Wave, Vortex and Wave-Vortex Dipole (Instability Wave): Three Flavors of the Intra-Seasonal Variability of the North Equatorial Undercurrent

doi:10.1029/2021GL097239

CORC > 海洋研究所 > 中国科学院海洋研究所 > 海洋环流与波动重点实验室

	Wave, Vortex and Wave-Vortex Dipole (Instability Wave): Three Flavors of the Intra-Seasonal Variability of the North Equatorial Undercurrent
	Liu, Chuanyu 4,5,6; Feng, Ling 4,6; Koehl, Armin 1; Liu, Zhiyu 2,3; Wang, Fan 4,5,6
刊名	GEOPHYSICAL RESEARCH LETTERS
	2022-06-16
卷号	49 期号:11 页码:9
关键词	North Equatorial Undercurrent intra-seasonal variability subthermocline instability wave eddy baroclinic instability
ISSN号	0094-8276
DOI	10.1029/2021GL097239
通讯作者	Feng, Ling(lingfeng@qdio.ac.cn) ; Wang, Fan(fwang@qdio.ac.cn)
英文摘要	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.
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
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000810492600001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/179500]
专题	海洋研究所_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.Univ Hamburg, Ctr Earth Syst Res & Sustainabil CEN, Inst Oceanog Ifm, Hamburg, Germany 2.Xiamen Univ, Coll Ocean & Earth Sci, State Key Lab Marine Environm Sci, Xiamen, Peoples R China 3.Xiamen Univ, Coll Ocean & Earth Sci, Dept Phys Oceanog, Xiamen, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 5.Pilot Natl Lab Marine Sci & Technol Qingdao QNLM, Marine Dynam Proc & Climate Funct Lab, Qingdao, Peoples R China 6.Chinese Acad Sci IOCAS, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
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.