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Variation in joint mode of the tropical Indian-Pacific Ocean thermodynamic anomaly

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文摘 Previous research has defined the index of the Indian-Pacific thermodynamic anomaly joint mode (IPTAJM) and suggested that the winter IPTAJM has an important impact on summer rainfall over China. However, the possible causes for the interannual and decadal variability of the IPTAJM are still unclear. Therefore, this work investigates zonal displacements of both the western Pacific warm pool (WPWP) and the eastern Indian Ocean warm pool (EIOWP). The relationships between the WPWP and the EIOWP and the IPTAJM are each examined, and then the impacts of the zonal wind anomalies over the equatorial Pacific and Indian Oceans on the IPTAJM are studied. The WPWP eastern edge anomaly displays significant interannual and decadal variability and experienced a regime shift in about 1976 and 1998, whereas the EIOWP western edge exhibits only distinct interannual variability. The decadal variability of the IPTAJM may be mainly caused by both the zonal migration of the WPWP and the 850 hPa zonal wind anomaly over the central equatorial Pacific. On the other hand, the zonal migrations of both the WPWP and the EIOWP and the zonal wind anomalies over the central equatorial Pacific and the eastern equatorial Indian Ocean may be all responsible for the interannual variability of the IPTAJM.
来源 Chinese Journal of Oceanology and Limnology ,2010,28(3):619-625 【核心库】
关键词 tropical Indian Ocean ; tropical Pacific ; thermodynamic anomaly joint mode ; ENSO ; dipole
地址

1. Institute of Oceanology, Chinese Academy of Sciences, Key Laboratory of Ocean Circulation and Wave, Chinese Academy of Sciences, Beijing, 100039  

2. Institute of Oceanology, Chinese Academy of Sciences, Key Laboratory of Ocean Circulation and Wave, CAS, Qingdao, 266071

语种 英文
文献类型 研究性论文
ISSN 0254-4059
学科 海洋学
基金 国家973计划 ;  The Knowledge Innovation Program of Chinese Adademy of Sciences ;  Special Project for Marine Public Walfare Industry
文献收藏号 CSCD:3891797

参考文献 共 31 共2页

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