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Observed Cross-Shelf Flow Induced by Mesoscale Eddies in the Northern South China Sea
Wang, Q; Zeng, LL; Li, J; Chen, J; He, YK; Yao, JL; Wang, DX; Zhou, WD; dxwang@scsio.ac.cn
2018
Source PublicationJOURNAL OF PHYSICAL OCEANOGRAPHY
Volume48Issue:7Pages:1609-1628
AbstractCross-shelf flow induced by mesoscale eddies has been investigated in the northern South China Sea (NSCS) using velocity observations from Long Ranger ADCP moorings. Mesoscale eddies influenced the three mooring stations during almost all the observation period. Four quadrants have been defined with the mooring location as the origin, and it is found that warm (cold) mesoscale eddies induce onshore (offshore) movement in the eastern two quadrants and offshore (onshore) movement in the western two quadrants. When an eddy propagates past a mooring station, net cross-shelf flow at the mooring station can be induced by asymmetry in the horizontal and vertical structure of the eddy and by its evolution. As an eddy propagates westward, its shape changes continually and the vertical modes also transform from high to lower modes, which contributes to the net cross-shelf flow. Based on the quasigeostrophic potential vorticity equation, it is confirmed that the net cross-shelf flow is mainly induced by the eddy evolution and suppressed by nonlinear effect. Because of dispersion characteristics of the mesoscale eddy, barotropic mode will restructure at the baroclinic mode area after separating from the baroclinic mode, which will be enhanced by topography slope.
Department[Wang, Qiang; Zeng, Lili; Li, Jian; Chen, Ju; He, Yunkai; Yao, Jinglong; Wang, Dongxiao; Zhou, Weidong] Chinese Acad Sci, State Key Lab Trop Oceanog, South China Sea Inst Oceanol, Guangzhou, Guangdong, Peoples R China
KeywordEddies Ocean Circulation
Subject AreaOceanography
Funding ProjectLTO
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17058
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authordxwang@scsio.ac.cn
Recommended Citation
GB/T 7714
Wang, Q,Zeng, LL,Li, J,et al. Observed Cross-Shelf Flow Induced by Mesoscale Eddies in the Northern South China Sea[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2018,48(7):1609-1628.
APA Wang, Q.,Zeng, LL.,Li, J.,Chen, J.,He, YK.,...&dxwang@scsio.ac.cn.(2018).Observed Cross-Shelf Flow Induced by Mesoscale Eddies in the Northern South China Sea.JOURNAL OF PHYSICAL OCEANOGRAPHY,48(7),1609-1628.
MLA Wang, Q,et al."Observed Cross-Shelf Flow Induced by Mesoscale Eddies in the Northern South China Sea".JOURNAL OF PHYSICAL OCEANOGRAPHY 48.7(2018):1609-1628.
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