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SUMMARY:Influence of West Antarctic Ice Sheet collapse on Antarctic surfac
 e climate and ice core records - Eric Steig\, Leverhulme Visiting Professo
 r\, University of Edinburgh. Professor\, Departments of Atmospheric Scienc
 es and Earth and Space Sciences\, University of Washington
DTSTART:20150430T111500Z
DTEND:20150430T121500Z
UID:TALK59096@talks.cam.ac.uk
CONTACT:Dr. Pranab Deb
DESCRIPTION: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 anomal
 ous cyclonic circulation with increased flow of warm\, maritime air toward
 s the South Pole\, and cold-air advection from the East Antarctic plateau 
 towards the Ross Sea and Marie Byrd Land\, West Antarctica. \nRelative to 
 the background climate\, some areas in the East Antarctic interior warm mo
 derately\, while substantial cooling (several degrees C) occurs over parts
  of West Antarctica. Anomalously low isotope-paleotemperature values at Mt
 . Moulton\, West Antarctica\, compared with ice core records in East Antar
 ctica\, are consistent with collapse of the WAIS during the last interglac
 ial period\, Marine Isotope Stage (MIS) 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.
LOCATION:British Antarctic Survey\, Room 330B
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