西昌一次降雹过程的催化数值模拟  

Numerical Simulation of a Hailstorm Process and Ag I-seeding in Xichang of Sichuan Province

作　　者：郑飒飒 刘东升[1,2] 邹勇 余芳[1,2] 

机构地区：[1]四川省人工影响天气办公室,四川成都610072 [2]高原与盆地暴雨旱涝灾害四川省重点实验室,四川成都610072 [3]四川省凉山州气象局,四川凉山彝族自治州615000

出　　处：《干旱气象》2017年第3期490-494,共5页Journal of Arid Meteorology

基　　金：四川省气象局科学技术研究开发课题(川气课题2014-开发-11);"南方大范围云系人工增雨潜力探测研究"(GYHY201406032)共同资助

摘　　要：利用三维冰雹云模式对2013年4月29日西昌一次降雹过程进行催化数值模拟,根据碘化银的催化时间、催化高度、催化用量和催化方式开展一系列防雹试验。结果表明:选择合适的催化时间、催化剂量、催化位置及催化方式,可以达到最佳防雹效果;通过对催化例和未催化例的冰雹形成机制对比分析得出,在播撒碘化银后,激发了"有利竞争",雹块不能长大;霰胚的减少及冰雹碰并云水的减少,导致降雹减少。Based on the three-dimensional hail cloud model,a hailstorm process occurring in Xichang of Sichuan Province on 29 April2013 was simulated. Several hail suppression tests with varied seeding time,seeding height,seeding amount and seeding method of Ag I were carried out. The results show that the optimum hail suppression effect could be achieved by selecting the appropriate seeding time,seeding amount,seeding position and area. Through the comparative analysis of hail formation mechanism of the seeding and natural cloud,it could be known that after seeding Ag I the hail couldn＇t grow because of ＂favorable competition＂,and reduction of the graupel embryo and hail hitting cloud water caused the reduction of hail.

关 键 词：人工防雹 AG I 催化试验 数值模拟 

分 类 号：P458.121.2[天文地球—大气科学及气象学]