Michael Mann Michael Mann:
(SciAm:)The United Nations Intergovernmental Panel on Climate Change (IPCC) featured the hockey stick prominently in its 2001 report. Was that wise?
(MM:) In retrospect, it probably wasn’t the most prudent decision, because it played right into the argument that contrarians like to use: that somehow the science depends on one particular study or even one particular author of one particular study. And if you can somehow discredit that one study or that one person, the entire scientific case collapses.
There had, in fact, been several reconstructions that told a similar story in the technical report. By the time the IPCC report came out, there were three [additional] reconstructions that came to more or less the same conclusion.
http://www.scientificamerican.com/artic ... the-hockeyMichael Mann. Yes, I played that card.