一次东北冷涡过程暴雨及强对流天气分析  

Analysis of A Heavy Rain and Strong Convective Weather in Northeast Cold Vortex Process

作　　者：崔悦 王健博 Cui Yue(Liaoyuan Meteorological Bureau,Liaoyuan,Jilin 136200)

机构地区：[1]辽源市气象局,吉林辽源136200

出　　处：《农业灾害研究》2023年第3期117-119,共3页Journal of Agricultural Catastrophology

摘　　要：利用高空、地面等常规气象资料和多普勒雷达资料,对2022年6月4—7日影响吉林省辽源市的东北冷涡暴雨过程进行诊断,结果表明:此次冷涡降水主要发生在冷涡的发展与成熟阶段,类似于中间涡暴雨形势特征。冷涡降水具有日变化特征,午后极易发生强对流天气。暖锋的发展为短时强降水提供了初始扰动。干空气下摆侵入,增强不稳定层结,促使风雹天气发生。VIL值的跃增和减小与冰雹的出现和消散相对应。VIL高值不能说明大冰雹是否出现,还应与VIL高值维持时间相联系,维持时间越短,越不利于大冰雹的产生,这对冰雹直径的预报具有一定的指示意义。In this paper,the northeast cold vortex rainstorm process affecting Liaoyuan,Jilin Province on June 4-7,2022 was selected for diagnosis based on the conventional meteorological data such as upper air and ground and Doppler radar data.The results show that the cold vortex precipitation mainly occurs in the development and maturity stage of the cold vortex,similar to the characteristics of the middle vortex rainstorm situation.The cold vortex precipitation had daily variation characteristics,and strong convection weather was very easy to occur in the afternoon.The development of warm front provides initial disturbance for short-term heavy rainfall.The invasion of dry air at the bottom enhances the unstable stratification and promotes the occurrence of wind and hail weather.The jump and decrease of VIL correspond to the occurrence and dissipation of hail.The high value of VIL cannot indicate whether the big hail appears or not,but also should be related to the maintenance time of the high value of VIL.The shorter the maintenance time was,the worse the big hail will be,which has certain indicating significance for the prediction of hail diameter.

关 键 词：东北冷涡 暴雨 强对流 雷达回波 VIL值 

分 类 号：P458.121.1[天文地球—大气科学及气象学]