Two Flavors of Intraseasonal Variability and Their Dynamics in the North Equatorial Current/Undercurrent Region

doi:10.3389/fmars.2022.845575

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

	Two Flavors of Intraseasonal Variability and Their Dynamics in the North Equatorial Current/Undercurrent Region
	Wang, Zhenxiao 2,3,4; Zhang, Linlin 1,2,4; Hui, Yuchao 2,3; Wang, Fan 1,2,4; Hu, Dunxin 1,2,4
刊名	FRONTIERS IN MARINE SCIENCE
	2022-03-28
卷号	9 页码:16
关键词	intraseasonal variability North Equatorial Current meso-scale eddy baroclinic instability barotropic instability
DOI	10.3389/fmars.2022.845575
通讯作者	Zhang, Linlin(zhanglinlin@qdio.ac.cn)
英文摘要	Significant surface-intensified and subsurface-intensified intraseasonal variability (ISV) of the North Equatorial Current/Undercurrent with different periods are detected to coexist with mooring ADCP measurements at 13 degrees N, 130 degrees E. The ISV of the currents in the upper 200 m has a relatively shorter period of 45 days, while the period of the subsurface-intensified ISV between 400 and 800 m is around 85 days. By combining with sea surface height measurements from satellite altimeters and outputs from an eddy-resolving ocean general circulation model, the origin and dynamic mechanism of the two flavors of ISV are investigated. Eddy trajectory tracking and energy analysis indicate that both the surface-intensified and subsurface-intensified ISV are related to locally generated meso-scale eddies near the mooring sites. Stability analysis suggests the surface-intensified ISV is related to the baroclinic instability induced by the vertical velocity shear of the North Equatorial Current. While the generation of the subsurface-intensified ISV is more complex and is partly related to the enhanced barotropic instability induced by the intensified horizontal shear of the subsurface zonal background flow.
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
语种	英语
出版者	FRONTIERS MEDIA SA
WOS记录号	WOS:000790335200001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/178951]
专题	海洋研究所_海洋环流与波动重点实验室
通讯作者	Zhang, Linlin
作者单位	1.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhenxiao,Zhang, Linlin,Hui, Yuchao,et al. Two Flavors of Intraseasonal Variability and Their Dynamics in the North Equatorial Current/Undercurrent Region[J]. FRONTIERS IN MARINE SCIENCE,2022,9:16.
APA	Wang, Zhenxiao,Zhang, Linlin,Hui, Yuchao,Wang, Fan,&Hu, Dunxin.(2022).Two Flavors of Intraseasonal Variability and Their Dynamics in the North Equatorial Current/Undercurrent Region.FRONTIERS IN MARINE SCIENCE,9,16.
MLA	Wang, Zhenxiao,et al."Two Flavors of Intraseasonal Variability and Their Dynamics in the North Equatorial Current/Undercurrent Region".FRONTIERS IN MARINE SCIENCE 9(2022):16.