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Tropical temperatures during the LGM is important. The matter is of more than academic interest because the role of tropical SSTs is very important in understanding how global climates may change in the future. If large decreases in tropical SSTs did occur during glacial times, it implies that climate sensitivity to changes in greenhouse gases (and associated feedbacks) is at the high end of most estimates (~4.5 centigrade for doubling of CO2), otherwise the LGM forcing would not have produced such large changes. |
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