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Science 8 July 1994:
Vol. 265. no. 5169, pp. 195 - 201
DOI: 10.1126/science.265.5169.195
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Articles

Ice Age Paleotopography

W. Richard Peltier 1

1 Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S 1A7

A gravitationally self-consistent theory of postglacial relative sea level change is used to infer the variation of surface ice and water cover since the Last Glacial Maximum (LGM). The results show that LGM ice volume was approximately 35 percent lower than suggested by the CLIMAP reconstruction and the maximum heights of the main Laurentian and Fennoscandian ice complexes are inferred to have been commensurately lower with respect to sea level. Use of these Ice Age boundary conditions in atmospheric general circulation models will yield climates that differ significantly from those previously inferred on the basis of the CLIMAP data set.


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