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The decadally modulating eddy field in the upstream Kuroshio Extension and its related mechanisms
Wang Shihong1,2; Liu Zhiliang1; Pang Chongguang1; Liu Huiqing3
2016-05-01
发表期刊ACTA OCEANOLOGICA SINICA
卷号35期号:5页码:9-17
文章类型Article
摘要Both the level of the high-frequency eddy kinetic energy (HF-EKE) and the energy-containing scale in the upstream Kuroshio Extension (KE) undergo a well-defined decadal modulation, which correlates well with the decadal KE path variability. The HF-EKE level and the energy-containing scales will increase with unstable KE path and decrease with stable KE path. Also the mesoscale eddies are a little meridionally elongated in the stable state, while they are much zonally elongated in the unstable state. The local baroclinic instability and the barotropic instability associated with the decadal modulation of HF-EKE have been investigated. The results show that the baroclinic instability is stronger in the stable state than that in the unstable state, with a shorter characteristic temporal scale and a larger characteristic spatial scale. Meanwhile, the regional-averaged barotropic conversion rate is larger in the unstable state than that in the stable state. The results also demonstrate that the baroclinic instability is not the dominant mechanism influencing the decadal modulation of the mesoscale eddy field, while the barotropic instability makes a positive contribution to the decadal modulation.
关键词Kuroshio Extension Mesoscale Eddy Decadal Modulation Baroclinic Instability Barotropic Energy Conversion Rate Nonlinear Eddy-eddy Interaction
DOI10.1007/s13131-015-0741-5
收录类别SCI
语种英语
WOS记录号WOS:000376049600002
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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/337002/131073
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.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
3.Florida Int Univ, Int Hurricane Res Ctr, MARC 370, Miami, FL 33199 USA
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Wang Shihong,Liu Zhiliang,Pang Chongguang,et al. The decadally modulating eddy field in the upstream Kuroshio Extension and its related mechanisms[J]. ACTA OCEANOLOGICA SINICA,2016,35(5):9-17.
APA Wang Shihong,Liu Zhiliang,Pang Chongguang,&Liu Huiqing.(2016).The decadally modulating eddy field in the upstream Kuroshio Extension and its related mechanisms.ACTA OCEANOLOGICA SINICA,35(5),9-17.
MLA Wang Shihong,et al."The decadally modulating eddy field in the upstream Kuroshio Extension and its related mechanisms".ACTA OCEANOLOGICA SINICA 35.5(2016):9-17.
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