榆树市冰雹灾害天气过程分析  

Analysis of Hail Disaster Weather Process in Yushu City

作　　者：隋丹 兰慧婷 孟祥祎 SUI Dan(Yushu Meteorological Bureau,Yushu,Jilin 130400)

机构地区：[1]榆树市气象局,吉林榆树130400

出　　处：《农业灾害研究》2021年第7期59-60,共2页Journal of Agricultural Catastrophology

摘　　要：冰雹是榆树市主要灾害性天气之一,多发生于每年的4—9月。2019年6月5日榆树市出现冰雹强对流天气,农作物受灾严重。通过分析得出:此次降雹天气出现在"两槽一脊"大环流背景下,强对流天气出现前的对应天气指数都有明显变化,大气层正趋于不稳定状态,比湿、水汽通量和散度充分说明冰雹天气过程发展演变和水汽来源通道,雷达回波反映了长钉结构和强回波区附近呈穹窿状,为临近预警提供重要参考。Hail is one of the main disastrous weather in Yushu City, mostly from April to September every year. On June 5, 2019, there was hail severe convective weather in Yushu City, and the crops were seriously affected.Through analysis, it is concluded that the hail weather occurred under the background of two troughs and one ridge circulation,the corresponding weather indexes changed significantly before the occurrence of severe convective weather, and the atmosphere is becoming unstable. The specific humidity,water vapor flux and divergence fully explain the development and evolution of hail weather process and the source channel of water vapor, The radar echo reflects the long nail structure and the dome shape near the strong echo area, which is an important reference for improving the proximity early warning.

关 键 词：灾害市 冰雹天气 过程分析 

分 类 号：P458.121.2[天文地球—大气科学及气象学]