Search Results for: Lewis and Curry

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

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.

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

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.

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

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 … Continue reading

What’s the worst case? Climate sensitivity

by Judith Curry Are values of equilibrium climate sensitivity > 4.5 C plausible?

Inconsistency between historical and future CMIP5 simulations

by Kenneth Fritsch Identification of significant differences between the historical and future CMIP5 simulations for intrinsic climate sensitivities.

New paper suggests historical period estimates of climate sensitivity are not biased low by unusual variability in sea surface temperature patterns

By Nic Lewis An important new paper by Thorsten Mauritsen, Associate Professor at Stockholm University[i] and myself has just been accepted for publication (Lewis and Mauritsen 2020)[ii]. Its abstract reads:

Committed warming and the pattern effect

By Nic Lewis A critique of the paper “Greater committed warming after accounting for the pattern effect”, by Zhou, Zelinka, Dessler and Wang.

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

By Nic Lewis A critique of of a new paper by Andrews  et al., Accounting for changing temperature patterns increases historical estimates of climate sensitivity.

Why Dessler et al.’s critique of energy-budget climate sensitivity estimation is mistaken

By Nic Lewis Plain language summary A new paper by Andrew Dessler et al. claims, based on 100 simulations of the historical period (1850 to date) by the MPI‑ESM1.1 climate model, that estimates of climate sensitivity using the energy-budget method … Continue reading

Hurricanes & climate change: 21st century projections

by Judith Curry Final installment in my series on hurricanes and climate change.

A major problem with the Resplandy et al. ocean heat uptake paper

by Nic Lewis Obviously doubtful claims about new research regarding ocean content reveal how unquestioning Nature, climate scientists and the MSM are.

Climate uncertainty monster: What’s the worst case?

by Judith Curry On possibilities, known neglecteds, and the vicious positive feedback loop between scientific assessment and policy making that has created a climate Frankenstein.

Impact of recent forcing and ocean heat uptake data on estimates of climate sensitivity

by Nic Lewis We have now updated the LC15 paper with a new paper that has been published in the Journal of Climate “The impact of recent forcing and ocean heat uptake data on estimates of climate sensitivity“.  The paper … Continue reading

Sea level rise: what’s the worst case?

by Judith Curry Draft of article to be submitted for journal publication.

Lewis and Curry: Climate sensitivity uncertainty

by Judith Curry Our new paper on climate sensitivity is now published.

Are energy budget climate sensitivity values biased low?

by Nic Lewis In a recently published paper (REA16),[i] Mark Richardson et al. claim that recent observation-based energy budget estimates of the Earth’s transient climate response (TCR) are biased substantially low, with the true value some 24% higher.

Does a new paper really reconcile instrumental and model-based climate sensitivity estimates?

by Nic Lewis A new paper in Science Advances by Cristian Proistosescu and Peter Huybers (hereafter PH17) claims that accounting for the decline in feedback strength over time that occurs in most CMIP5 coupled global climate models (GCMs), brings observationally-based … Continue reading


by Judith Curry Happy New Year!

Climate models for lawyers

by Judith Curry I have been asked to write an Expert Report on climate models. ***SEE UPDATE

Towards reconciling climate sensitivity estimates from climate models and observatiions

by Judith Curry A new paper purports to have resolved the discrepancy between climate response estimates from global climate models versus energy budget models.

Prospects for a Prolonged Slowdown in Global Warming in the Early 21st Century

by Nic Lewis [W]e estimate that the warming slowdown (< 0.1 K/decade trend beginning in 1998) could persist, due to internal variability cooling, through 2020, 2025 or 2030 with probabilities 16%, 11%, and 6%, respectively. – Knutson et al.

How inconstant are climate feedbacks – and does it matter?

by Nic Lewis Kyle Armour has a new paper out in Nature Climate Change: “Energy budget constraints on climate sensitivity in light of inconstant climate feedbacks”.

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

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 … Continue reading

Admitting mistakes in a ‘hostile environment’

by Judith Curry Reflections on Nic Lewis’ audit of the Resplandy et al. paper.

Climate sensitivity in light of the latest energy imbalance evidence

by Frank Bosse Equilibrium climate sensitivity computed from the latest energy imbalance data.