IOCAS-IR  > 海洋环流与波动重点实验室
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
Source PublicationACTA OCEANOLOGICA SINICA
Volume35Issue:5Pages:9-17
SubtypeArticle
AbstractBoth 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.
KeywordKuroshio Extension Mesoscale Eddy Decadal Modulation Baroclinic Instability Barotropic Energy Conversion Rate Nonlinear Eddy-eddy Interaction
DOI10.1007/s13131-015-0741-5
Indexed BySCI
Language英语
WOS IDWOS:000376049600002
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/131073
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.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
First Author AffilicationKey Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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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