摘要
应用常规天气资料、自动站和强天气监测数据、WebGIS雷达回波拼图等资料,采用统计对比分析和特征提取方法,对2017年5月11日江西强飑线天气过程进行分析,结果表明:"511"强飑线过程是由500 h Pa高空小槽引导、低空切变和低空急流等多因素共同作用下产生的。江西飑线回波系统多数是由省外产生且有规律移入的带状回波系统,具有4个不同阶段的回波特征。超级单体风暴常伴有雷雨大风、短时强降水、冰雹等强对流天气,往往发生在飑线回波带的前方暖区中。弓形回波带由一个个对流回波核组成,回波长度往往超过100 km。雷雨大风发生在弓形回波的前沿,而最强的雷雨大风发生在弓形回波的顶部"逗点"头部,也就是回波移速较快向前突出的部位。
Using the application of conventional weather data, automatic stations and weather monitoring data, WebGIS Radar Mosaic data, statistical analysis and feature extraction methods, to analysisthe strong squall line on May 11, 2017 in Jiangxi, the results show that the “ 511”squall line processis to produce many factors, guided by 500 hPa high altitude small groove shear and lowlevel jet under. Most of Jiangxi squall line echo system is a zonal echo system which is produced by foreign provinces and moves regularly. It has four echo characteristics at different stages. Super single bodystorms are often accompanied by thunderstorms, shorttime heavy rainfall, hail and other severe convective weather, which often occur in the warm zone ahead of the squall line echo zone. The bow echo zone consists of a pair of convective echo cores, and the echo length is often over 100 km. Thunderstorms occur in front of the bow echo, and the strongest thunderstorms occur in the bow echo, in otherwords the part of the head, the comma echo move faster speed forward.
出处
《江西科学》
2018年第1期106-111,共6页
Jiangxi Science
基金
江西省气象局2017年科研项目"赣东北致洪大暴雨的分析与研究"
关键词
强飑线
短时强降水
超级单体回波
弓形回波
strong squall line
shorttime heavy rainfall
super single body echo
bow echo
作者简介
张萍（1985-）,女,本科,助理工程师,从事气象预报预测工作
