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题名: Three-dimensional structure of mesoscale eddies in the western tropical Pacific as revealed by a high-resolution ocean simulation
作者: Wang QingYe1,2
刊名: SCIENCE CHINA-EARTH SCIENCES
出版日期: 2017-09-01
卷号: 60, 期号:9, 页码:1719-1731
关键词: Ocean eddies ; Western tropical Pacific ; Three-dimensional structure
DOI: 10.1007/s11430-016-9072-y
文章类型: Article
英文摘要: 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000409376600014
Citation statistics:
内容类型: 期刊论文
版本: 出版稿
URI标识: http://ir.qdio.ac.cn/handle/337002/143161
Appears in Collections:海洋环流与波动重点实验室_期刊论文

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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

Recommended Citation:
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.
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文件名: Three-dimensional structure of mesoscale eddies in the western tropical Pacific as revealed by a high-resolution ocean simulation.pdf
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