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| Wave, Vortex and Wave-Vortex Dipole (Instability Wave): Three Flavors of the Intra-Seasonal Variability of the North Equatorial Undercurrent | |
Liu, Chuanyu1,2,3; Feng, Ling1,3; Koehl, Armin4; Liu, Zhiyu5,6; Wang, Fan1,2,3
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| 2022-06-16 | |
| 发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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| ISSN | 0094-8276 |
| 卷号 | 49期号:11页码:9 |
| 通讯作者 | Feng, Ling(lingfeng@qdio.ac.cn) ; Wang, Fan(fwang@qdio.ac.cn) |
| 摘要 | Intra-seasonal variations have been frequently observed in the North Equatorial Undercurrent (NEUC) jets, yet their dynamical nature remains elusive. Based on field observations and model results, we identify three flavors of the ISVs: Wave (accounting for 10%), wave-vortex dipole (WVD) (20%) and vortex (70%). The wave flavor refers to a Rossby wave, the WVD flavor consists of a pair of counter-rotating vortices, and the vortex flavor refers to a sub-thermocline monopole eddy. To our knowledge, the WVD is identified for the first time and is found characterized by a unique dynamical feature: It manifests both as a second baroclinic mode-like Rossby wave and as a pair of dipole-like sub-thermocline eddies. It is further identified as a second baroclinic mode-like Rossby wave-initiated instability wave in an equilibrium being fueled by baroclinic conversion. These results indicate that mesoscale instability waves are an important component of subthermocline intra-seasonal and mesoscale variations. |
| 关键词 | North Equatorial Undercurrent intra-seasonal variability subthermocline instability wave eddy baroclinic instability |
| DOI | 10.1029/2021GL097239 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences (CAS)[XDB42000000] ; National Natural Science Foundation of China[41976012] ; National Natural Science Foundation of China[41730534] |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:000810492600001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/179501 |
| 专题 | 海洋环流与波动重点实验室 |
| 通讯作者 | Feng, Ling; Wang, Fan |
| 作者单位 | 1.Chinese Acad Sci IOCAS, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao QNLM, Marine Dynam Proc & Climate Funct Lab, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 4.Univ Hamburg, Ctr Earth Syst Res & Sustainabil CEN, Inst Oceanog Ifm, Hamburg, Germany 5.Xiamen Univ, Coll Ocean & Earth Sci, State Key Lab Marine Environm Sci, Xiamen, Peoples R China 6.Xiamen Univ, Coll Ocean & Earth Sci, Dept Phys Oceanog, Xiamen, Peoples R China |
| 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 | Liu, Chuanyu,Feng, Ling,Koehl, Armin,et al. Wave, Vortex and Wave-Vortex Dipole (Instability Wave): Three Flavors of the Intra-Seasonal Variability of the North Equatorial Undercurrent[J]. GEOPHYSICAL RESEARCH LETTERS,2022,49(11):9. |
| APA | Liu, Chuanyu,Feng, Ling,Koehl, Armin,Liu, Zhiyu,&Wang, Fan.(2022).Wave, Vortex and Wave-Vortex Dipole (Instability Wave): Three Flavors of the Intra-Seasonal Variability of the North Equatorial Undercurrent.GEOPHYSICAL RESEARCH LETTERS,49(11),9. |
| MLA | Liu, Chuanyu,et al."Wave, Vortex and Wave-Vortex Dipole (Instability Wave): Three Flavors of the Intra-Seasonal Variability of the North Equatorial Undercurrent".GEOPHYSICAL RESEARCH LETTERS 49.11(2022):9. |
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