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Interhemispheric Ice-Sheet Synchronicity During the Last Glacial Maximum

Weber, Michael E., Clark, Peter U, Ricken, Werner, Mitrovica, Jerry X., Hostetler, Steven W. and Kuhn, Gerhard (2011) Interhemispheric Ice-Sheet Synchronicity During the Last Glacial Maximum. SCIENCE, 334 (6060). pp. 1265-1269. [Journal article]

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DOI: 10.1126/science.1209299


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.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences > School of Geography and Environmental Sciences
Faculty of Life and Health Sciences
Research Institutes and Groups:Environmental Sciences Research Institute > Quaternary Environmental Change
Environmental Sciences Research Institute
ID Code:27119
Deposited By: Mrs Linda Allen
Deposited On:29 Sep 2013 08:24
Last Modified:29 Sep 2013 08:24

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