Spatial distribution of turbulent mixing in the upper ocean of the South China Sea
Shang, XD; Liang, CR; Chen, GY; xdshang@scsio.ac.cn
2017
发表期刊OCEAN SCIENCE
卷号13期号:3页码:503-519
摘要The spatial distribution of the dissipation rate (epsilon) and diapycnal diffusivity (kappa) in the upper ocean of the South China Sea (SCS) is presented from a measurement program conducted from 26 April to 23 May 2010. In the vertical distribution, the dissipation rates below the surface mixed layer were predominantly high in the thermocline where shear and stratification were strong. In the regional distribution, high dissipation rates and diapycnal diffusivities were observed in the region to the west of the Luzon Strait, with an average dissipation rate and diapycnal diffusivity of 8.3 x 10(-9) W kg(-1) and 2.7 x 10(-5) m(2) s(-1), respectively, almost 1 order of magnitude higher than those in the central and southern SCS. In the region to the west of the Luzon Strait, the water column was characterized by strong shear and weak stratification. Elevated dissipation rates (epsilon > 10(-7) W kg(-1)) and diapycnal diffusivities (kappa > 10(-4) m(2) s(-1)), induced by shear instability, occurred in the water column. In the central and southern SCS, the water column was characterized by strong stratification and weak shear and the turbulent mixing was weak. Internal waves and internal tides generated near the Luzon Strait are expected to make a dominant contribution to the strong turbulent mixing and shear in the region to the west of the Luzon Strait. The observed dissipation rates were found to scale positively with the shear and stratification, which were consistent with the MacKinnon-Gregg model used for the continental shelf but different from the Gregg-Henyey scaling used for the open ocean.
部门归属[Shang, Xiao-Dong; Liang, Chang-Rong; Chen, Gui-Ying] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China; [Liang, Chang-Rong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
资助项目LTO
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16457
专题热带海洋环境国家重点实验室(LTO)
通讯作者xdshang@scsio.ac.cn
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GB/T 7714
Shang, XD,Liang, CR,Chen, GY,et al. Spatial distribution of turbulent mixing in the upper ocean of the South China Sea[J]. OCEAN SCIENCE,2017,13(3):503-519.
APA Shang, XD,Liang, CR,Chen, GY,&xdshang@scsio.ac.cn.(2017).Spatial distribution of turbulent mixing in the upper ocean of the South China Sea.OCEAN SCIENCE,13(3),503-519.
MLA Shang, XD,et al."Spatial distribution of turbulent mixing in the upper ocean of the South China Sea".OCEAN SCIENCE 13.3(2017):503-519.
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