The role of Luzon Strait transport in shallow meridional overturning circulation of South China Sea  

作　　者：Kun Jiang Yu Wang Yan Sun Jian Lan 

机构地区：[1]Frontiers Science Center for Deep Ocean Multispheres and Earth System and Physical Oceanography Laboratory,Ocean University of China,Qingdao 266100,China [2]College of Oceanic and Atmospheric Sciences,Ocean University of China,Qingdao 266100,China [3]National Marine Environmental Monitoring Center,Dalian 116023,China [4]Laoshan Laboratory,Qingdao 266237,China

出　　处：《Acta Oceanologica Sinica》2025年第1期28-35,共8页海洋学报(英文版)

基　　金：The National Natural Science Foundation of China under contract No.42076003.

摘　　要：The impacts of the Luzon Strait transport on shallow meridional overturning circulation(SMOC)in the South China Sea(SCS)have been pointed out by previous studies,but the issue whether the Luzon Strait transport dominates the SMOC formation still remains open.The Helmholtz decomposition is applied based on the ocean general circulation model for the earth simulator products to address this issue.Results show that the motion caused by the Luzon Strait transport is characterized as an obvious southward flow between 13°N and 20°N.After this motion being removed,the clockwise winter SMOC and the anticlockwise summer SMOC can still exist significantly.The SMOC existence and its seasonal variation are also reproduced in the numerical simulation with the Luzon Strait closed.Both results of the Helmholtz decomposition and numerical experiment suggest that the SMOC formation and its seasonal variation are not dominated by the Luzon Strait transport.The SCS monsoon is the primary driving factor for the SMOC,which is related to the physical processes within the SCS.

关 键 词：South China Sea Luzon Strait transport shallow meridional overturning circulation Helmholtz decomposition 

分 类 号：P731.2[天文地球—海洋科学]