Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean

doi:10.1029/2021JC017969

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

	Intraseasonal, Annual, and Interannual Variabilities of Subsurface Currents at 4.7 degrees N in the Western Pacific Ocean
	Zhang, Zhixiang 1,2,3,4; Wang, Jianing 1,2,3,4; Wang, Fan 1,2,3,4; Ma, Qiang 1,2,3,4
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
	2022-04-01
卷号	127 期号:4 页码:19
关键词	equatorial Rossby waves subsurface variability intraseasonal variability annual variability interannual variability
ISSN号	2169-9275
DOI	10.1029/2021JC017969
通讯作者	Wang, Jianing(wjn@qdio.ac.cn) ; Wang, Fan(fwang@qdio.ac.cn)
英文摘要	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.
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
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000781720200001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/178693]
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.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol, Funct Lab Ocean Dynam & Climate, Qingdao, Peoples R China 4.Chinese Acad Sci, Cente Ocean Megasci, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	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.