Tag Archives: GCMs

Climate sensitivity in CMIP6 GCMs

Posted on January 5, 2020 by ...and Then There's Physics

Anyone who is aware of what’s going on in climate science should have heard that the latest generation of climate models, known as CMIP6, seem to be suggesting a somewhat higher climate sensitivity than suggested by the previous CMIP5 models. … Continue reading →

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Posted in Climate sensitivity, Gavin Schmidt, Research, Scientists, The scientific method | Tagged , , , , , , , | 63 Comments

Models are failed hypotheses!

Posted on May 25, 2019 by ...and Then There's Physics

John Christy has written a report for the Global Warming Policy Foundation called climate models have been predicting too much warming. The basic conclusion of the report is that climate models predict far more warming in the tropical troposphere than … Continue reading →

Posted in Climate change, Climate sensitivity, ClimateBall, Global warming, Greenhouse effect | Tagged , , , , , , , , | 61 Comments

Judith Curry confuses laypeople about climate models

Posted on February 21, 2017 by ...and Then There's Physics

Judith Curry has written a report for the Global Warming Policy Foundation called Climate Models for the layman. As you can imagine, the key conclusions is that climate models are not fit for the purpose of justifying political policies to … Continue reading →

Posted in Climate sensitivity, ClimateBall, Judith Curry, Science, The scientific method | Tagged , , , , , | 110 Comments

Engineering the software for understanding climate change

Posted on September 15, 2016 by ...and Then There's Physics

Since Judith Curry has a guest post about global climate models and the laws of physics, I thought it would be worth posting this recently released video of a talk about climate modelling (see below). It’s by Steve Easterbrook, who … Continue reading →

Posted in ClimateBall, Global warming, Judith Curry, Research, Science | Tagged , , , , , , | 49 Comments

Model tuning

Posted on August 1, 2016 by ...and Then There's Physics

Came across a very interesting paper on the art and science of climate model tuning. Based on the comments here, it appears that some are interpreting this as confirming their claims that climate models are tuned to give preferred results. … Continue reading →

Posted in Climate change, Climate sensitivity, Global warming, Judith Curry, Science | Tagged , , , , , | 265 Comments

Guest post: Some thoughts on Climate Modeling

Posted on September 9, 2015 by ...and Then There's Physics

This is guest post by Michael Tobis, partly motivated by some discussions we’ve had about modelling. In particular, the difference between modelling in the physical sciences, and modelling in other research areas. My personal – and not entirely ill-informed – … Continue reading →

Posted in Climate change, ClimateBall, Global warming, IPCC, Science | Tagged , , , , , , | 176 Comments

Models don’t over-estimate warming?

Posted on January 31, 2015 by ...and Then There's Physics

I thought I might write about the new paper by Jochem Marotzke and Piers Forster called Forcing, feedback and internal variability in global temperature trends. It’s already been discussed in a Carbon Brief post called claims that climate models overestimate … Continue reading →

Posted in Climate change, Climate sensitivity, Global warming, Science | Tagged , , , , , , , , , | 729 Comments

Nonlinear feedbacks

Posted on November 14, 2014 by ...and Then There's Physics

I’ve written a number of posts about the energy balance models (EBMs) used by Nic Lewis and thought I might write one more (sorry SB 🙂 ). In a previous post, Victor asked what I thought the reasons were for … Continue reading →

Posted in advocacy, Climate change, Climate sensitivity, Science | Tagged , , , , , , , , | 70 Comments

What else can you do with a GCM?

Posted on November 13, 2014 by ...and Then There's Physics

Since I’m tired/bored of the climate “debate” I thought I might write a quick post about something that’s related to climate change, but probably not particularly controversial. I came across a paper recently by Shields et al. (2014) called Spectrum-driven … Continue reading →

Posted in Climate change, Science | Tagged , , , , , | 17 Comments

The length of the “pause”?

Posted on September 2, 2014 by ...and Then There's Physics

In a recent post, Judith Curry highlighted a new paper by Shaun Lovejoy called Return periods of global climate fluctuations and the pause. This is a follow-up of an earlier paper that concluded that the probability of a centennial scale … Continue reading →

Posted in Uncategorized | Tagged , , , , , , | 20 Comments