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LATION OF HEAVY RAINFALL IN THE SUMMER OF 1998 OVER CHINA WITH REGIONAL CLIMATE MODEL |
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Source: |
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LIU Yiming（刘一鸣） and DING Yihui （丁一汇）
National Satellite Meteorological Center, Beijing 100081
Received March 15, 2002; revised May 20, 2002
ABSTRACT
The heavy rainfall in the summer of 1998 over China has been simulated with the NCC Regional Climate Model (RegCMNCC). It was successful for RegCMNCC to reproduce the location and seasonal shift of the seasonal rain belt in the summer of 1998 over China. The rainy season in the summer of 1998 over China can be divided into 7 episodes, including the presummer rainy season in South China, the Meiyu onset over the YangtzeHuaihe River Basin, short appearance of North China rain season and the retreat of seasonal rain belt, the second Meiyu season over the Yangtze River Valley, the rainy period over the Yellow and Huaihe River Valley and the seasonal retreat of rain belt over North China. The shortcoming of the RegCMNCC is overestimation of precipitation amounts. The regions with large latent heat flux, upper soil moisture and total runoff are located in the rainy area and move with the simulated rain belt during the different episodes. On the contrary, the regions with small sensible heat flux are located in the simulated rainy area and move with the simulated rain belt during the different episodes.
Key words: heavy rainfall, regional climate model, Meiyu |
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