The Last Glacial Maximum

Author:

Clark Peter U.1,Dyke Arthur S.2,Shakun Jeremy D.1,Carlson Anders E.3,Clark Jorie1,Wohlfarth Barbara4,Mitrovica Jerry X.5,Hostetler Steven W.6,McCabe A. Marshall7

Affiliation:

1. Department of Geosciences, Oregon State University, Corvallis, OR 97331, USA.

2. Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8, Canada.

3. Department of Geology and Geophysics, University of Wisconsin, Madison, WI 53706, USA.

4. Department of Geology and Geochemistry, Stockholm University, SE-10691, Stockholm, Sweden.

5. Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, USA.

6. U.S. Geological Survey, Department of Geosciences, Oregon State University, Corvallis, OR 97331, USA.

7. School of Environmental Science, University of Ulster, Coleraine, County Londonderry, BT52 1SA, UK.

Abstract

The Melting Is in the Details Global sea level rises and falls as ice sheets and glaciers melt and grow, providing an integrated picture of the changes in ice volume but little information about how much individual ice fields are contributing to those variations. Knowing the regional structure of ice variability during glaciations and deglaciations will clarify the mechanisms of the glacial cycle. Clark et al. (p. 710 ) compiled and analyzed more than 5000 radiocarbon and cosmogenic surface exposure ages in order to develop a record of maximum regional ice extent around the time of the Last Glacial Maximum. The responses of the Northern and Southern Hemispheres differed significantly, which reveals how the evolution of specific ice sheets affected sea level and provides insight into how insolation controlled the deglaciation.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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