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
发表期刊SCIENCE CHINA-EARTH SCIENCES
卷号60期号:9页码:1719-1731
文章类型Article
摘要The 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.
关键词Ocean Eddies Western Tropical Pacific Three-dimensional Structure
DOI10.1007/s11430-016-9072-y
收录类别SCI
语种英语
WOS记录号WOS:000409376600014
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文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/143161
专题海洋环流与波动重点实验室
作者单位1.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
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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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