2009年阜新市两次冰雹天气过程多普勒天气雷达产品的对比分析  

Comparative Analysis of Two Hail Processes Based on Doppler Weather Radar Products in Fuxin City in 2009

作　　者：张丹梅 ZHANG Dan-mei(Fuxin Meteorological Bureau,Fuxin 123000,Liaoning,China)

机构地区：[1]辽宁省阜新市气象局,辽宁阜新123000

出　　处：《湖北农业科学》2018年第7期48-53,共6页Hubei Agricultural Sciences

基　　金：辽宁省气象局科研开发项目(201311)

摘　　要：冰雹等强对流天气是辽宁省阜新市夏季预报和服务的重点,针对2009年发生在阜新市的两次强冰雹天气,利用常规气象资料和多普勒天气雷达资料进行对比分析。结果表明,两次过程都具有突发性强、持续时间长的特点,高低空急流配置、能量、风的垂直切变和0℃层等环境场条件更有利于冰雹的形成。通过雷达产品对比发现,6月29日是一次飑线过程,7月20日是一次超级单体过程,产生冰雹的风暴回波强度都达到了50 d Bz以上,最强达65 d Bz,径向速度图出现逆风区,成熟的低层和中层辐合、高层辐散的对流结构特征,垂直液态水含量在降雹前都有一个跃增的过程,其值大于40 kg/m2,对冰雹的监测预警和临近预报具有指示意义。It is crucial to well forecast severe convective weather like hail and provide better service during summer in Fuxin city,Liaoning province.Two severe hailstorms in Fuxin were compared by using conventional observation datas and doppler radar datas.The result showed that they occurred abruply,lasted longly.And the coupled upper and lower jet flows,energy condition,the vertical wind shear and the height of zero temperature conduced more to the occurrence of the hail event.The results of comparation by using doppler radar data showed that,the process on June,29th was a strong squall line process,while the process on July,20th was a typical supper-cell process.Two hail process which storm reflectivity was larger than 50 dbz,while the largest was 65 dbz,and there were an adverse wind area,as well as lower level convergence and upper level divergence.The vertically integrated liquid(VIL)value before the hail falling all had a sudden process,and the value was larger than 40 kg/m2,which had a significant indicating function on hails of monitoting and waring as well as forcassting.

关 键 词：冰雹 急流 多普勒天气雷达 超级单体 飑线 阜新市 

分 类 号：P458.121.2[天文地球—大气科学及气象学]