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Variability of the western Pacific warm pool structure associated with El Nino
Hu, Shijian1,2,3,4; Hu, Dunxin1,2,3; Guan, Cong1,2,4; Xing, Nan5; Li, Jianping5; Feng, Junqiao1,2,3
2017-10-01
发表期刊CLIMATE DYNAMICS
卷号49期号:7-8页码:2431-2449
文章类型Article
摘要Sea surface temperature (SST) structure inside the western Pacific warm pool (WPWP) is usually overlooked because of its distinct homogeneity, but in fact it possesses a clear meridional high-low-high pattern. Here we show that the SST low in the WPWP is significantly intensified in July-October of El Nino years (especially extreme El Nino years) and splits the 28.5 A degrees C-isotherm-defined WPWP (WPWP split for simplification). Composite analysis and heat budget analysis indicate that the enhanced upwelling due to positive wind stress curl anomaly and western propagating upwelling Rossby waves account for the WPWP split. Zonal advection at the eastern edge of split region plays a secondary role in the formation of the WPWP split. Composite analysis and results from a Matsuno-Gill model with an asymmetric cooling forcing imply that the WPWP split seems to give rise to significant anomalous westerly winds and intensify the following El Nino event. Lead-lag correlation shows that the WPWP split slightly leads the Nino 3.4 index.
关键词Western Pacific Warm Pool Sst Structure Wpwp Split El Nino
DOI10.1007/s00382-016-3459-y
收录类别SCI
语种英语
WOS记录号WOS:000410803300012
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被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/143173
专题海洋环流与波动重点实验室
作者单位1.Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Key Lab Ocean Circulat & Wave, Qingdao, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Ocean & Climate Dynam, Qingdao, Peoples R China
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing, Peoples R China
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Hu, Shijian,Hu, Dunxin,Guan, Cong,et al. Variability of the western Pacific warm pool structure associated with El Nino[J]. CLIMATE DYNAMICS,2017,49(7-8):2431-2449.
APA Hu, Shijian,Hu, Dunxin,Guan, Cong,Xing, Nan,Li, Jianping,&Feng, Junqiao.(2017).Variability of the western Pacific warm pool structure associated with El Nino.CLIMATE DYNAMICS,49(7-8),2431-2449.
MLA Hu, Shijian,et al."Variability of the western Pacific warm pool structure associated with El Nino".CLIMATE DYNAMICS 49.7-8(2017):2431-2449.
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