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枝状雪晶碰撞攀附与折裂繁生
The Multiplication Generated by Dendritic Snow Crystals Collision and Aggregation
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摘要: 用机载粒子测量系统（PMS）对新疆冬季一次系统降雪进行了探测。结果表明：枝状雪晶间碰撞攀附形成雪团，一方面使直径大于3300微米的雪晶数浓度明显增加，另一方面又使直径700—3300微米的雪晶数浓度明显减小，同时引起了枝状雪晶的折裂繁生，使冰晶（18≤D＜3400微米）数浓度平均增加35%，雪晶数浓度平均增加10%。Abstract: 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%
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