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大气科学  1999 

Mechanisms of the atmospheric Teleconnection Associated with the Activity of the Asian Summer Monsoon. Part II: Optimal Forcing and Atmospheric Responses
亚洲夏季风活动激发北半球大气遥相关的物理机制探讨 II.最优强迫模及其响应

Keywords: Asian summer monsoon,most optimal forcing mode,response,atmospheric teleconnection

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The external mechanism by which the activity of the Asian summer monsoon (ASM) develops the atmospheric teleconnection is investigated by using the methods of the complete orthonormal forcing mode. It is found that, during boreal summe the most optimal forcing modes are mainly centered over the ASM region, and exhibiting similar features to the anomalous OLR related to the activity of the ASM. Moreover, the atmospheric responses to the most optimal forcing bear much resemblance to the anomalous circulation patterns lagging behind the strong monsoon pentads. These results suggest that, as an optimal forcing, the thermal variation in the ASM region can lead to the atmospheric teleconnection over the Northern Hemisphere.


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