PALEOCLIMATE: Blowing Hot and Cold

Posted by Dale on Mar 22, 2002 at 08:46

Tree-ring records play an important role in reconstructing climate change patterns over the last millenium. In their Perspective, Briffa and Osborn highlight the report by Esper et al. of a largely independent record of widespread tree-growth variations across the extra-tropical Northern Hemisphere. Estimates of past temperature changes based on the record suggest that climate swings in the last 1000 years were greater than has yet been generally accepted.

Turns out that global warming was occuring before we got around to making it happen. In fact, it was even more violent before man started trying to do it intentionally. Good thing we are now in charge and can make global warming happen slowly rather than as rapidly as it used to occur without our help.

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