Numerical investigation of the South China Sea deep circulation

作     者：Shengquan Tang Xueen Chen Zhi Zeng Xin Liu Shengquan Tang;Xueen Chen;Zhi Zeng;Xin Liu

作者机构：College of Oceanic and Atmospheric SciencesOcean University of ChinaQingdao266100China Shandong Computer Science Center(National Supercomputer Center in Jinan)Qilu University of Technology(Shandong Academy of Sciences)Jinan250014China College of Meteorology and OceanographyNational University of Defense TechnologyChangsha410073China 

出 版 物：《Acta Oceanologica Sinica》 (海洋学报（英文版）)

年 卷 期：2022年第41卷第5期

页      面：1-11页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 

基　　金：The National Key Research and Development Program of China under contract No.2021YFF0704002 the Aoshan Science and Technology Innovation Program of Pilot National Laboratory for Marine Science and Technology(Qingdao)under contract No.2018ASKJ01-04 

主　　题：South China Sea deep sea circulation deep overflow surface wind potential vorticity 

摘      要：Based on a two-level nested model from the global ocean to the western Pacific and then to the South China Sea(SCS),the high-resolution SCS deep circulation is numerically *** SCS deep circulation shows a basin-scale cyclonic structure with a strong southward western boundary current in summer(July),a northeast-southwest through-flow pattern across the deep basin without a western boundary current in winter(January),and a transitional pattern in spring and *** sensitivity model experiments illustrate that the Luzon Strait deep overflow is the main factor controlling the seasonal variation in the SCS deep *** SCS surface wind can significantly influence the SCS deep circulation in *** Luzon Strait deep overflow transport from the Pacific into the SCS ranges from 0.68×10^(6) m^(3)/s to 1.83×10^(6) m^(3)/s,reaching its maximum in summer(July,up to 1.83×10^(6) m^(3)/s),less in autumn and winter,and the minimum in spring(May,0.68×10^(6) m^(3)/s).In summer,the strong Luzon Strait deep overflow dominates the SCS deep circulation when the role of the SCS surface wind is *** winter,the weaker Luzon Strait deep overflow and SCS surface wind jointly drive the SCS deep circulation into a northeast-southwest through-flow *** potential vorticity(PV)dissipation in the SCS deep basin reaches its maximum(−0.122 m^(2)/s^(2))in May and its minimum(−0.380 m^(2)/s^(2))in July.