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Search Results for: climate sensitivity
Important new paper challenges IPCC’s claims about climate sensitivity
by Nic Lewis Official estimates of future global warming may be overstated.
An interview with top climate scientist Bjorn Stevens
by Nic Lewis This week Die Zeit published an interview with Bjorn Stevens. Die Zeit is the largest German weekly newspaper (circulation well over one million), and has a highly educated readership.
Compensation between cloud feedback + ECS and aerosol-cloud forcing in CMIP6 models
By Nic Lewis An important paper, Wang et al.[1], on the relationships between cloud feedback, climate sensitivity (ECS) and aerosol-cloud interaction in the latest generation of global climate models (CMIP6) has just been published. The key conclusion of the paper … Continue reading
Posted in climate models, Sensitivity & feedbacks
Disconnect in the relationship between GMST and ECS
by Kenneth Fritsch Abstract. An analysis is presented of he disconnection between the CMIP5 and CMIP6 Historical and Future periods when considering the relationship of the individual model GMST changes and the climate sensitivity. I have included a simple model … Continue reading
Posted in climate models, Sensitivity & feedbacks
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:
Posted in Sensitivity & feedbacks
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
Posted in climate models, Sensitivity & feedbacks, Uncategorized
Tagged climate feedback, climate sensitivity
Climate sensitivity in light of the latest energy imbalance evidence
by Frank Bosse Equilibrium climate sensitivity computed from the latest energy imbalance data.
Posted in Uncategorized
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
Posted in Sensitivity & feedbacks, Uncategorized
Tagged climate feedback, climate sensitivity, regression, statistics
CMIP6 GCMs versus global surface temperatures: ECS discussion
by Nicola Scafetta Two publications examining the equilibrium climate sensitivity (ECS) have recently been published in Climate Dynamics: Scafetta, N. (2022a). CMIP6 GCM ensemble members versus global surface temperatures. Lewis, N. (2022). Objectively combining climate sensitivity evidence.
Posted in Uncategorized
Emergent constraints on TCR and ECS from historical warming in CMIP5 and CMIP6 models
By Nic Lewis This is a brief comment on a new paper[i] by a mathematician in the Exeter Climate Systems group, Femke Nijsse, and two better known colleagues, Peter Cox and Mark Williamson. I note that Earth Systems Dynamics published … Continue reading
Climate Uncertainty and Risk: Table of Contents
by Judith Curry A preview of the contents of my forthcoming book Climate Uncertainty and Risk. Plus an update on the publication process and availability of the paperbook version for pre-orders.
Posted in Uncategorized
The climate ‘crisis’ isn’t what it used to be
by Judith Curry Growing realization by the climate establishment that the threat of future warming has been cut in half over the past 5 years.
Posted in Uncategorized
IPCC AR6: Breaking the hegemony of global climate models
by Judith Curry A rather astonishing conclusion drawn from reading the fine print of the IPCC AR6 WG1 Report.
Posted in Uncategorized
Climate sensitivity calculator app
by Alberto Zaragoza Comendador How sensitive is the Earth’s climate to greenhouse gases? Speaking about carbon dioxide in particular, how much would air temperatures increase if we doubled atmospheric concentrations of said gas?
Posted in Sensitivity & feedbacks
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.
Posted in Sensitivity & feedbacks
Challenges of the clean energy transition
by Judith Curry This morning I participated Conference on Energy and Decarbonization – A New Jersey Business Perspective. https://njbia.regfox.com/energy-summit. UPDATE: full recording of the conference [here]
Posted in Uncategorized
What’s the worst case? Climate sensitivity
by Judith Curry Are values of equilibrium climate sensitivity > 4.5 C plausible?
Posted in Sensitivity & feedbacks
15 minutes
by Judith Curry In a recent invited talk at the American Chemical Society annual meeting, I attempted to explain the climate debate in 15 minutes.
Posted in Uncategorized
Week in review – science edition
by Judith Curry A few things that caught my eye these past few weeks
Posted in Uncategorized
Solar variations controversy
by Judith Curry “The field of Sun-climate relations . . . in recent years has been corrupted by unwelcome political and financial influence as climate change sceptics have seized upon putative solar effects as an excuse for inaction on anthropogenic … Continue reading
Posted in Uncategorized
Climate sensitivity to cumulative carbon emissions
By Nic Lewis An observational estimate of transient (multidecadal) warming relative to cumulative CO2 emissions is little over half that per IPCC AR5 projections. AR5 claims that CO2-caused warming would be undiminished for 1000 years after emissions cease, but observations … Continue reading
Posted in climate models, IPCC, Sensitivity & feedbacks
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.
Posted in climate models, Sensitivity & feedbacks
Week in review – science edition
by Judith Curry A few things that caught my eye these past few weeks.
Posted in Uncategorized, Week in review
Osman et al. 2021: a flawed Nature paleoclimate paper?
By Nic Lewis This article concerns the paper “Globally resolved surface temperatures since the Last Glacial Maximum” by Matthew Osman et al.[2] (hereafter Osman 2021) published by Nature in November 2021.
Posted in Uncategorized
Week in review – climate edition
by Judith Curry A few things that caught my eye these past few weeks
Posted in Uncategorized
