Category Archives: Sensitivity & feedbacks

Explaining the Discrepancies Between Hausfather et al. (2019) and Lewis&Curry (2018)

Posted on January 17, 2020 by | 209 comments

by Ross McKitrick

Challenging the claim that a large set of climate model runs published since 1970’s are consistent with observations for the right reasons.

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209 Comments

Posted in climate models, Sensitivity & feedbacks

Two more degrees by 2100!

Posted on December 27, 2019 by | 382 comments

by Vaughan Pratt

An alternative perspective on 3 degrees C?

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382 Comments

Posted in Sensitivity & feedbacks

3 degrees C?

Posted on December 23, 2019 by | 258 comments

by Judith Curry

Is 3 C warming over the 21st century now the ‘best estimate’?  A reframing of how we think about climate change over the 21st century, and my arguments for 1 C.

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258 Comments

Posted in Sensitivity & feedbacks

Comment by Cowtan & Jacobs on Lewis & Curry 2018 and Reply: Part 2

Posted on December 20, 2019 by | 67 comments

By Nic Lewis

In an earlier article here I discussed a Comment on Lewis and Curry 2018 (LC18) by Kevin Cowtan and Peter Jacobs (CJ20), and a Reply from myself and Judith Curry recently published by Journal of Climate (copy available here). I wrote that I would defer dealing with the differences between observed and CMIP5 model-simulated historical warming, which formed the basis of CJ20’s numerical analysis, until a subsequent article. I now do so. Continue reading →

67 Comments

Posted in climate models, Sensitivity & feedbacks, Uncategorized

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Comment by Cowtan & Jacobs on Lewis & Curry 2018 and Reply: Part 1

Posted on December 16, 2019 by | 113 comments

By Nic Lewis

A comment on LC18 (recent paper by Lewis and Curry on climate sensitivity)  by Cowtan and Jacobs has been published, along with our response.

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113 Comments

Posted in Sensitivity & feedbacks

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

Posted on October 18, 2019 by | 64 comments

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 or definitely incorrect.

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64 Comments

Posted in Sensitivity & feedbacks, Uncategorized

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What’s the worst case? Climate sensitivity

Posted on April 1, 2019 by | 95 comments

by Judith Curry

Are values of equilibrium climate sensitivity > 4.5 C plausible?

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95 Comments

Posted in Sensitivity & feedbacks