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Tropical climate at the last glacial maximum inferred from glacier mass-balance modeling

Science

By:
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DOI: 10.1126/science.290.5497.1747

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Abstract

Model-derived equilibrium line altitudes (ELAs) of former tropical glaciers support arguments, based on other paleoclimate data, for both the magnitude and spatial pattern of terrestrial cooling in the tropics at the last glacial maximum (LGM). Relative to the present, LGM ELAs were maintained by air temperatures that were 3.5??to 6.6 ??C lower and precipitation that ranged from 63% wetter in Hawaii to 25% drier on Mt. Kenya, Africa. Our results imply the need for a ~3 ??C cooling of LGM sea surface temperatures in the western Pacific warm pool. Sensitivity tests suggest that LGM ELAs could have persisted until 16,000 years before the present in the Peruvian Andes and on Papua, New Guinea.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Tropical climate at the last glacial maximum inferred from glacier mass-balance modeling
Series title:
Science
DOI:
10.1126/science.290.5497.1747
Volume
290
Issue:
5497
Year Published:
2000
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
1747
Last page:
1750
Number of Pages:
4