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Simulation of ocean temperature and salinity of the Last Glacial Maximum using a coupled model

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Title
Simulation of ocean temperature and salinity of the Last Glacial Maximum using a coupled model
Other Titles
해양-대기 접합모델을 이용하여 지난최대빙하기의 해양 염분 및 수온 시뮬레이션
Authors
Kim, Seong-Joong
Keywords
cgcm2; ocean; salinity; simulation; temperature
Issue Date
2005
Citation
Kim, Seong-Joong. 2005. Simulation of ocean temperature and salinity of the Last Glacial Maximum using a coupled model. 충남대학교. 충남대학교. 2005.07.08~.
Abstract
The imposition of glacial boundary conditions leads to heat loss to the atmosphere from the deep ocean through enhanced vertical mixing and active turbulent heat fluxes. At a near-equilibrium LGM state, the deepwater temperature becomes close to the freezing point, a result supported by several recent proxy estimates. The LGM boundary conditions also result in a marked modification in the sea surface salinity. Sea surface salinity is decreased in the northern hemisphere, largely due to freshening of the northern North Atlantic, and is increased over the Southern Ocean in part due to an increase in sea ice formation and a drier climate in the southern high latitudes. In conclusion, deep ocean conditions simulated by the coupled model are in reasonable qualitative agreement with observational proxy evidence. The coupled model results largely illustrate mechanisms responsible for the LGM deep ocean change. In particular, the redistribution of surface freshwater budget leads to a weaker and shallower North Atlantic overturning circulation and rather different deep ocean thermohaline properties during the LGM.
URI
http://repository.kopri.re.kr/handle/201206/7573
Conference Name
충남대학교
Conference Place
충남대학교
Conference Date
2005.07.08~
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