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Teleconnection between Winter Arctic Oscillation and southeast asian summer monsoon in the Pre-Industry Simulation of a Coupled Climate Model

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Atmospheric and Oceanic Science Letters 2013年第5期6卷 349-354页

作者： CUI Xue-Dong GAO Yong-Qi GONG Dao-Yi GUO Dong Tore FUREVIK Nansen-Zhu International Research Centre Institute of Atmospheric Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Nansen Environmental and Remote Sensing Center State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal University Climate Change Research Center Chinese Academy of Sciences Geophysical Institute University of Bergen

A 600-year pre-industrial simulation with Bergen Climate Model(BCM)Version 2 is used to investigate the linkage between winter Arctic Oscillation(AO)and the southeast asian summer monsoon(SEASM)on the inter-decadal *** results indicate an in-phase relationship between the AO and SEASM with periods of approximately 16–32 and 60–80 *** the positive phase of winter AO,an anomalous surface anti-cyclonic atmosphere circulation appears over North Pacific in *** corresponding anomalies in ocean circulation and surface heat flux,particularly the latent and sensible heat flux,resemble a negative Pacific Decadal Oscillation(PDO)-like sea surface temperature(SST)*** AO-associated PDO-like winter SST can persist into summer and can therefore lead to inter-decadal variability of summer monsoon rainfall in East and southeast Asia.

关键词： southeast asian summer monsoon Arctic Oscillation Pacific Decadal Oscillation inter-decadal timescale sea surface temperature

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Impact of El Nino on Large-scale Circulation of southeast asian summer monsoon

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Chinese Journal of Oceanology and Limnology 2003年第2期21卷 97-105页

作者：白学志吴爱明 Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

Multi-year SST and NCEP/NCAR reanalyzed wind data were employed to study the impacts of El Nio on the southeast asian summer monsoon (SEASM). It was found that the impacts of El Nio on the SEASM differed distinctly from those on the East asian summer monsoon (EASM) and the Indian summer monsoon (ISM). Composite analysis indicated that the "gear point" of coupling between the Indo-monsoon circulation and the Pacific-Walker circulation was located in the western margins of southeast Asia when the developing stage of El Nio events covered the boreal summer. The anomalous circulations in the lower and upper troposphere and divergent circulation are all favorable for the strengthening of the SEASM during this period. Following the evolution of El Nio, the "gear point" of the two cells shifted eastward to the central Pacific when the mature or decaying period of El Nio events covered the boreal summer. The anomalous circulations are favorable for the weakening of the SEASM. The anomalous indexes of intensity of SEASM accord well with the above results. Additionally, the difference of SSTA patterns in the tropical Indo-Pacific Ocean between the two stages of the El Nio may play an important role.

关键词： southeast asian summer monsoon El Nino southeast Asia

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