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

doi:10.3389/fmars.2022.845575

IOCAS-IR > 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, Zhenxiao1,2,3 ; Zhang, Linlin 1,2,4; Hui, Yuchao 1,3; Wang, Fan1,2,4 ; Hu, Dunxin 1,2,4
	2022-03-28
发表期刊	FRONTIERS IN MARINE SCIENCE
卷号	9 页码:16
通讯作者	Zhang, Linlin(zhanglinlin@qdio.ac.cn)
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.
关键词	intraseasonal variability North Equatorial Current meso-scale eddy baroclinic instability barotropic instability
DOI	10.3389/fmars.2022.845575
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Marine & Freshwater Biology
WOS记录号	WOS:000790335200001
出版者	FRONTIERS MEDIA SA
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/178952
专题	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, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China
第一作者单位	海洋环流与波动重点实验室
通讯作者单位	海洋环流与波动重点实验室
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.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
fmars-09-845575.pdf（12649KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	浏览