| On the Response of the Global Subduction Rate to Global Warming in Coupled Climate Models简 |
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| 作者姓名： | LIU Chengyan WANG Zhaomin |
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| 摘 要： | 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. F~rther, 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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| 关 键 词： | 全球变暖 气候模式 俯冲 耦合 定量估计 评估报告 气候变暖 IPCC |
On the response of the global subduction rate to globalwarming in coupled climate models |
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| LIU Chengyan,WANG Zhaomin.On the response of the global subduction rate to globalwarming in coupled climate models[J].Advances in Atmospheric Sciences,2014,31(1):211-218. |
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| Authors: | Chengyan Liu Zhaomin Wang |
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| Institution: | 1. School of Marine Sciences, Nanjing University of Information Science & Technology, Nanjing, 210044, China
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| Abstract: | 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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| Keywords: | subduction rate mixed layer depth global warming |
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