Monday, November 19, 2007

The trees were kidding: world was warmer just a few centuries ago

The IPCC used it in its third assessment report. Al Gore used it in his movie. In fact, no graphic has had such a huge effect as the infamous hockeystick produced by Michael Mann, who used tree ring data to allegedly show that the last century’s warming was unprecedented, and the globe had never in 2000 years been this hot:

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