The Observed Impacts of the Two Types of El Nino on the North Equatorial Countercurrent in the Pacific Ocean

doi:10.1029/2018GL079273

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

	The Observed Impacts of the Two Types of El Nino on the North Equatorial Countercurrent in the Pacific Ocean
	Tan, Shuwen 1,2,3; Zhou, Hui 1,2,3,4
刊名	GEOPHYSICAL RESEARCH LETTERS
	2018-10-16
卷号	45 期号:19 页码:10493-10500
ISSN号	0094-8276
DOI	10.1029/2018GL079273
通讯作者	Zhou, Hui(zhouhui@qdio.ac.cn)
英文摘要	This study investigates the interannual variations in the North Equatorial Counter Current (NECC) associated with the eastern Pacific and the central Pacific types of El Nino. Using observational analysis and ocean simulations, we show that the wind stress anomalies during the two El Nino types are of comparable amplitude but have different spatial structures, which results in significant and distinct variations in the NECC. The NECC shifts southward and intensifies during the developing phase of El Nino, but the variations are confined in the central eastern Pacific for the eastern Pacific type and the western central Pacific for the central Pacific type. These differences can be attributed to modulations in equatorial Kelvin wave and tropical Rossby wave propagation as well as Ekman pumping. Plain Language Summary The North Equatorial Counter Current (NECC) is an eastward flowing surface current that transports a significant amount of water from the warm pool in the western Pacific to the east. Variations in the NECC exert profound effects on the tropical Pacific climate and need to be better understood. This study conducts statistical analyses and ocean model experiments to show that different flavors of El Nino can displace the NECC location and alter its intensity in distinct ways. The cause and the physical mechanisms behind the distinct impacts are identified and verified using specific El Nino events of each flavor. The findings reported in this study contribute to advance our understanding of El Nino diversity and its impacts on the circulation and variability of the Pacific Ocean.
资助项目	NSFC[41421005] ; NSFC[41720104008] ; NSFC[41376032] ; NSFC[41876009] ; QNLM[2016ASKJ12]
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000448656800053
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/156394]
专题	海洋研究所_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, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Qingdao Collaborat Innovat Ctr Marine Sci & Techn, Ctr Ocean Mega Sci, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Tan, Shuwen,Zhou, Hui. The Observed Impacts of the Two Types of El Nino on the North Equatorial Countercurrent in the Pacific Ocean[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(19):10493-10500.
APA	Tan, Shuwen,&Zhou, Hui.(2018).The Observed Impacts of the Two Types of El Nino on the North Equatorial Countercurrent in the Pacific Ocean.GEOPHYSICAL RESEARCH LETTERS,45(19),10493-10500.
MLA	Tan, Shuwen,et al."The Observed Impacts of the Two Types of El Nino on the North Equatorial Countercurrent in the Pacific Ocean".GEOPHYSICAL RESEARCH LETTERS 45.19(2018):10493-10500.