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气象:2005,31(4):13-17
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一次强冰雹过程的物理机制分析
(1.南京气象学院大气科学系,210044;2.河南省郑州市气象局)
Physical Mechanism Analysis of a Heavy Hail Event
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中文摘要: 从冰雹形成所需具备的三个条件入手,详细分析了2002年7月19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-20℃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。
Abstract: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.
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引用文本:
张霞,周建群,申永辰,李荣,白宇,王君,2005.一次强冰雹过程的物理机制分析[J].气象,31(4):13-17.
,2005.Physical Mechanism Analysis of a Heavy Hail Event[J].Meteor Mon,31(4):13-17.