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Posted Tue Feb 5 2008: from PNAS, via Yahoo News:
Tipping points on many horizons
"Tipping elements in the tropics, the boreal zone, and west Antarctica are surrounded by large uncertainty," they wrote, pointing to more potential abrupt shifts than seen in a 2007 report by the U.N. Climate Panel. A projected drying of the Amazon basin, linked both to logging and to global warming, could set off a dieback of the rainforest. "Many of these tipping points could be closer than we thought," lead author Timothy Lenton, of the University of East Anglia in England, told Reuters of the study.
[Read more stories about: tipping point, death spiral]

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Tipping ever faster.

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