And This is Global Warming?

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Following up on James Wilson's earlier post, I, too have experienced the "... and this is global warming?" remark from friends and strangers alike. When I call people on this statement - and these are educated people, mind you - they cite their "evidence." Most recently, it's that Chicago's 2008-09 winter was the 24th-coldest on record since 1872.

Of course, I explain that natural variation predicts that cold winters will happen in the midst of an overall warming trend.

Andrew Revkin of the New York Times has a nice blog piece on the topic of cold spells in the midst of a warming planet. A couple of very simple graphs make the point. They're the kind you can easily sketch out on a cocktail napkin when the need arises...

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