A global context for Man-made Climate Concerns

Therefore whatever CO2 reductions and sacrifices of wellbeing are made in the Western World will be overtaken and soon exceeded by them. It should be realised that climate change policies…

A fiery past sheds new light on the future of global climate change

Many of today’s climate models rely on past levels of greenhouse gasses and aerosols to validate their predictions for the future. But there’s a problem: While pre-industrial levels of greenhouse…

High end of climate sensitivity in new climate models seen as less plausible

Researchers at Princeton University and the University of Miami reported that newer models with a high “climate sensitivity” — meaning they predict much greater global warming from the same levels…

“USGS Gets Politics Out of Climate Forecasts”

Guest “another thing lost in the November coup” by David Middleton USGS Director Jim Reilly authored a recent opinion piece in the Wall Street Journal… USGS Gets Politics Out of…

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

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:

Climate Models Have Not Improved in 50 Years

Guest “how can he write this with straight face?” by David Middleton Even 50-year-old climate models correctly predicted global warmingBy Warren Cornwall Dec. 4, 2019 Climate change doubters have a…

More Junk Science From the AAAS of A: Bird Apocalypse Edition

Guest Science! (as in “she blinded me with”) critique by David Middleton One of the best things about my morning emails from the American Association for the Advancement of Science…

Putting It On The Line

Guest Post by Willis Eschenbach Thanks to an alert commenter, half of my last post was shown to be in error. Like most folks, I really, really hate to be…

Pre- and Post-Feedback Sensitivity

Guest Post by Willis Eschenbach [UPDATE TWO: Rather than trying to cooper up the errors, I have simply removed the incorrect sections and left the calculation of the Planck feedback intact. I…

Monday Mirthiness – More 'skeptical science' kids scienz

Josh writes: Nic Lewis has a very amusing comment over at Lucia’s about a paper written by Gavin Cawley, Kevin Cowtan, Robert Way, Peter Jacobs and Ari Jokimäki – all part of…

The Shindell climate sensitivity paper: another 'GISS miss'

There was lots of breathless anticipation last week over the Drew Shindell paper on climate sensitivity, which was embargoed until 1800GMT on Sunday (see the embargoed PR from Nature here),…

The Lewis and Crok exposition – Climate less sensitive to Carbon Dioxide than most models suggest

Full papers plus additional comments from co-author Nic Lewis follow. I have added some relevant diagrams and tables from the report, plus reproduced the foreword by Dr. Judith Curry as…

Chicken al la still not a king

The royal prince in waiting of Britain labels climate skeptics as “headless chickens”. From The Telegraph: Prince Charles has criticised climate change deniers, describing them as the “headless chicken brigade”…

CO2 and CERES

Guest Post by Willis Eschenbach The Intergovernmental Panel on Climate Change, the bureaucratic agency which appropriated the role of arbiter of things climatic, has advanced a theory for the lack…

Climate Craziness of the Week: only the 'cooler' models are wrong – the rest say 4ºC of warming by 2100

From the University of New South Wales and Dr. Steven Sherwood: “Climate sceptics like to criticise climate models for getting things wrong, and we are the first to admit they…

The Fatal Lure of Assumed Linearity

Guest Post by Willis Eschenbach [note new Update at the end, and new Figs. 4-6] In climate science, linearity is the order of the day. The global climate models are…

Mechanical Models

Guest Post by Willis Eschenbach [NOTE the update at the end of the post.] I’ve continued my peregrinations following the spoor of the global climate model data cited in my…

A Sea Change for Climate Science?

By David Stockwell writing in Quadrant Online As CO2 climate models falter and even the IPCC backs off its estimates, it just may be that a radical shift in thinking…

Commonsense Climate Science and Forecasting after AR5

Guest Essay by Dr. Norman Page 1.The Demise of the IPCC and the CAGW Delusion. a) Overview. In the AR5 Summary for Policymakers the IPCC glossed over  the developing cooling trend…

One Step Forward, Two Steps Back

Guest Post by Willis Eschenbach David Rose has posted this , from the unreleased IPCC Fifth Assessment Report (AR5): ‘ECS is likely in the range 1.5C to 4.5C… The lower…

BREAKING: IPCC AR5 report to dial back climate sensitivity

Update: the IPCC edifice is crumbling, see The state of climate science: ‘fluxed up’ See also Willis’ article One Step Forward, Two Steps Back, and Lomborg: climate models are running way too hot…

Friday Funny – Katharine Hayhoe: only YOU can control the climate!

@bkparallax @IamDonCheadle the power to change climate lies in hands of every individual on the planet, not a single gov't–or technology! — Prof. Katharine Hayhoe (@KHayhoe) August 29, 2013 With…

More low climate sensitivity

This paper A lower and more constrained estimate of climate sensitivity using updated observations and detailed radiative forcing time series from Skeie et al is now in open peer review…

The IPCC has a real pack of trouble on its hands

By Paul C. “Chip” Knappenberger and Patrick J. Michaels The United Nations Intergovernmental Panel on Climate Change (IPCC) is in the midst of finishing its Fifth Assessment Report (AR5) on…