河北廊坊一次强对流暴雨过程分析  

Analysis of a Severe Convective Rainstorm in Langfang, Hebei Province

作　　者：李娜 刘艳杰 许敏 

机构地区：[1]廊坊市气象局,河北廊坊

出　　处：《地球科学前沿（汉斯）》2019年第9期779-789,共11页Advances in Geosciences

基　　金：廊坊市气象局项目“强对流预报预警创新团队”,廊坊市科技局项目(2019013073)。

摘　　要：利用micaps、自动站、多普勒雷达、卫星等资料对2017年5月17日廊坊地区一次强对流暴雨天气过程进行分析。结果表明:该次过程是一次非典型环流形势下的午后垂直热对流,地面辐合线和阵风锋是该次过程的触发机制,925 hPa θse能量锋区是本次强对流系统发生发展的重要强迫因子,边界层东南风急流为对流发展提供了充足的水汽输送,低层气旋性辐合、逆风区有利于风暴的维持和加强。With the data of micaps,automatic station,Doppler radar and satellite,a severe convective rainstorm on May 17,2019 in Langfang was analyzed.The results show that:the process is an afternoon-vertical thermal convection in atypical circulation situation;the surface convergence line and gust front are the triggering mechanism of the process;the 925 hPa thetase energy front is an important forcing factor for the occurrence and development of the convection system;the southeasterly boundary-layer jet provides sufficient water vapor for the development of convection.The low-level cyclonic convergence and adverse wind area are beneficial to the maintenance and strengthening of the storm.

关 键 词：强对流暴雨 辐合线 θse能量锋区 逆风区 

分 类 号：P4[天文地球—大气科学及气象学]