Abstract:

On the basis of sounding data at 11 stations from 1987 to 2006 in Chongqing and its surrounding area,the characteristics of the water vapor flux transport from various boundaries of Chongqing were analyzed. The results showed that the average net budget of water vapor flux in total layers over Chongqing was positive, and there was net water vapor inflow into Chongqing. The net budget of water vapor flux had the largest outflow in the layer between ground and 850hPa and the largest inflow in the layer between 700 and 500 hPa. There was inflow of net water vapor over Chongqing in summer and winter, while there was outflow of net water vapor over Chongqing in spring and autumn. The water vapor over Chongqing mainly came from the inflow of the western and the southern boundary and effused through the eastern and the northern boundary. The net water vapor flux over Chongqing decreased in spring and winter, but increased in summer and autumn in the past 20 years.〖