Distribution of the tropical Pacific surface zonal wind anomaly and its relation with two types of El Nino

doi:10.1007/s00343-013-2294-9

IOCAS-IR > 海洋环流与波动重点实验室

	Distribution of the tropical Pacific surface zonal wind anomaly and its relation with two types of El Nino
	Wang Yang1,2,3 ; Chen Jinnian 1,2; Wang Hongna 1,2; Chen, JN
	2013-09-01
发表期刊	CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	0254-4059
卷号	31 期号:5 页码:1137-1152
文章类型	Article
摘要	El Nino events with an eastern Pacific pattern (EP) and central Pacific pattern (CP) were first separated using rotated empirical orthogonal functions (REOF). Lead/lag regression and rotated singular value decomposition (RSVD) analyses were then carried out to study the relation between the surface zonal wind (SZW) anomalies and sea surface temperature (SST) anomalies in the tropical Pacific. A possible physical process for the CP El Nino was proposed. For the EP El Nino, strong westerly anomalies that spread eastward continuously produce an anomalous ocean zonal convergence zone (ZCZ) centered on about 165A degrees W. This SZW anomaly pattern favors poleward and eastward Sverdrup transport at the equator. For the CP El Nino, westerly anomalies and the ZCZ are mainly confined to the western Pacific, and easterly anomalies blow in the eastern Pacific. This SZW anomaly pattern restrains poleward and eastward Sverdrup transport at the equator; however, there is an eastward Sverdrup transport at about 5A degrees N, which favors the warming of the north-eastern tropical Pacific. It is found that the slowness of eastward propagation of subsurface warm water (partly from the downwelling caused by Ekman convergence and the ZCZ) is due to the slowdown of the undercurrent in the central basin, and vertical advection in the central Pacific may be important in the formation and disappearance of the CP El Nino.; El Nino events with an eastern Pacific pattern (EP) and central Pacific pattern (CP) were first separated using rotated empirical orthogonal functions (REOF). Lead/lag regression and rotated singular value decomposition (RSVD) analyses were then carried out to study the relation between the surface zonal wind (SZW) anomalies and sea surface temperature (SST) anomalies in the tropical Pacific. A possible physical process for the CP El Nino was proposed. For the EP El Nino, strong westerly anomalies that spread eastward continuously produce an anomalous ocean zonal convergence zone (ZCZ) centered on about 165A degrees W. This SZW anomaly pattern favors poleward and eastward Sverdrup transport at the equator. For the CP El Nino, westerly anomalies and the ZCZ are mainly confined to the western Pacific, and easterly anomalies blow in the eastern Pacific. This SZW anomaly pattern restrains poleward and eastward Sverdrup transport at the equator; however, there is an eastward Sverdrup transport at about 5A degrees N, which favors the warming of the north-eastern tropical Pacific. It is found that the slowness of eastward propagation of subsurface warm water (partly from the downwelling caused by Ekman convergence and the ZCZ) is due to the slowdown of the undercurrent in the central basin, and vertical advection in the central Pacific may be important in the formation and disappearance of the CP El Nino.
关键词	Surface Zonal Wind Anomaly Cp (Central Pacific) El Nino Rotated Empirical Orthogonal Function Rotated Singular Value Decomposition Zonal Convergence Physical Process
学科领域	Marine & Freshwater Biology ; Oceanography
DOI	10.1007/s00343-013-2294-9
URL	查看原文
收录类别	SCI
语种	英语
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Limnology ; Oceanography
WOS记录号	WOS:000324111300022
WOS关键词	SOUTHERN-OSCILLATION ; WESTERN PACIFIC ; OCEAN ; TEMPERATURE ; EQUATORIAL ; CLIMATE ; ENSO ; VARIABILITY ; MODEL
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
引用统计	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/337002/16401
专题	海洋环流与波动重点实验室
通讯作者	Chen, JN
作者单位	1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位	中国科学院海洋研究所; 海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Wang Yang,Chen Jinnian,Wang Hongna,et al. Distribution of the tropical Pacific surface zonal wind anomaly and its relation with two types of El Nino[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2013,31(5):1137-1152.
APA	Wang Yang,Chen Jinnian,Wang Hongna,&Chen, JN.(2013).Distribution of the tropical Pacific surface zonal wind anomaly and its relation with two types of El Nino.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,31(5),1137-1152.
MLA	Wang Yang,et al."Distribution of the tropical Pacific surface zonal wind anomaly and its relation with two types of El Nino".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 31.5(2013):1137-1152.

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