Subsurface temperature anomalies in the North Pacific Ocean associated with the ENSO cycle

IOCAS-IR

	Subsurface temperature anomalies in the North Pacific Ocean associated with the ENSO cycle
	Chen YL(陈永利); Zhao YP(赵永平); Wang F(王凡); Hao JJ(郝佳佳); Feng JQ(冯俊乔)
发表期刊	Chinese Journal of Oceanology and Limnology
ISSN	0254-4059
	2010-11-15
出版年	2010
卷号	v.28 期号:06 页码:180-191
文献类型	CNKI期刊论文
摘要	Multi-year Simple Ocean Data Assimilation(SODA) and National Centers for Environmental Prediction(NCEP) datasets were used to investigate the leading patterns of subsurface ocean temperature anomalies(SOTA) and the corresponding atmospheric circulation structure in the Pacific Ocean(20°S-60°N).In this paper,the evolution of North Pacific SOTA associated with El Nio-southern oscillation(ENSO),and their relationship with the overlying zonal/meridional atmospheric circulations were elucidated.The results indicate that:(1) there are two dominant modes for the interannual variability of the North Pacific SOTA.The primary mode is the dipole pattern of the central and western North Pacific SOTA associated with the leading mode of ENSO,and the second mode is the zonal pattern related to the second mode of ENSO.These two modes consist of the temporal-spatial variation of the SOTA in the North Pacific.(2) During the developing phase of the El Nio event,positive(negative) SOTA appears in the western(central) portion of the North Pacific Ocean.During the mature and decaying phase of the El Nio event,the western positive center and the central negative center continue to be maintained and enhanced.Meanwhile,the position of the western positive center slightly changes,and the central negative center moves eastward slowly.After the El Nio event vanishes,the positive SOTA disappears,and the central negative SOTA becomes weak and remains in the northeastern Pacific Ocean.The results for La Nia are generally the opposite.(3) During the El Nio/La Nia cycle,formation and evolution of the SOTA,with opposite signs in central and western North Pacific Ocean,resulted from vertical movement of the two northern branches of the Hadley Cell with opposite direction,as well as the positive feedback of the air-sea interaction induced by dynamic processes in the mid-latitudes.The former gives rise to the initial SOTA,and the latter intensifies SOTA.Under the forcing of these two processes,SOTA evolution is formed and sustained during the El Nio/La Nia events.Also discussed herein as background for the ENSO cycle are the possible connections among the West Pacific subtropical high,the strength of the Kuroshio near the East China Sea,the Kuroshio meanders south of Japan,the Aleutian Low,and cold advection in the central North Pacific Ocean.
关键词	ENSO cycle North Pacific subsurface ocean temperature anomalies Hadley Cell
CNKI专辑号	A;
CNKI专辑名称	基础科学;
CNKI专题号	A009;A010;
CNKI专题名称	气象学;海洋学;
分类号	P732
收录类别	中科院核心
语种	英文;
资助项目(基金）	Supported by the Knowledge Innovation Program of Chinese Academy of Sciences (No. KZCX2-YW-Q11-02) ; the National Basic Research Program of China (973 Program) (Nos. 2007CB411802 and 2006CB403601)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/191884
专题	中国科学院海洋研究所
作者单位	1.InstituteofOceanology,ChineseAcademyofSciences 2.KeyLaboratoryofOceanCirculationandWaveStudies,ChineseAcademyofSciences 3.YantaiInstituteofCostalZoneResearch,ChineseAcademyofSciences
推荐引用方式 GB/T 7714	Chen YL,Zhao YP,Wang F,et al. Subsurface temperature anomalies in the North Pacific Ocean associated with the ENSO cycle. 2010.