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Tracking the evolution processes and behaviors of mesoscale eddies in the South China Sea: a global nearest neighbor filter approach
Yi, Jiawei1,2; Du, Yunyan1,2; Wang, Dongxiao3; Zhou, Chenghu1,2
2017-11-01
Source PublicationACTA OCEANOLOGICA SINICA
ISSN0253-505X
Volume36Issue:11Pages:27-37
Corresponding AuthorDu, Yunyan(duyy@lreis.ac.cn)
AbstractThe eddy tracking approach is developed using the global nearest neighbor filter (GNNF) to investigate the evolution processes and behaviors of mesoscale eddies in the South China Sea (SCS). Combining the Kalman filter and optimal data association technologies, the GNNF algorithm is able to reduce pairing errors to 0.2% in tracking synthetic eddy tracks, outperforming other existing methods. A total of 4 913 eddy tracks that last more than a week are obtained by the GNNF during 1993-2012. The analysis of a growth and a decay based on 3 445 simple eddy tracks show that eddy radius, amplitude, and vorticity smoothly increase during the first half of lifetime and decline during the second half following a parabola opening downwards. The genesis of eddies mainly clusters northwest and southwest of Luzon Island whereas the dissipations concentrate the Xisha Islands where the underwater bay traps and terminates eddies. West of the Luzon Strait, northwest of Luzon Island, and southeast of Vietnam are regions where eddy splits and mergers are frequently observed. Short disappearances mainly distribute in the first two regions. Moreover, eddy splits generally result in a decrease of the radius and the amplitude whereas eddy mergers induce growing up. Eddy intensity and vorticity, on the contrary, are strengthened in the eddy splits and diminished in mergers.
Keywordmesoscale ocean eddies eddy tracking eddy split eddy merger South China Sea
DOI10.1007/s13131-017-1136-6
WOS KeywordEDDY DETECTION ; ALGORITHMS ; VORTICES ; QUANTIFICATION ; IDENTIFICATION ; CIRCULATION ; DYNAMICS ; PATTERNS ; GEOMETRY ; MODEL
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41421001] ; National Natural Science Foundation of China[41371378]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000414992900005
PublisherSPRINGER
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/61232
Collection中国科学院地理科学与资源研究所
Corresponding AuthorDu, Yunyan
Affiliation1.Chinese Acad Sci, State Key Lab Resources & Environm Informat Syst, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog LTO, Guangzhou 510301, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Yi, Jiawei,Du, Yunyan,Wang, Dongxiao,et al. Tracking the evolution processes and behaviors of mesoscale eddies in the South China Sea: a global nearest neighbor filter approach[J]. ACTA OCEANOLOGICA SINICA,2017,36(11):27-37.
APA Yi, Jiawei,Du, Yunyan,Wang, Dongxiao,&Zhou, Chenghu.(2017).Tracking the evolution processes and behaviors of mesoscale eddies in the South China Sea: a global nearest neighbor filter approach.ACTA OCEANOLOGICA SINICA,36(11),27-37.
MLA Yi, Jiawei,et al."Tracking the evolution processes and behaviors of mesoscale eddies in the South China Sea: a global nearest neighbor filter approach".ACTA OCEANOLOGICA SINICA 36.11(2017):27-37.
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