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| Teleconnection between Winter Arctic Oscillation and Southeast Asian Summer Monsoon in the Pre-Industry Simulation of a Coupled Climate Model |
| CUI Xue-Dong1,2, GAO Yong-Qi1,3, GONG Dao-Yi4, GUO Dong5, Tore FUREVIK6 |
1Nansen-Zhu International Research Centre, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China
2University of Chinese Academy of Sciences, Beijing 100049, China
3Nansen Environmental and Remote Sensing Center, Bergen, Norway
4State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China
5Climate Change Research Center, Chinese Academy of Sciences, Beijing 100029, China
6Geophysical Institute, University of Bergen, Bergen Norway |
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Abstract 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 timescale. The results indicate an in-phase relationship between the AO and SEASM with periods of approximately 16-32 and 60-80 years. During the positive phase of winter AO, an anomalous surface anti-cyclonic atmosphere circulation appears over North Pacific in winter. The 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) pattern. The 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.
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Received: 05 January 2013
Revised: 05 February 2013
Accepted: 16 February 2013
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Corresponding Author:
GAO Yong-Qi
E-mail: gyq@mail.iap.ac.cn
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