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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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 Abstract
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.
 Keywords
atmospheric ;glacial period;southern ocean;westerly wind;numerical model;
 Language
English
 Cited by
1.
제2차 고기후 모형 비교프로그램에서 시뮬레이션된 마지막 최대빙하기의 남극 기온변화,김성중;우은진;김백민;

지질학회지, 2011. vol.47. 5, pp.443-457
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Toward understanding the dust deposition in Antarctica during the Last Glacial Maximum: Sensitivity studies on plausible causes, Journal of Geophysical Research, 2010, 115, D24  crossref(new windwow)
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