A New Ice Age?

In Greenland, a caribou skeleton lies before the snout of a glacier. Can humans prevent the ice sheets from advancing? (Credit: Andrew C. Revkin/ The New York Times)

More On Whether A Big Chill Is Nigh
-- New York Times/Earth Dot

[UPDATE, 12:30 p.m.: Thomas Crowley responds to critiques below.] I was on the road yesterday and had no time to collate earth scientists’ reactions to the Nature paper positing that the world, after 450,000 years of climatic turmoil (the ice ages and warm spells) is poised to enter a quasi-permanent big chill (unless we avert it, after dealing with near-term warming, with a subsequent buildup of greenhouse gases).

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