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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
Source PublicationCLIMATE DYNAMICS
Volume49Issue:7-8Pages:2431-2449
SubtypeArticle
AbstractSea 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.
KeywordWestern Pacific Warm Pool Sst Structure Wpwp Split El Nino
DOI10.1007/s00382-016-3459-y
Indexed BySCI
Language英语
WOS IDWOS:000410803300012
Citation statistics
Document Type期刊论文
Version出版稿
Identifierhttp://ir.qdio.ac.cn/handle/337002/143173
Collection海洋环流与波动重点实验室
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences;  Key Laboratory of Ocean Circulation and Wave Studies, Institute of Oceanology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
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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