The Observed North Equatorial Countercurrent in the Far Western Pacific Ocean during the 2014-16 El Nino

doi:10.1175/JPO-D-20-0293.1

IOCAS-IR > 海洋环流与波动重点实验室

	The Observed North Equatorial Countercurrent in the Far Western Pacific Ocean during the 2014-16 El Nino
	Zhou, Hui 1,2,3; Liu, Hengchang 1,2,3; Tan, Shuwen 1,2,3; Yang, Wenlong 1,2,3; Li, Yao 1,2; Liu, Xueqi 1,2,3; Ren, Qiang1,2 ; Dewar, William K.4,5
	2021-06-01
发表期刊	JOURNAL OF PHYSICAL OCEANOGRAPHY
ISSN	0022-3670
卷号	51 期号:6 页码:2003-2020
通讯作者	Zhou, Hui(zhouhui@qdio.ac.cn)
摘要	The structure and variations of the North Equatorial Countercurrent (NECC) in the far western Pacific Ocean during 2014-16 are investigated using repeated in situ hydrographic data, altimeter data, Argo data, and reanalysis data. The NECC shifted similar to 1 degrees southward and intensified significantly with its transport exceeding 40 Sv (1 Sv equivalent to 10(6) m(3) s(-1)), nearly double its climatology value, during the developing phase of the 2015/16 El Nino event. Observations show that the 2015/16 El Nino exerted a comparable impact on the NECC with that of the extreme 1997/98 El Nino in the far western Pacific Ocean. Baroclinic instability provided the primary energy source for the eddy kinetic energy (EKE) in the 2015/16 El Nino, which differs from the traditional understanding of the energy source of EKE as barotropic instability in low-latitude ocean. The enhanced vertical shear and the reduced density jump between the NECC layer and the North Equatorial Subsurface Current (NESC) layer renders the NECC-NESC system baroclinically unstable in the western Pacific Ocean during El Nino developing phase. The eddy-mean flow interactions here are diverse associated with various states of El Nino- Southern Oscillation (ENSO).
关键词	Baroclinic flows El Nino ENSO Instability Ocean circulation Ocean dynamics
DOI	10.1175/JPO-D-20-0293.1
收录类别	SCI
语种	英语
资助项目	NSFC[41876009] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42000000] ; NSF[OCE-1829856] ; NSF[OCE-1941963] ; French Make Our Planet Great Again program[ANR-18-MPGA-0002]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:000751705900016
出版者	AMER METEOROLOGICAL SOC
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/337002/177795
专题	海洋环流与波动重点实验室
通讯作者	Zhou, Hui
作者单位	1.Chinese Acad Sci, Inst Oceanol, CAS Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Florida State Univ, Dept Ocean Atmosphere & Earth Sci, Tallahassee, FL 32306 USA 5.Univ Grenoble Alpes, CNRS, IRD, Grenoble INP,IGE, Grenoble, France
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Zhou, Hui,Liu, Hengchang,Tan, Shuwen,et al. The Observed North Equatorial Countercurrent in the Far Western Pacific Ocean during the 2014-16 El Nino[J]. JOURNAL OF PHYSICAL OCEANOGRAPHY,2021,51(6):2003-2020.
APA	Zhou, Hui.,Liu, Hengchang.,Tan, Shuwen.,Yang, Wenlong.,Li, Yao.,...&Dewar, William K..(2021).The Observed North Equatorial Countercurrent in the Far Western Pacific Ocean during the 2014-16 El Nino.JOURNAL OF PHYSICAL OCEANOGRAPHY,51(6),2003-2020.
MLA	Zhou, Hui,et al."The Observed North Equatorial Countercurrent in the Far Western Pacific Ocean during the 2014-16 El Nino".JOURNAL OF PHYSICAL OCEANOGRAPHY 51.6(2021):2003-2020.