The vertical structure and intraseasonal variability of the deep currents in the Southern Philippine Basin

doi:10.1016/j.dsr.2023.104043

IOCAS-IR > 海洋环流与波动重点实验室

	The vertical structure and intraseasonal variability of the deep currents in the Southern Philippine Basin
	Ma, Weidong 1,3; Wang, Jianing1,2,3 ; Wang, Fan1,2,3 ; Zhang, Zhixiang1,2,3 ; Ma, Qiang1,2,3
	2023-07-01
发表期刊	DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN	0967-0637
卷号	197 页码:12
通讯作者	Wang, Jianing(wjn@qdio.ac.cn) ; Wang, Fan(fwang@qdio.ac.cn)
摘要	Based on the four-mooring array measurements along 130 degrees E over 2015-2020, the vertical structure and variability of deep currents in the central Southern Philippine Basin (SPB) are revealed. The deep currents below 1500 m in the central SPB are characterized by alternating westward and eastward zonal jets with strong intraseasonal variability (ISV). These zonal jets have a weak mean velocity of less than 1.5 cm s(-1) but vary with a relatively large amplitude of 10 cm s(-1) at the intraseasonal period of 20-120 days. The full-depth zonal velocity in the central SPB has three typical vertical structures that are mainly controlled by the first baroclinic mode, the second and higher baroclinic modes, and the barotropic mode in descending order of occurrence frequency. These structures are vertically coherent below similar to 2000-2500 m, below similar to 1200 m, and over the whole water column, respectively. Further analysis of numerical ocean modeling results demonstrates that the ISV of deep currents is induced by the deep mesoscale eddy. The deep ISV intensifies when a deep eddy passes by and keeps at a low value when there is no deep eddy activity around. The deep eddy extends to the bottom with the upper boundaries at similar to 1500 m below the subsurface layer or at similar to 300 m including the subsurface layer. These deep eddies arise primarily from barotropic instability and secondarily from baroclinic instability.
关键词	Deep currents Full-depth velocity Southern Philippine Basin Intraseasonal variability Deep eddy
DOI	10.1016/j.dsr.2023.104043
收录类别	SCI
语种	英语
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences (CAS)[XDA22000000] ; National Natural Science Foundation of China (NSFC)[91958204] ; National Natural Science Foundation of China (NSFC)[42222602] ; Science and Technology Innovation Project of Laoshan Laboratory[LSKJ202203100] ; Youth Innovation Promotion Association CAS ; TS Scholar Program ; NSFC[42006003] ; NSFC[42221005] ; NSFC[42090040] ; NSFC[42106009]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001003827800001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	NORTH EQUATORIAL CURRENT ; WESTERN BOUNDARY CURRENTS ; PACIFIC-OCEAN ; MINDANAO CURRENT ; KUROSHIO ; SURFACE ; CIRCULATION ; MODEL
引用统计	被引频次：1[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/337002/182425
专题	海洋环流与波动重点实验室
通讯作者	Wang, Jianing; Wang, Fan
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, Lab Ocean & Climate Dynam, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, 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	Ma, Weidong,Wang, Jianing,Wang, Fan,et al. The vertical structure and intraseasonal variability of the deep currents in the Southern Philippine Basin[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2023,197:12.
APA	Ma, Weidong,Wang, Jianing,Wang, Fan,Zhang, Zhixiang,&Ma, Qiang.(2023).The vertical structure and intraseasonal variability of the deep currents in the Southern Philippine Basin.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,197,12.
MLA	Ma, Weidong,et al."The vertical structure and intraseasonal variability of the deep currents in the Southern Philippine Basin".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 197(2023):12.