摘要
To study the long-term variation of the East Asian summer monsoon(EASM),the Asian-Pacific Oscillation index(IAPO),representing a zonal thermal contrast between Asia and the North Pacific,is recon-structed over the past millennium.During the Little Ice Age(LIA),the variability of the reconstructed IAPO is closely linked to dry-wet anomalies in eastern China on the centennial scale.This correlation pattern is consistent with the observation during the current period,which suggests that the reconstructed IAPO may generally represent the centennialscale variation of the EASM and rainfall anomalies over eastern China during the LIA.
To study the long-term variation of the East Asian summer monsoon （EASM）, the Asian-Pacific Oscillation index （IAPO）, representing a zonal thermal contrast between Asia and the North Pacific, is reconstructed over the past millennium. During the Little Ice Age （LIA）, the variability of the reconstructed IAPO is closely linked to dry-wet anomalies in eastern China on the centennial scale. This correlation pattern is consistent with the observation during the current period, which suggests that the reconstructed IAPO may generally represent the centennial-scale variation of the EASM and rainfall anomalies over eastern China during the LIA.
基金
Supported by the National Natural Science Foundation of China (Grant Nos. 40890052 and 40890053)
National Basic Research Program of China (Grant No. 2007CB815901)
