Tag Archives: IPCC

Toys, pram, out!

Posted on April 9, 2017 by

It seems that Roger Pielke Jr is having a bit of a rant on Twitter about an interview Michael Mann gave about the recent Congressional Hearings. He accuses Michael Mann of lying about him and also suggests that he might … Continue reading →

Posted in Climate change, ClimateBall, Michael Mann, Roger Pielke Jr | Tagged , , , , , , , , | 18 Comments

Catastrophe, hoax, or just “Lukewarm”?

Posted on February 28, 2017 by

I thought I would post this video of a talk given by Tim Palmer. The basic message is that climate change is neither a hoax, going to be catastrophic, or going to be benign (Lukewarm). What climate science can (and … Continue reading →

Posted in Climate change, Climate sensitivity, Global warming, IPCC, Research, Science | Tagged , , , , , , , , | 119 Comments

Oh no, not again

Posted on February 26, 2017 by

Somehow a paper arguing that the increase in atmospheric CO2 is mostly natural has managed to pass peer-review. Gavin Schmidt’s already covered it in a Realcimate post. Gavin Cawley’s paper is, in a sense, a pre-emptive response to this new … Continue reading →

Posted in Climate change, ClimateBall, IPCC, Pseudoscience, Research | Tagged , , , , , , , | 64 Comments

Judith Curry confuses laypeople about climate models

Posted on February 21, 2017 by

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 , , , , , | 94 Comments

Sensitivity to cumulative emissions

Posted on December 2, 2015 by

Something I’ve mentioned here quite regularly is the idea that warming depends roughly linearly on cumulative (total) emissions. This is slightly counter intuitive, in that warming depends logarithmically on atmospheric CO2 concentration. The reason is essentially that it incorporates climate … Continue reading →

Posted in Climate change, Climate sensitivity, ClimateBall, Global warming, IPCC, Judith Curry, Science | Tagged , , , , , , | 201 Comments

Clarity of meaning

Posted on October 23, 2015 by

A while ago I discussed a Nature Climate Change article by Greg Hollin and Warren Pearce called Tension between scientific certainty and meaning complicates communication of IPCC reports. A number of us submitted a response, which appeared today together with … Continue reading →

Posted in Climate change, ClimateBall, IPCC, Science | Tagged , , , , , , , | 49 Comments

“very likely” versus “extremely likely”

Posted on August 18, 2015 by

In IPCC land “very likely” means 90% – 100% probability, while extremely likely means 95% – 100% probability. In light of that, I was wondering if anyone had any insights as to why, in Chapter 10 of the IPCC’s WGI … Continue reading →

Posted in Climate change, ClimateBall, Global warming, IPCC, Science | Tagged , , , , | 21 Comments