| 一个淡水扰动试验中垂直混合对于北大西洋经圈环流的影响 |
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| 引用本文： | YU Lei,GAO Yong-Qi,Helge DRANGE,Odd Helge OTTER&#;. 一个淡水扰动试验中垂直混合对于北大西洋经圈环流的影响[J]. 大气和海洋科学快报, 2010, 3(4): 201-206 |
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| 作者姓名： | YU Lei,GAO Yong-Qi,Helge DRANGE,Odd Helge OTTER&# |
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| 作者单位： | 1. Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China,1. Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;2. Nansen Environmental and Remote Sensing Center/Bjerknes Centre for Climate Research, Bergen 5006, Norway,1. Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;2. Nansen Environmental and Remote Sensing Center/Bjerknes Centre for Climate Research, Bergen 5006, Norway,1. Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;2. Nansen Environmental and Remote Sensing Center/Bjerknes Centre for Climate Research, Bergen 5006, Norway |
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| 基金项目： | supported by the National Natural Science Foundation of China (Grant Nos. 40805031 and 40875047) ;the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant Nos. KZCX2-YW-218 and KZCX2- YW-BR-14) |
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| 摘 要： | It has been reported recently that the simulated Atlantic meridional overturning circulation(AMOC) using the coupled Bergen climate model(BCM) showed initial intensity declines followed by gradual recoveries over a 150-year enhanced freshwater input experiment.Stratification-dependent oceanic diapycnal mixing has been hypothesized as a reason for the simulated recovery of the AMOC.This study investigated the role of diapycnal mixing in transient responses of simulated AMOCs.Our results showed that stratification-dependent diapycnal mixing can cause stronger upwelling of deep water in the tropical Atlantic than that produced under conditions of fixed diapycnal mixing.Moreover,simulated AMOCs were more sensitive to active stratification-dependent diapycnal mixing than fixed mixing.However,stratification-dependent diapycnal mixing cannot be conclusively singled out as the critical cause of the recoveries of simulated AMOCs under enhanced-freshwater inputs.
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| 关 键 词： | diapycnal mixing western tropical North Atlantic freshwater experiment |
Diapycnal Mixing in Transient Responses of the Atlantic Meridional Overturning Circulation in an Enhanced Freshwater Perturbation Experiment |
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| YU Lei,GAO Yong-Qi,Helge DRANGE and Odd Helge OTTER&#;. Diapycnal Mixing in Transient Responses of the Atlantic Meridional Overturning Circulation in an Enhanced Freshwater Perturbation Experiment[J]. Atmospheric and Oceanic Science Letters, 2010, 3(4): 201-206 |
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| Authors: | YU Lei,GAO Yong-Qi,Helge DRANGE Odd Helge OTTER&# |
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| Affiliation: | YU Lei1,GAO Yong-Qi1,2,Helge DRANGE1,2,and Odd Helge OTTER1,2 1 Nansen-Zhu International Research Centre,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China 2 Nansen Environmental and Remote Sensing Center/Bjerknes Centre for Climate Research,Bergen 5006,Norway |
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| Abstract: | It has been reported recently that the simulated Atlantic meridional overturning circulation (AMOC) using the coupled Bergen climate model (BCM) showed initial intensity declines followed by gradual recoveries over a 150-year enhanced freshwater input experiment. Stratification-dependent oceanic diapycnal mixing has been hypothesized as a reason for the simulated recovery of the AMOC. This study investigated the role of diapycnal mixing in transient responses of simulated AMOCs. Our results showed that stratification-dependent diapycnal mixing can cause stronger upwelling of deep water in the tropical Atlantic than that produced under conditions of fixed diapycnal mixing. Moreover, simulated AMOCs were more sensitive to active stratification-dependent diapycnal mixing than fixed mixing. However, stratification-dependent diapycnal mixing cannot be conclusively singled out as the critical cause of the recoveries of simulated AMOCs under enhanced-freshwater inputs. |
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| Keywords: | diapycnal mixing western tropical North Atlantic freshwater experiment |
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