Influence of West Antarctic Ice Sheet collapse on Antarctic surface climate

Eric J. Steig*, Kathleen Huybers, Hansi A. Singh, Nathan J. Steiger, Qinghua Ding, Dargan M.W. Frierson, Trevor Popp, James W.C. White

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

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 -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.

Original languageAmerican English
Pages (from-to)4862-4868
Number of pages7
JournalGeophysical Research Letters
Volume42
Issue number12
DOIs
StatePublished - 28 Jun 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015. American Geophysical Union. All Rights Reserved.

Keywords

  • Antarctica
  • atmospheric circulation
  • glaciology
  • ice core
  • sea level

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