Numerical Study on Mechanism of Artificial Modification of Cumulonimbus Clouds

A series of numerical experiments have been done to test the seeding effect of artificial icecristals or raindrop embryos using a one-dimentional time dependent cumulonimbus cloud model. Some effects of precipitation enhancement or hail reduction are achieved by seeding in different cases. Analysis results show that the artificial modification can change the leading microphysical process of precipitation element formation.