温室气体浓度增加情景下大西洋温盐环流的演变

牟林; 吴德星; 周刚; 陈学恩; 马超

Volume 32 Issue 1

Jan. 2007

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MOU Lin, WU De-xing, ZHOU Gang, CHEN Xue-en, MA Chao, 2007. Changes in Atlantic Thermohaline Circulation under Different Atmospheric CO2 Scenarios. Earth Science, 32(1): 141-146.

Citation:

MOU Lin, WU De-xing, ZHOU Gang, CHEN Xue-en, MA Chao, 2007. Changes in Atlantic Thermohaline Circulation under Different Atmospheric CO₂ Scenarios. Earth Science, 32(1): 141-146.

MOU Lin, WU De-xing, ZHOU Gang, CHEN Xue-en, MA Chao, 2007. Changes in Atlantic Thermohaline Circulation under Different Atmospheric CO2 Scenarios. Earth Science, 32(1): 141-146.

Citation:

MOU Lin, WU De-xing, ZHOU Gang, CHEN Xue-en, MA Chao, 2007. Changes in Atlantic Thermohaline Circulation under Different Atmospheric CO₂ Scenarios. Earth Science, 32(1): 141-146.

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Changes in Atlantic Thermohaline Circulation under Different Atmospheric CO₂ Scenarios

1.
Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, China
2.
Max-Planck Institute for Meteorology, Hamburg 20146, Germany
3.
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

Received Date: 2006-06-20
Publish Date: 2007-01-25

Abstract

Abstract

Changes in the thermohaline circulation (THC) arising from the increase in the CO₂ concentration in the atmosphere will dominate the future climate regimes. In this paper, a new climate model developed at Max-Planck Institute for Meteorology is targeted at the variation of THC strength, the changes in North Atlantic deep water (NADW) formation and the regional responses of the THC in the North Atlantic to the increasing atmospheric CO₂. From 2000 to 2100, the increase in CO₂ (B1, A1B and A2) will have decreased the strength of THC by 4 Sv, 5.1 Sv and 5.2 Sv, respectively, or equivalently, reduced by 20%, 25% and 25.1% of the present THC strength. This research indicates that oceanic deep convective activity is significantly strengthened in the Greenland-Iceland-Norway (GIN) Seas owing to saltier (denser) upper oceans, but is weakened both in the Labrador Sea and in the south of the Denmark Strait region (SDSR) because of surface warming and freshening derived from global warming. The saltiness of the GIN Seas is mainly initiated by the increase in the saline North Atlantic inflow through Faro-Bank (FB) Channel. Under the scenario A1B, the deep water formation rate in the North Atlantic decreases from 16.2 Sv to 12.9 Sv with a corresponding increase in CO₂.
- thermohaline circulation (THC),
- greenhouse gases,
- deepwater

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References(13)

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