Journal
GEOPHYSICAL RESEARCH LETTERS
Volume 42, Issue 12, Pages 4862-4868Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1002/2015GL063861
Keywords
Antarctica; atmospheric circulation; ice core; glaciology; sea level
Categories
Funding
- National Science Foundation [1043092, 0230316, 0846641, 0936059, 1359464, 1341497]
- University of Washington
- Department of Energy
- Leverhulme Trust
- University of Edinburgh
- Directorate For Geosciences
- Div Atmospheric & Geospace Sciences [0936059] Funding Source: National Science Foundation
- Directorate For Geosciences
- Office of Polar Programs (OPP) [1043167] Funding Source: National Science Foundation
- Div Atmospheric & Geospace Sciences
- Directorate For Geosciences [1359464] Funding Source: National Science Foundation
- Office of Polar Programs (OPP)
- Directorate For Geosciences [1341497, 1443328, 1043092] Funding Source: National Science Foundation
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Climate model simulations are used to examine the impact of a collapse of the West Antarctic Ice Sheet (WAIS) on the surface climate of Antarctica. The lowered topography following WAIS collapse produces anomalous cyclonic circulation with increased flow of warm, maritime air toward the South Pole and cold-air advection from the East Antarctic plateau toward the Ross Sea and Marie Byrd Land, West Antarctica. Relative to the background climate, areas in East Antarctica that are adjacent to the WAIS warm, while substantial cooling (several degrees C) occurs over parts of West Antarctica. Anomalously low isotope-paleotemperature values at Mount Moulton, West Antarctica, compared with ice core records in East Antarctica, are consistent with collapse of the WAIS during the last interglacial period, Marine Isotope Stage 5e. More definitive evidence might be recoverable from an ice core record at Hercules Dome, East Antarctica, which would experience significant warming and positive oxygen isotope anomalies if the WAIS collapsed.
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