains g-h-e gases. The estimation of 255K is based on the earth’s long-term radiative equilibrium and Stefan-Boltzmann’s law which states…

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The Collection of Evidence for a Lower Climate Sensitivity Continues to Grow – now up to 14 papers lower than IPCC

By Patrick J. Michaels and Paul C. “Chip” Knappenberger Nic Lewis and Judith Curry just published a blockbuster paper that pegs the earth’s equilibrium climate sensitivity—how much the earth’s average surface temperature is expected to rise in association with a doubling of the atmosphere’s carbon dioxide concentration—at 1.64°C (1.05°C to 4.05°C, 90% range), a value…