摘要
从冰雹形成所需具备的三个条件入手,详细分析了2 0 0 2年7月1 9日出现在郑州地区的强冰雹过程。结果表明:水汽条件、不稳定层结、外部抬升力等条件同时满足,易导致强对流性天气的产生;适宜的0℃层和- 2 0℃层高度及大的环境风垂直切变有利于雹粒的增长;低空水平螺旋度和差动位温平流与此次强雹落区有较好的对应关系。
Based on the three conditions of formed-hail, a heavy hail event in Zhengzhou area on 19 July 2002 is analysed.The results show that the severe convection weather occurs easily when the water vapor and instability and the outer rising force are all suitable. The severe vertical wind shear and an appropriate height about 0℃ layer and -20℃ layer will be advantageous to the hail augmentation, and the low-level horizontal helicity and potential temperature difference are correlation with the hail area.
出处
《气象》
CSCD
北大核心
2005年第4期13-17,共5页
Meteorological Monthly
