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

文献类型：期刊论文

作者Ma, Weidong1,2; Wang, Jianing1,2,3; Wang, Fan1,2,3; Zhang, Zhixiang1,2,3; Ma, Qiang1,2,3
刊名DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
出版日期2023-07-01
卷号197页码:12
关键词Deep currents Full-depth velocity Southern Philippine Basin Intraseasonal variability Deep eddy
ISSN号0967-0637
DOI10.1016/j.dsr.2023.104043
通讯作者Wang, Jianing(wjn@qdio.ac.cn) ; Wang, Fan(fwang@qdio.ac.cn)
英文摘要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.
WOS关键词NORTH EQUATORIAL CURRENT ; WESTERN BOUNDARY CURRENTS ; PACIFIC-OCEAN ; MINDANAO CURRENT ; KUROSHIO ; SURFACE ; CIRCULATION ; MODEL
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
语种英语
WOS记录号WOS:001003827800001
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://ir.qdio.ac.cn/handle/337002/182424]  
专题海洋研究所_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.Univ Chinese Acad Sci, Beijing, Peoples R China
2.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
3.Pilot Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao, Peoples R China
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.

入库方式： OAI收割

来源：海洋研究所

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