The Multiplication Generated by Dendritic Snow Crystals Collision and Aggregation

The measurement during a case of snow precipitation on 11. Nov. 1982 in Xinjiang Uygur Autonomous Region in China was made on an aircraft equipped with PMS. It showed that the collision and aggregation of dendritic snow crystals led to the formation of snowflakes and the multiplication of ice crystals. As the results of the formation of snowflakes, the concentration of snow crystals (d>3000μm) markedly increased while the concentration of snow crystals (400<7<3000μm) decreased in like manner. At the same time, in the region where the multiplication of ice crystals generated, the concentration of ice crystals (18≤d<340μm) increased by about 35%, and the concentration of snow crystals (340≤d<6100μm) increased by about 10%