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Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean
Zhang, Zhixiang1,2,3,4; Wang, Jianing1,2,3,4; Wang, Fan1,2,3,4; Ma, Qiang1,2,3,4
2022-04-01
发表期刊JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
ISSN2169-9275
卷号127期号:4页码:19
通讯作者Wang, Jianing([email protected]) ; Wang, Fan([email protected])
摘要Strong multi-timescale variabilities of subsurface zonal velocity over 300-600 m depth are observed beneath the North Equatorial Countercurrent (NECC) by the mooring observation at 4.7 degrees N, 140 degrees E during 2014-2018. The observed subsurface velocity shows peaks at intraseasonal, semiannual, and annual periods, and is interconnected with the El Nino-Southern Oscillation (ENSO) cycle at a nearly zero lag. Aided by a reanalysis product, we reveal mechanisms for the above variabilities. Forced by wind stress curl over 150 degrees-155 degrees E and 160 degrees-170 degrees E along 4.7 degrees N, the vertical propagation of the third meridional mode long Rossby waves is primarily responsible for the observed semiannual and annual cycles, respectively. The subsurface intraseasonal variability with peak periods of 50- and 80-day are induced by short Rossby waves with the southeastward and downward group velocity. Such waves interconnect observed 50- and 80-day ISV of the subsurface current to that of surface currents at 8 degrees N, 128 degrees-130 degrees E and 6.5 degrees N, 132 degrees-134 degrees E, respectively. The ENSO variability results mainly from the interannual change of the winds that force the long Rossby waves. The wind forcing leads the Nino 3.4 index and the subsurface velocity by a similar time, resulting in the subsurface instantaneous response to ENSO.
关键词equatorial Rossby waves subsurface variability intraseasonal variability annual variability interannual variability
DOI10.1029/2021JC017969
收录类别SCI
语种英语
资助项目National Natural Science Foundation of China (NSFC)[42106009]; NSFC[42006003]; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22000000]; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-SYS034]
WOS研究方向Oceanography
WOS类目Oceanography
WOS记录号WOS:000781720200001
出版者AMER GEOPHYSICAL UNION
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被引频次:2[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/337002/178694
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, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China
3.Chinese Acad Sci, Cente Ocean Megasci, Qingdao, Peoples R China
4.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
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Zhang, Zhixiang,Wang, Jianing,Wang, Fan,et al. Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2022,127(4):19.
APA Zhang, Zhixiang,Wang, Jianing,Wang, Fan,&Ma, Qiang.(2022).Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,127(4),19.
MLA Zhang, Zhixiang,et al."Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 127.4(2022):19.
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