The study on the relations between moisture flux in east asia and the south china sea summer monsoon

Funds: 

the National Climbing Programme under the Ministry of Science and Technology of China;the South China Sea Monsoon Experiment (SCSMEX);the National Natural Science Foundation of China under Project No.40075003

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  • We analyze the pentad average moisture flux (qv) and the monsoon intensity and get some results:strengthening periods of monsoon are all accompanied by increasing of moisture flux and extending to the high level, and moving of moisture flux convergence from west to east in the bottom layer.There are two high value centers in South China Sea (SCS) and the Yangtze River Basin.In the last dekad of July, the high moisture flux centers in SCS alternates with the Yangtze River Basin, and it is the time for moving of rain band to the north.In the years of strong monsoon, the moisture flux anomalies are positive from Indian Ocean to SCS, and the others are negative from north of SCS to Yangtze River and the southeast of North China.The convergence area of moisture vector is in easterly.In the years of weak monsoon, the anomaly distribution is opposite to the years of strong monsoon.
  • Gao Shaofeng, Zhou Meien and Feng Zhiqiang (1988). The variation of the atmospheric structure and energetic budget over the southern China before and after the onset of summer monsoons, J. Tropical Meteor., 4:107-115 (in Chinese).
    Huang Ronghui. Zhang Zhenzhou and Huang Gang (1998), Characteristics of the water vapor transport in East Asian monsoon region and its difference from that in South Asian monsoon region in summer. Scientia Atmospherica Sinica. 22:460-469 (in Chinese).
    Xu Shuying (1958), Water-vapour transfer and water balance over the eastern China,Acta Meteor. Sinica, 29:33-43 (in Chinese).
    Zhang Xiuzhi, Li Jianglong, Ding Yihui and Yan Junyue (2001). A study of circulation characteristics and index of South China Sea summer monsoon, Acta Meteor. Sinica, 15:450-464.

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