Deep water characteristics and circulation in the South China Sea
Wang, AM; Du, Y; Peng, SQ; Liu, KX; Huang, RX; duyan@scsio.ac.cn
2018
发表期刊DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
卷号134页码:55-63
摘要This study investigates the deep circulation in the South China Sea (SCS) using oceanographic observations combined with results from a bottom layer reduced gravity model. The SCS water, 2000 m below the surface, is quite different from that in the adjacent Pacific Ocean, and it is characterized by its low dissolved oxygen (DO), high temperature and low salinity. The horizontal distribution of deep water properties indicates a basin-scale cyclonic circulation driven by the Luzon overflow. The results of the bottom layer reduced gravity model are consistent with the existence of the cyclonic circulation in the deep SCS. The circulation is stronger at the northern/western boundary. After overflowing the sill of the Luzon Strait, the deep water moves broadly southwestward, constrained by the 3500 m isobath. The broadening of the southward flow is induced by the downwelling velocity in the interior of the deep basin. The main deep circulation bifurcates into two branches after the Zhongsha Islands. The southward branch continues flowing along the 3500 m isobath, and the eastward branch forms the sub-basin scale cyclonic circulation around the seamounts in the central deep SCS. The returning flow along the east boundary is fairly weak. The numerical experiments of the bottom layer reduced gravity model reveal the important roles of topography, bottom friction, and the upwelling/downwelling pattern in controlling the spatial structure, particularly the strong, deep western boundary current.
部门归属[Wang, Aimei; Du, Yan; Peng, Shiqiu; Huang, Rui Xin] Chinese Acad Sci, SCSIO, State Key Lab Trop Oceanog LTO, Guangzhou, Guangdong, Peoples R China; [Wang, Aimei; Liu, Kexiu] Natl Marine Data & Informat Serv, Tianjin, Peoples R China; [Wang, Aimei; Du, Yan; Peng, Shiqiu] Univ Chinese Acad Sci, Beijing, Peoples R China; [Huang, Rui Xin] Woods Hole Oceanog Inst, Dept Phys Oceanog, Woods Hole, MA 02543 USA
关键词South China Sea Deep Circulation Bottom Layer Reduced Gravity Model Overflow Dissolved Oxygen
学科领域Oceanography
资助项目LTO
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/17079
专题热带海洋环境国家重点实验室(LTO)
通讯作者duyan@scsio.ac.cn
推荐引用方式
GB/T 7714
Wang, AM,Du, Y,Peng, SQ,et al. Deep water characteristics and circulation in the South China Sea[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2018,134:55-63.
APA Wang, AM,Du, Y,Peng, SQ,Liu, KX,Huang, RX,&duyan@scsio.ac.cn.(2018).Deep water characteristics and circulation in the South China Sea.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,134,55-63.
MLA Wang, AM,et al."Deep water characteristics and circulation in the South China Sea".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 134(2018):55-63.
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