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Westerly Winds in the Southern Ocean During the Last Glacial Maximum Simulated in CCM3
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  • Journal title : Ocean and Polar Research
  • Volume 31, Issue 4,  2009, pp.297-304
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2009.31.4.297
 Title & Authors
Westerly Winds in the Southern Ocean During the Last Glacial Maximum Simulated in CCM3
Kim, Seong-Joong; Lee, Bang-Yong;
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We investigated the response of the westerly winds over the Southern Ocean (SO) to glacial boundary conditions for the Last Glacial Maximum using the CCM3 atmospheric general circulation model. In response to glacial boundary conditions, the zonally averaged maximum SO westerly winds weakened 20-35% and were displaced toward the equator by 3-4 degrees. This weakening of the SO westerly winds arose from a substantial increase in mean sea level pressure (MSLP) in the southern part of the SO around Antarctica relative to the northern part. The increase in MSLP around Antarctica is associated with a marked temperature reduction caused by an increase in sea ice cover and ice albedo feedback during the glacial time. The weakened westerly winds in the SO and their equator-ward displacement might play a role in reducing the atmospheric concentration by reducing upwelling of the carbon rich deep water during the glacial time.
atmospheric ;glacial period;southern ocean;westerly wind;numerical model;
 Cited by
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