Diapycnal Mixing in Transient Responses of the Atlantic Meridional Overturning Circulation in an Enhanced Freshwater Perturbation Experiment

作     者：Helge DRANGE Odd Helge OTTER 

作者机构：Nansen-Zhu International Research CentreInstitute of Atmospheric PhysicsChinese Academy of Sciences Nansen Environmental and Remote Sensing Center/Bjerknes Centre for Climate Research 

出 版 物：《Atmospheric and Oceanic Science Letters》 (大气和海洋科学快报（英文版）)

年 卷 期：2010年第3卷第4期

页      面：201-206页

学科分类：0710[理学-生物学] 0908[农学-水产] 07[理学] 0707[理学-海洋科学] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0825[工学-航空宇航科学与技术] 

基　　金：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) 

主　　题：diapycnal mixing western tropical North Atlantic freshwater experiment 

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 ***-dependent oceanic diapycnal mixing has been hypothesized as a reason for the simulated recovery of the *** study investigated the role of diapycnal mixing in transient responses of simulated *** 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 ***,simulated AMOCs were more sensitive to active stratification-dependent diapycnal mixing than fixed ***,stratification-dependent diapycnal mixing cannot be conclusively singled out as the critical cause of the recoveries of simulated AMOCs under enhanced-freshwater inputs.