摘要：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.
关键词：Southeast Asian summer monsoon; Arctic Oscillation; Pacific Decadal Oscillation; inter-decadal timescale; sea surface temperature
