Michael Mann: Global Cryass

As usual Old Fraud you only use those reports that you find favourable...kind of like that Russian Scientist I pointed out.

Here is what the NAS actually had to say about your bum buddies graph.


This is, to put it mildly, disingenuous. While it is certainly true that the media reported it in this sheep-like way -- thanks in part to the manner in which the NAS chose circumspectly to spin its own conclusions -- it is nevertheless the case that in every important particular the NAS actually agreed with the McIntyre/McKitrick criticisms. Far from vindicating the ‘hockey stick’ graph, the NAS said that although it found some of Mann’s work ‘plausible’, there were so many scientific uncertainties attached to it that it did not have great confidence in it. Thus it said that

Mann et al. used a type of principal component analysis that tends to bias the shape of the reconstructions

and that they had downplayed the

uncertainties of the published reconstructions...Even less confidence can be placed in the original conclusions by Mann et al. (1999) that ‘the 1990s are likely the warmest decade, and 1998 the warmest year, in at least a millennium.’

What Mann also does not say in his diatribe is that a subsequent House Energy and Commerce Committee report chaired by Edward Wegman totally destroyed the credibility of the ‘hockey stick’ study and devastatingly ripped apart Mann’s methodology as ‘bad mathematics’. Furthermore, when Gerald North, the chairman of the NAS panel -- which Mann claims ‘vindicated him’ – and panel member Peter Bloomfield were asked at the House Committee hearings whether or not they agreed with Wegman’s harsh criticisms, they said they did:

CHAIRMAN BARTON. Dr. North, do you dispute the conclusions or the methodology of Dr. Wegman’s report?

DR. NORTH. No, we don’t. We don’t disagree with their criticism. In fact, pretty much the same thing is said in our report.

DR. BLOOMFIELD. Our committee reviewed the methodology used by Dr. Mann and his co-workers and we felt that some of the choices they made were inappropriate. We had much the same misgivings about his work that was documented at much greater length by Dr. Wegman.

WALLACE: ‘the two reports were complementary, and to the extent that they overlapped, the conclusions were quite consistent.’ (Am Stat Assoc.)

As Mark Twain might have put it, there are three kinds of lies -- lies, damned lies and global warming science.