Bit of a backlog of blogging to do, but now I'm back in Japan with hardly anyone to talk to, I've got no excuse...
First up, I noticed Judith Curry
continuing down her bizarre rabbit-hole. Luckily
mt got there first, and I don't have much to add except my broad support for what he has said. Note that in the very first premise of her argument, she only assigns 70% probability to the fact that surface temperatures actually show a warming at all! This is the warming that the IPCC famously called "unequivocal" in their 2007 report. As far as I can tell, at this point she is simply so far out of touch with mainstream climate science that her analyses aren't worth the time it takes to read them. End of story.
If you want more detail, then yes, I agree with mt that her approach to probability is pretty dodgy too. I consider myself reasonably ecumenical in my approach towards the more esoteric probabilistic ideas such as
Dempster-Schafer theory and
imprecise probability, and have no real objection to them - I mostly take the view that we should merely try to do standard Bayesian probability a bit better before deciding it is inadequate for the task at hand. However, I don't think the "Italian flag" analysis - at least JC's interpretation of it - is a useful or even coherent contribution. The rot sets in right at the
outset, where she apparently conflates the concept of
evidence for and against the proposition "most of the observed warming was very likely due to the GHG increase" with an estimate of the
proportion of warming that was due to anthropogenic vs natural factors. This seems like a rather elementary point to get confused over. Far from being the claimed synthesis of much detailed thoughts regarding the failings of the IPCC, most of what she has written reads to me like a stream-of-consciousness blog post that hasn't been properly thought through at all. But hey, "very not the IPCC" is all it takes for a stream of admirers and press attention, irrespective of whether there is any there, there.
It's not as if I'm the IPCC's greatest fan, either. But I try to base my criticisms on actual failings, rather than just bandying about terms like "corruption" and hoping that something might stick. Since I've been officially threatened with increased ostracism if I dare to say anything nasty about them in public I won't bother re-hashing any of that again. At least not right now :-)