The result indicates: initial CCN has great influence on convectional precipitation.
模拟结果表明：初始ccn对对流性降水影响较大。
2
Therefore, the central difference to deal with both the convectional and the diffusion term was adopted.
针对反向计算的如上特点，我们对对流项和扩散项均采取了中心差分的处理方式。
3
The analysis of the virtual echo such as three -body scatter spike echo, the secondary echo, the side -lobe echo is given echo based on observational re cords of severe convectional weather in 2003.