Last month Judith Curry challenged folks to respond to Bishop Hill/Montford’s book The Hockey Stick Illusion: Climategate and the Corruption of Science
So I am laying down the gauntlet, this really needs to discussed and rebutted by the paleo researchers and the IPCC defenders.
In the context of the hockey stick wars, Montford clearly describes the three main critiques that MM had of MBH98,99: i) inappropriate use of centering in the principal component analysis; ii) stripbark bristlecones are not reliable as a proxy; iii) the R2 statistic needs to be used in the assessment of significance
I said that I would look at it, and I will when my copy arrives but in the meantime Tamino has written a detailed review of the book with particular emphasis on two of the three main critiques that Curry identified. The response from Curry was perplexing. Instead of thanking Tamino for addressing the main critiques that she had identified, Curry wrote that the cons for Tamino’s review were:
numerous factual errors and misrepresentations, failure to address many of the main points of the book
Pressed to identify these errors, Curry instead moved the goalposts, coming up with nine different “key points” of the book. When Gavin Schmidt demolished these, rather than concede that some, at least, were wrong, Curry asserted that Schmidt’s rebuttal was full of logical fallacies (though once again without identifying any of them at all). And that therefore, “Montford’s theses look even more convincing”. Oh and:
Once you’re in a hole, you can try to climb out or keep digging. Well keep digging, Gavin.
(Relevant comments have been collected by Stephen here, if you don’t want to read the whole comment thread at RealClimate.)
The list of reliable sources in climatology just got a bit shorter.
William Connolley suggests:
Curry needs to back off and find time to write down a coherent position that she actually believes in.
Mind you, over at Bishop Hill’s blog folks seem to think that she did just fine. For example
Clearly Judith Curry, Jean S, Thinking Scientist and Atomic Hairdryer did superb work in running both Tamino and his faithful side kick, Gavin, in circles on their own territory. That is the amazing part. The four of them, plus a couple others, invaded AGW GruppenfÃ¼hrer’s private fiefdom, blew through their attempt to be in control and ran amok with reason, logic and fact.