Interhemispheric ice-sheet synchronicity during the last glacial maximum
Science
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Abstract
The timing of the last maximum extent of the Antarctic ice sheets relative to those in the Northern Hemisphere remains poorly understood. We develop a chronology for the Weddell Sea sector of the East Antarctic Ice Sheet that, combined with ages from other Antarctic ice-sheet sectors, indicates that the advance to and retreat from their maximum extent was within dating uncertainties synchronous with most sectors of Northern Hemisphere ice sheets. Surface climate forcing of Antarctic mass balance would probably cause an opposite response, whereby a warming climate would increase accumulation but not surface melting. Our new data support teleconnections involving sea-level forcing from Northern Hemisphere ice sheets and changes in North Atlantic deep-water formation and attendant heat flux to Antarctic grounding lines to synchronize the hemispheric ice sheets.
Suggested Citation
Weber, M.E., Clark, P., Ricken, W., Mitrovica, J.X., Hostetler, S.W., and Kuhn, G., 2011, Interhemispheric ice-sheet synchronicity during the last glacial maximum: Science, v. 334, no. 6060, p. 1265-1269, https://doi.org/10.1126/science.1209299.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Interhemispheric ice-sheet synchronicity during the last glacial maximum |
| Series title | Science |
| DOI | 10.1126/science.1209299 |
| Volume | 334 |
| Issue | 6060 |
| Year Published | 2011 |
| Language | English |
| Publisher | American Association for the Advancement of Science |
| Publisher location | Washington, D.C. |
| Contributing office(s) | Branch of Regional Research-Western Region |
| Description | 5 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Science |
| First page | 1265 |
| Last page | 1269 |