西昌一次降雹过程的数值模拟研究  

Numerical simulation study on a hail event in Xichang

作　　者：郑飒飒 刘建西[1] 刘晓璐[1] 马超 

机构地区：[1]四川省人工影响天气办公室,成都610072 [2]高原与盆地暴雨旱涝灾害四川省重点实验室,成都610072

出　　处：《暴雨灾害》2017年第5期475-481,共7页Torrential Rain and Disasters

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);中国气象局公益性行业(气象)科研专项"南方大范围云系人工增雨潜力探测研究"(GYHY201406032)

摘　　要：利用三维冰雹云模式,对2013年4月29日四川西昌的一次降雹过程进行了数值模拟。模拟结果显示:该例冰雹云存在过冷雨水累积带;霰是冰雹的主要胚胎,雹块主要通过撞冻云水增长,其次是撞冻霰增长;模拟区域内液态降水量和固态降水量分别占地面总降水量的52%和48%,冰雹占固态降水94%;通过对该例雹云中冰晶、雪、霰、冻滴的微物理过程分析发现,在雹云发展的不同阶段,冰雹的形成机制不同。A three-dimensional hailstorm numerical model is used to simulate and analyze a hailstorm in Xichang on 29 April 2013. The simulated results show that the cases of Hailstorm had an accumulation zone of supercooled raindrops. Graupel is the main hail embryo, and hails grow mainly through the process of hail hitting the freezing cloud water, followed by hitting freezing graupels. Solid and liquid precipitation accounted for 48% and 52% of the total precipitation,respectively. However, hail accounted for 94% of solid precipitation. Based on the analysis of the microphysical processes involving cloud ice, snow, graupel and frozen drops, it can be seen that during different stages of the development of hail clouds, hail formation mechanism is different.

关 键 词：西昌冰雹云 冰雹云模式 数值模拟 降雹机制 

分 类 号：P458.121.2[天文地球—大气科学及气象学]