2010-04-28
Geologists Find Troubling Signs in Antarctica. By Clay Farris Naff, Scientific American, April 19, 2010. "Emerging evidence from an Antarctic geological research drilling program known as Andrill suggests that the southernmost continent has had a much more dynamic history than previously suspected -- one that could signal an abrupt shrinkage of its ice sheets at some unknown greenhouse gas threshold, possibly starting in this century. Especially troubling, scientists see evidence in the geological data that could mean the vast East Antarctic Ice Sheet, which holds at least four-fifths of the continent's ice, is less resistant to melting than previously thought."
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