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A coupled model simulation of ocean thermohaline properties of the Last Glacial Maximum

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Title
A coupled model simulation of ocean thermohaline properties of the Last Glacial Maximum
Other Titles
대기해양접합모델을 이용한 지난최대빙하기의 해양 재현 추치실험
Authors
Kim, Seong-Joong
Keywords
lgm; model; salinity; simulation; temperature
Issue Date
2004
Citation
Kim, Seong-Joong. 2004. A coupled model simulation of ocean thermohaline properties of the Last Glacial Maximum. The Korean Society of Oceanograpy. 2004.11.04.
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/201206/7528
Conference Name
The Korean Society of Oceanograpy
Conference Date
2004.11.04
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