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学科主题: Oceanography
题名: Delving into three-dimensional structure of the West Luzon Eddy in a regional ocean model
作者: Wang, L ; Gan, JP
通讯作者: magan@ust.hk
关键词: Ocean Eddy ; Dipole Eddy ; Eddy Energy ; Numerical modeling ; West Luzon Eddy ; South China Sea
刊名: DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
发表日期: 2014
卷: 90, 页:48-61
收录类别: sci
部门归属: [Wang, Lei ; Gan, Jianping] Hong Kong Univ Sci & Technol, Dept Math, Hong Kong, Hong Kong, Peoples R China ; [Wang, Lei ; Gan, Jianping] Hong Kong Univ Sci & Technol, Div Environm, Hong Kong, Hong Kong, Peoples R China ; [Wang, Lei] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou, Guangdong, Peoples R China
项目归属: LTO
资助者: Key Project of the National Science Foundation of China (NSFC) [91228202]; National Key Basic Research Development Program [2014CB441501]; Hong Kong's Research Grant Council [GRF601009]
摘要: The three-dimensional structure and associated dynamics of the prominent cold (cyclonic) West Luzon Eddy (WLE) were investigated by a high-resolution regional ocean model. The WLE was horizontally and vertically heterogeneous, exhibiting asymmetric structures in the circulation, vorticity, vertical motion and energy distributions within the eddy. The asymmetry was mainly attributed to the existence of an eddy dipole formed by a coexisting warm (anti-cyclonic) eddy to the south of the WLE. Analysis of the momentum balance revealed that the coexistence of two eddies intensified barotropic pressure gradients in the southern WLE to locally enhance the eastward jet. The positive (negative) vorticity of the jet strengthened (weakened) the eddy in the southern sector (periphery), which, together with the formation of a subsurface density front, intensified (suppressed) the corresponding upward motion and cooling. The baroclinic pressure gradients opposed the dominant barotropic components and spun down the eddy at greater depths with stronger weakening in the southern sector near the front. Asymmetric energy distributions showed that larger mean kinetic energy (MKE) and eddy available potential energy (EAPE) were stored in the southern sector of the WLE. While the larger MICE was directly linked with the stronger barotropic currents, the larger EAPE in the southern WLE was formed by baroclinic energy conversions due to a strong density gradient at the front. (C) 2014 Elsevier Ltd. All rights reserved.
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WOS记录号: WOS:000338978400005
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/10523
Appears in Collections:热带海洋环境国家重点实验室(LTO)_期刊论文

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Wang, L; Gan, JP.Delving into three-dimensional structure of the West Luzon Eddy in a regional ocean model,DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2014,90():48-61
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