Local Orbital Forcing of Antarctic Climate Change During the Last Interglacial

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Science  01 May 1998:
Vol. 280, Issue 5364, pp. 728-730
DOI: 10.1126/science.280.5364.728

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During the last interglacial, Antarctic climate changed before that of the Northern Hemisphere. Large local changes in precession forcing could have produced this pattern if there were a rectified response in sea ice cover. Results from a coupled sea ice–ocean general circulation model supported this hypothesis when it was tested for three intervals around the last interglacial. Such a mechanism may play an important role in contributing to phase offsets between Northern and Southern Hemisphere climate change for other time intervals.

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