Search Results for: Nic Lewis

2020

by Judith Curry Happy New Year!

Resplandy et al. Part 5: Final outcome

By Nic Lewis The editors of Nature have retracted the Resplandy et al. paper.

Admitting mistakes in a ‘hostile environment’

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

COVID-19: evidence shows that transmission by schoolchildren is low

By Nic Lewis Much fuss has been made in the UK, not least by teachers’ unions, about recommencing physical school attendance. As this issue applies to many countries, I thought it worth highlighting research findings in Europe.

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

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.

A sensible COVID-19 exit strategy for the UK

By Nic Lewis The current approach A study by the COVID-19 Response Team from Imperial College (Ferguson et al. 2020[i]) appears to be largely responsible for driving UK government policy actions. The lockdown imposed in the UK appears, unsurprisingly, to … Continue reading

Is ocean warming accelerating faster than thought?

by Nic Lewis *** UPDATE : response to comments by Zeke Hausfather appended There are a number of statements in Cheng et al. (2019) ‘How fast are the oceans warming’, (‘the paper’) that appear to be mistaken and/or potentially misleading. … Continue reading

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.

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

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

Herd immunity to COVID-19 and pre-existing immune responses

By Nic Lewis I showed in my May 10th article Why herd immunity to COVID-19 is reached much earlier than thought that inhomogeneity within a population in the susceptibility and in the social-connectivity related infectivity of individuals would reduce, in my … Continue reading

Week in review – science edition

by Judith Curry A few things that caught my eye this past week.

Why herd immunity to COVID-19 is reached much earlier than thought – update

By Nic Lewis I showed in my May 10th article Why herd immunity to COVID-19 is reached much earlier than thought that inhomogeneity within a population in the susceptibility and in the social-connectivity related infectivity of individuals would reduce, in my … Continue reading

When does government intervention make sense for COVID-19?

By Nic Lewis Introduction I showed in my last article that inhomogeneity within a population in the susceptibility and infectivity of individuals would reduce the herd immunity threshold, in my view probably very substantially, and that evidence from Stockholm County … Continue reading

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:

COVID-19: why did a second wave occur even in regions hit hard by the first wave?

By Nic Lewis  Introduction Many people, myself included, thought that in the many regions where COVID-19 infections were consistently reducing during the summer, indicating that the applicable herd immunity threshold had apparently been crossed, it was unlikely that a major … Continue reading

Imperial College UK COVID-19 numbers don’t seem to add up

By Nic Lewis Introduction and summary A study published two weeks ago by the COVID-19 Response Team from Imperial College (Ferguson20[1]) appears to be largely responsible for driving UK government policy actions. The study is not peer reviewed; indeed, it … Continue reading

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.

3 degrees C?

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.

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.

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

Interview: Climate Change – A Different Perspective with Judith Curry: Part II

by Judith Curry My follow up interview on the Strong And Free podcast [link].

The progress of the COVID-19 epidemic in Sweden: an analysis

By Nic Lewis The course of the COVID-19 pandemic in Sweden is of great interest, as it is one of very few advanced nations where no lockdown order that heavily restricted people’s movements and other basic freedoms was imposed. As … Continue reading

Why herd immunity to COVID-19 is reached much earlier than thought

By Nic Lewis Introduction A study published in March by the COVID-19 Response Team from Imperial College (Ferguson20[1]) appears to have been largely responsible for driving government actions in the UK and, to a fair extent, in the US and … Continue reading