Institutional Repository of Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Energetics of Eddy-Mean Flow Interactions along the Western Boundary Currents in the North Pacific | |
Yan, Xiaomei1,2,3,4; Kang, Dujuan4; Curchitser, Enrique N.4; Pang, Chongguang1,2,3 | |
2019-03-01 | |
发表期刊 | JOURNAL OF PHYSICAL OCEANOGRAPHY |
ISSN | 0022-3670 |
卷号 | 49期号:3页码:789-810 |
通讯作者 | Yan, Xiaomei(yanxiaomei@qdio.ac.cn) |
摘要 | The energetics of eddy-mean flow interactions along two western boundary currents of the North Pacific, the Kuroshio and Ryukyu Currents, are systematically investigated using 22 years of numerical data from the Ocean General Circulation Model for the Earth Simulator (OFES). For the time-mean and time-varying flow fields, all the energy components and conversions exhibit inhomogeneous spatial distributions. In the two currents, complex cross-stream and along-stream variations are seen in the eddy-mean flow energy conversions. East of Taiwan, the kinetic energy is mainly transferred from the mean flow to the eddy field through barotropic instability, whereas the baroclinic energy conversions form a meridional dipole structure caused by the topographic constraint. In the northern area, particularly, the eddy field drains 2.25 x 10(8) W of kinetic energy and releases 2.82 x 10(8) W of available potential energy when interacting with the mean flow, indicating that mesoscale eddies impinging on the Kuroshio decay with baroclinic inverse energy cascades. In the Ryukyu Current, inverse energy conversions from the eddy field to the mean flow also dominate the power transfer in the subsurface layer. The eddy field transfers 0.16 x 10(8) W of kinetic energy and 1.89 x 10(8) W of available potential energy to the mean flow, suggesting that meososcale eddies play an important role in maintaining the velocity and hydrographic structure of the current. In other areas, both barotropic and baroclinic instabilities contribute to the generation of eddy kinetic energy with the latter one providing more than 3 times as much power as the former one. |
关键词 | Boundary currents Eddies Mesoscale processes Ocean circulation Ocean dynamics |
DOI | 10.1175/JPO-D-18-0201.1 |
收录类别 | SCI |
语种 | 英语 |
资助项目 | NSFC Shandong Joint Fund for Marine Science Research Centers[U1406401] ; National Key R&D Program of China[2016YFC0301203] ; AoShan Science and Technology Innovation Program[2016AKSJ12] ; National Natural Science Foundation of China[41576060] ; National Natural Science Foundation of China[41776021] ; National Natural Science Foundation of China[41606016] ; National Natural Science Foundation of China[41606016] ; National Natural Science Foundation of China[41776021] ; National Natural Science Foundation of China[41576060] ; AoShan Science and Technology Innovation Program[2016AKSJ12] ; National Key R&D Program of China[2016YFC0301203] ; NSFC Shandong Joint Fund for Marine Science Research Centers[U1406401] |
WOS研究方向 | Oceanography |
WOS类目 | Oceanography |
WOS记录号 | WOS:000460532000001 |
出版者 | AMER METEOROLOGICAL SOC |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.qdio.ac.cn/handle/337002/155307 |
专题 | 海洋环流与波动重点实验室 |
通讯作者 | Yan, Xiaomei |
作者单位 | 1.Chinese Acad Sci, CAS Key Lab Ocean Circulat & Waves, Inst Oceanol, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 4.Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08901 USA |
第一作者单位 | 中国科学院海洋研究所 |
通讯作者单位 | 中国科学院海洋研究所 |
推荐引用方式 GB/T 7714 | Yan, Xiaomei,Kang, Dujuan,Curchitser, Enrique N.,et al. Energetics of Eddy-Mean Flow Interactions along the Western Boundary Currents in the North Pacific[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2019,49(3):789-810. |
APA | Yan, Xiaomei,Kang, Dujuan,Curchitser, Enrique N.,&Pang, Chongguang.(2019).Energetics of Eddy-Mean Flow Interactions along the Western Boundary Currents in the North Pacific.JOURNAL OF PHYSICAL OCEANOGRAPHY,49(3),789-810. |
MLA | Yan, Xiaomei,et al."Energetics of Eddy-Mean Flow Interactions along the Western Boundary Currents in the North Pacific".JOURNAL OF PHYSICAL OCEANOGRAPHY 49.3(2019):789-810. |
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Energetics of Eddy-M(7956KB) | 期刊论文 | 出版稿 | 限制开放 | CC BY-NC-SA | 浏览 |
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