黔东南州一次冰雹天气过程分析
Analysis of a Hail Weather Process in Qiandongnan Prefecture
DOI: 10.12677/CCRL.2021.105055, PDF,  被引量   
作者: 龙安华, 龙 源:贵州省黔东南州气象局,贵州 凯里
关键词: 冰雹VIL闪电回波顶高Hail VIL Lightning Echo Top Height
摘要: 本文利用常规气象观测资料和雷达资料,对2018年4月13日黔东南的一次冰雹天气过程进行分析,结果表明:本次天气过程高空槽位于我省北部,是在低层切变线和冷空气南下的共同影响下形成的;超过25℃的T850-500以及一定的K指数、CAPE值等物理量,配合适宜的0℃、−20℃高度形成了当天有利的降雹环境;降雹前30 min的闪电统计中,负闪占据明显优势,闪电频次在降雹前有“跃增”现象和峰值的出现;14个降雹点中有11个为两个单体风暴产生的,降雹前雷达回波顶高均大于12 km,强度在60 dBz以上;降雹前VIL最大值在35 kg/m2以上,且降雹前后的一段时间内呈先骤增后减小或维持一个较高VIL值的趋势,VIL值与冰雹大小之间没有较好的相关性。
Abstract: Using conventional meteorological observation data and radar data, this paper analyzes a hail weather process in Qiandongnan on April 13, 2018. The results show that the high trough of this process of weather is located in the north of our province and is formed under the joint influence of low-level shear line and cold air moving south; T850-500 above 25˚C and certain physical quantities such as K index and Cape value, combined with the appropriate height of 0˚C and −20˚C, formed a favorable hail environment on that day; in the statistics of lightning 30 minutes before hail, negative lightning occupies an obvious advantage, and the lightning frequency has a “jump” phenomenon and peak value before hail; 11 of the 14 hail spots are caused by two single storms. The top height of radar echo before hail is greater than 12 km and the intensity is more than 60 dbz; the maximum value of VIL before hail is more than 35 kg/m2, and there is a trend of first sudden increase and then decrease or maintain a higher VIL value in a period of time before and after hail. There is no good correlation between VIL value and hail size.
文章引用:龙安华, 龙源. 黔东南州一次冰雹天气过程分析[J]. 气候变化研究快报, 2021, 10(5): 474-483. https://doi.org/10.12677/CCRL.2021.105055

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