期刊
ADVANCES IN ATMOSPHERIC SCIENCES
卷 31, 期 1, 页码 211-218出版社
SCIENCE PRESS
DOI: 10.1007/s00376-013-2323-9
关键词
subduction rate; mixed layer depth; global warming
资金
- Chinese National Key Basic Research Program [2010CB950301]
- National Natural Science Foundation of China (NSFC) [41276200]
- Special Program for China Meteorology Trade [GYHY201306020]
- Scientific Research Foundation for the Introduction of Talent of Nanjing University of Information Science and Technology [S8112066001]
- General University Science Research Project of Jiangsu Province [13KJB170019]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
The response of the global subduction rate to global warming was assessed based on a set of Intergovernmental Panel on Climate Change (IPCC) Fourth Assessment Report (AR4) models. It was found that the subduction rate of the global ocean could be significantly reduced under a warming climate, as compared to a simulation of the present-day climate. The reduction in the subduction volume was quantitatively estimated at about 40 Sv and was found to be primarily induced by the decreasing of the lateral induction term due to a shallower winter mixed layer depth. The shrinking of the winter mixed layer would result from intensified stratification caused by increased heat input into the ocean under a warming climate. A reduction in subduction associated with the vertical pumping term was estimated at about 5 Sv. Further, in the Southern Ocean, a significant reduction in subduction was estimated at around 24 Sv, indicating a substantial contribution to the weakening of global subduction.
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