IOCAS-IR  > 海洋环流与波动重点实验室
Three-dimensional structure of mesoscale eddies in the western tropical Pacific as revealed by a high-resolution ocean simulation
Wang QingYe1,2
2017-09-01
Source PublicationSCIENCE CHINA-EARTH SCIENCES
Volume60Issue:9Pages:1719-1731
SubtypeArticle
AbstractThe three-dimensional structure of mesoscale eddies in the western tropical Pacific (6A degrees S-20A degrees N, 120A degrees E-150A degrees E) is investigated using a high-resolution ocean model simulation. Eddy detection and eddy tracking algorithms are applied to simulated horizontal velocity vectors, and the anticyclonic and cyclonic eddies identified are composited to obtain their three-dimensional structures. The mean lifetime of all long-lived eddies is about 52 days, and their mean diameter is 147 km. Two typical characteristics of mesoscale eddies are revealed and possible dynamic explanations are analyzed. One typical characteristic is that surface eddies are generally separated from subthermocline eddies along the bifurcation latitude (similar to 13A degrees N) of the North Equatorial Current in the western tropical Pacific, which may be associated with different eddy energy sources and vertical eddy energy fluxes in subtropical and tropical gyres. Surface eddies have maximum swirl velocities of 8-9 cm s(-1) and can extend to about 1500 m depth. Subthermocline eddies occur below 200 m, with their cores at about 400-600 m depth, and their maximum swirl velocities can reach 10 cm s(-1). The other typical characteristic is that the meridional velocity component of the eddy is much larger than the zonal component. This characteristic might be due to more zonal eddy pairs (two eddies at the same latitude), which is also supported by the zonal wavelength (about 200 km) in the high-frequency meridional velocity component of the horizontal velocity.
KeywordOcean Eddies Western Tropical Pacific Three-dimensional Structure
DOI10.1007/s11430-016-9072-y
Indexed BySCI
Language英语
WOS IDWOS:000409376600014
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Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143161
Collection海洋环流与波动重点实验室
Affiliation1.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Qingdao 266071, Peoples R China
First Author Affilication中国科学院海洋研究所
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GB/T 7714
Wang QingYe. Three-dimensional structure of mesoscale eddies in the western tropical Pacific as revealed by a high-resolution ocean simulation[J]. SCIENCE CHINA-EARTH SCIENCES,2017,60(9):1719-1731.
APA Wang QingYe.(2017).Three-dimensional structure of mesoscale eddies in the western tropical Pacific as revealed by a high-resolution ocean simulation.SCIENCE CHINA-EARTH SCIENCES,60(9),1719-1731.
MLA Wang QingYe."Three-dimensional structure of mesoscale eddies in the western tropical Pacific as revealed by a high-resolution ocean simulation".SCIENCE CHINA-EARTH SCIENCES 60.9(2017):1719-1731.
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