保定两次暴雨对比诊断分析  

Comparative Diagnostic Analysis of Two Rainstorms in Baoding

作　　者：徐义国[1] 高万泉[1] 马鸿青[1] 王志超[1] XU Yi-guo(Baoding Meteorological Bureau,Baoding,Hebei 071000)

机构地区：[1]保定市气象局,河北保定071000

出　　处：《农业灾害研究》2021年第5期61-63,共3页Journal of Agricultural Catastrophology

摘　　要：利用国家自动站观测资料、NCEP1°×1°资料、以及加密观测数据,对2019年7月22日和29日的保定暴雨进行诊断分析。结果表明:(1)两次过程都是受到高空槽、切变线以及副热带高压共同作用产生的暴雨天气过程。(2)22日过程的副高位置整体偏南,阻挡作用不如29日过程明显,因而在降水的持续时间方面较弱。(3)29日过程的副高外围的西南急流较强盛,因而水汽、热力条件都要更好,降水更剧烈。(4)两次过程地面风场辐合的地方降水较强,地面辐合触发强对流天气,同时加强对流的发展;29日过程的偏南风力强劲,与偏北风的辐合较强,触发的强对流天气更加剧烈。Based on the observation data of national automatic weather station and NCEP1°×1°.The Baoding Rainstorm on July 22nd and 29th,2019 is diagnosed and analyzed by using the data of the meteorological data and intensive observation data.The results show that:(1)The two processes are caused by the high trough,shear line and subtropical high.(2)The position of the subtropical high on the 22nd day is South as a whole,and the blocking effect is not as obvious as that on the 29th day,so the duration of precipitation is worse.(3)The southwest jet around the subtropical high during the 29th day is stronger,so the water vapor and thermal conditions are better,and the precipitation is more severe.(4)The precipitation is stronger in the convergence area of the two processes,which triggers the severe convective weather and strengthens the development of convection.However,the southerly wind in the 29th process is stronger than the northerly wind,so the severe convective weather is more severe.

关 键 词：保定 暴雨 对比 辐合线 

分 类 号：P45[天文地球—大气科学及气象学]