Simulating Study on Hail Microphysical Process on the Northeastern Side of Qinghai-Xizang Plateau and Its Neighbourhood

As a study backgroundof the shear wave moving eastward inducing hailstorm frequently on the northeastern border of Qinghai-Xizang Plateau and its neighbourhood, the formation and growth of hail storm are simulated by using a 3D cloud model with hail-bin microphysics developed by Institute of Atmospheric Physics, Chinese Academy of Sciences and the large scale circulationinformation obtained from MM5V3 model. The results show that 1 the model can reappear hail, gale and rain storm events as real; 2 meso-scale humid and dynamicalbeing an important factors determine the hailstorm intensity and hails size; 3 the microphysical processes during the formation and growth of hail determine the hail cloud disappearance, the latent heat discharging over ground postpones hail shooting; 4the region of formation and growth of hail in hail cloud is in agreementwith the intersection of upwards air flow and downwards air flow, where is the main region to put hail embryo for hail supression.