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Posted Mon Dec 7 2009: from University of Bristol, via EurekAlert:
Earth more sensitive to carbon dioxide than previously thought
In the long term, the Earth's temperature may be 30-50 percent more sensitive to atmospheric carbon dioxide than has previously been estimated, reports a new study published in Nature Geoscience this week. The results show that components of the Earth's climate system that vary over long timescales -- such as land-ice and vegetation -- have an important effect on this temperature sensitivity, but these factors are often neglected in current climate models.... Lunt said, "We found that, given the concentrations of carbon dioxide prevailing three million years ago, the model originally predicted a significantly smaller temperature increase than that indicated by the reconstructions. This led us to review what was missing from the model."
[Read more stories about: arctic meltdown, carbon emissions, climate impacts]

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'Doc Michael says:
All this time I thought I could slap the atmosphere around. Now I find out it's sensitive.

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