Impact of the Atlantic multidecadal oscillation on the Asian summer monsoon
Impact of the Atlantic multidecadal oscillation on the Asian summer monsoon
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DOI：
10.1029/2006gl027655
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发表时间：
2006-12-20
影响因子：
5.2
通讯作者：
Ding, Hui
中科院分区：
文献类型：
--
作者：
Lu, Riyu;Dong, Buwen;Ding, Hui
通过将大西洋多年代际涛动（AMO）相关的海温异常作为边界强迫施加于大西洋，并允许大西洋以外的大气-海洋相互作用，利用大气-海洋耦合的全球环流模式研究了大西洋多年代际涛动（AMO）对亚洲夏季风的影响。以北大西洋异常偏暖、南大西洋异常偏冷为特征的正AMO期，导致东南亚和东亚夏季风偏强，印度夏季风晚退。这些季风变化主要是通过西太平洋和印度洋的大气-海洋耦合反馈以及欧亚大陆对流层温度变化对大西洋强加强迫的响应。结果与观测到的与AMO相对应的中国气候变化基本一致。它们提出了亚洲夏季风变率的非局地机制，并为理解其在20世纪的年代际变化提供了另一种观点。
The impact of the Atlantic Multidecadal Oscillation (AMO) on the Asian summer monsoon is investigated using a coupled atmosphere-ocean global general circulation model by imposing the AMO-associated sea surface temperature anomalies in the Atlantic as boundary forcing, and allowing atmosphere-ocean interactions outside the Atlantic. The positive AMO phase, characterized by anomalous warm North Atlantic and cold South Atlantic, leads to strong Southeast and east Asian summer monsoons, and late withdrawal of the Indian summer monsoon. These changes of monsoons are mainly through coupled atmosphere-ocean feedbacks in the western Pacific and Indian Oceans and tropospheric temperature changes over Eurasia in response to the imposed forcing in the Atlantic. The results are in agreement with the observed climate changes in China corresponded to the AMO phases. They suggest a non-local mechanism for the Asian summer monsoon variability and provide an alternative view to understanding its interdecadal variation during the twentieth century.