Tim Barnett on the Hockey Stick
Dec 2, 2011
Bishop Hill in Climate: MWP, Climate: Mann

Email 2383 contains further evidence that everyone in the world of paleoclimate knew the Hockey Stick was a duffer.

From: Tim Barnett [[2]mailto:XXXXXXXXXXX@ucsd.edu]

Sent: 11 October 2004 16:42

To: Gabi Hegerl; Klaus Hasselmann

Cc: Prof.Dr. Hans von Storch; Myles Allen; francis; Reiner Schnur; Phil Jones; Tom Crowley; Nathan Gillett; David Karoly; Jesse Kenyon; christopher.d.miller@noaa.gov; Pennell, William T; Tett, Simon; Ben Santer; Karl Taylor; Stott, Peter; Bamzai, Anjuli

Subject: Re: spring meeting

not to be a trouble maker but......if we are going to really get into the paleo stuff, maybe someone(s) ought to have another look at Mann's paper. His statistics were suspect as i remember. for instance, i seem to remember he used, say, 4 EOFs as predictors. But he prescreened them and threw one away because it was not useful. then made a model with the remaining three, ignoring the fact he had originally considered 4 predictors. He never added an artifical skill measure to account for this but based significance on 3 predictors. Might not make any difference. My memory is probably faulty on these issues, but to be completely even handed we ought to be sure we agree with his procedures. best, tim

It's interesting how much evidence there is now that the Hockey Stick was known to be a problem. Perhaps readers can help collate a list of emails making this point.

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