IOCAS-IR  > 海洋环流与波动重点实验室
Characteristics and maintenance mechanisms of the Cold Eddy to the Northeast of Diaoyu Island
Zhang, Yansheng1,3,5; Yu, Fei1,2,3,4,5; Si, Guangcheng1,2,4,5; Wang, Jianfeng1,2,4,5
2020-04-01
Source PublicationREGIONAL STUDIES IN MARINE SCIENCE
ISSN2352-4855
Volume36Pages:12
AbstractThe Cold Eddy to the Northeast of Diaoyu Island (CEND) was examined in detail using the Regional Ocean Model System (ROMS). Model results indicated the presence of a cyclonic semi-closed circular current in the upper 30 m of the East China Sea. This current is present from May to November, and extends over the area between 26.2 degrees N-27.5 degrees N and 122.5 degrees E-124 degrees E with a center at 26.8 degrees N, 123.5 degrees E. Simulations showed that this eddy reinforces the exchange between the shelf water and the Kuroshio. When the CEND is the strongest (August), although the total intrusion onto the inner continental shelf is minimal (0.12 Sv), flow off the continental shelf is three times that of total intrusion. Results from particle tracking experiments indicated that the bottom cold water of CEND originates from the subsurface Kuroshio off the northeast of Taiwan. On the basis of bottom topography experiments and analysis of the Joint Effect of Baroclinicity and Relief (JEBAR) term, we conclude that baroclinicity changes in April cause the subsurface Kuroshio water to intrude over the northeast of Diaoyu Island where it encounters topography that deepens sharply. This local topography causes the intruded water to be subjected to positive vortex-tube stretching, giving rise to a cyclonic semi-closed circular current and upwelling, forming the CEND. Similarly, baroclinicity changes in September weaken intrusion of subsurface Kuroshio water to the northeast of Diaoyu Island, thereby the supply of bottom water decrease and causing the CEND to disappear. The sharply deepening topography to the northeast of Diaoyu Island is a necessary condition for the formation of the CEND, and the seasonal variation of CEND is driven by variations in baroclinity. (c) 2020 Elsevier B.V. All rights reserved.
KeywordDiaoyu Island JEBAR ROMS
DOI10.1016/j.rsma.2020.101259
Indexed BySCI
Language英语
Funding ProjectNSFC-Shandong Joint Fund for Marine Science Research Centers[U1406401] ; National Key Research and Development Program of China[2017YFC1403401] ; National Natural Science Foundation of China (NSFC) Innovative Group Grant[41421005] ; National Key Research and Development Program of China[2016YFC1402501] ; National Key Research and Development Program of China[2016YFC1400505] ; NSFC[41706012]
WOS Research AreaEnvironmental Sciences & Ecology ; Marine & Freshwater Biology
WOS SubjectEcology ; Marine & Freshwater Biology
WOS IDWOS:000562971000018
PublisherELSEVIER
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Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/168328
Collection海洋环流与波动重点实验室
Corresponding AuthorYu, Fei
Affiliation1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
5.Pilot Natl Lab Marine Sci & Technol Qingdao, Marine Dynam Proc & Climate Funct Lab, Qingdao 266237, Peoples R China
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences;  Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang, Yansheng,Yu, Fei,Si, Guangcheng,et al. Characteristics and maintenance mechanisms of the Cold Eddy to the Northeast of Diaoyu Island[J]. REGIONAL STUDIES IN MARINE SCIENCE,2020,36:12.
APA Zhang, Yansheng,Yu, Fei,Si, Guangcheng,&Wang, Jianfeng.(2020).Characteristics and maintenance mechanisms of the Cold Eddy to the Northeast of Diaoyu Island.REGIONAL STUDIES IN MARINE SCIENCE,36,12.
MLA Zhang, Yansheng,et al."Characteristics and maintenance mechanisms of the Cold Eddy to the Northeast of Diaoyu Island".REGIONAL STUDIES IN MARINE SCIENCE 36(2020):12.
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