Sour milk, sourer grapes and the unnatural greenhouse effect

By Christopher Monckton of Brenchley I am most grateful to Bob Irvine, in a recent column here, for repeating a point that I have tried to make many times, to squeaks of futile protest from assorted busybodies and concern trolls: the total feedback response until 1850 should not, as at present, be allocated solely to…

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How Lord Monckton’s Conundrum can be used to calculate maximum climate sensitivity to CO2

Thought Experiment; Guest post by Bob Irvine How Lord Monckton’s Conundrum can be used to calculate maximum climate sensitivity to CO2. What follows is a discussion only. Introduction; The IPCC defines Equilibrium Climate Sensitivity (ECS) “…as the global average surface warming following a doubling of carbon dioxide concentrations. It is likely to be in the…

Gregory et al 2019: Unsound claims about bias in climate feedback and climate sensitivity estimation

Reposted from Dr. Judith Curry’s Climate Etc. Posted on October 18, 2019 by niclewis | By Nic Lewis The recently published open-access paper “How accurately can the climate sensitivity to CO2 be estimated from historical climate change?” by Gregory et al.[i] makes a number of assertions, many uncontentious but others in my view unjustified, misleading…

Radiation versus Temperature

Guest Post by Willis Eschenbach [SEE UPDATE AT THE END] Due to the recent posts by Lord Monkton and Nick Stokes, I’ve been thinking about the relationship between radiation and temperature. So I turned to the CERES dataset. Here is a scatterplot of the monthly global average surface temperature versus the monthly global average downwelling…

What’s the worst case? Climate sensitivity

Posted on April 1, 2019 by curryja | Reposted from Climate Etc. by Judith Curry Are values of equilibrium climate sensitivity > 4.5 C plausible? For background, see these previous posts on climate sensitivity [link] Here are some possibilistic arguments related to climate sensitivity.  I don’t think the ECS example is the best one to…

Cliff Mass: victim of academic political bullying

Reposted from Judith Curry’s Climate Etc. by Judith Curry There is a disturbing story coming out of the University of Washington surrounding Cliff Mass. In preparing this article, I have received material from a member of the Department of Atmospheric Sciences at the University of Washington. I also ran into another member of the Department…

New CERES Data

Guest Post by Willis Eschenbach Every fall, there’s good news in the world of satellite information, because the CERES satellite folks add one more year’s worth of data to their full dataset. So I went and downloaded the whole 18 years worth, which is close to a full gigabyte of data … The other good…

Warming patterns are unlikely to explain low historical estimates of climate sensitivity

By Nic Lewis Plain language summary A new paper led by a UK Met Office scientist claims that accounting for the difference in the spatial pattern of surface temperature change between that in the historical period and that projected under long-term CO2-forcing substantially increases historical estimates of climate sensitivity. The claims are based on simulations…