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

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.