2021年4月崇仁一次暴雨过程分析

Analysis of a rainstorm process in Chongren in April 2021

基于2021-04-24-2021-04-25崇仁一次暴雨过程,利用常规气象资料、地面观测数据、FY-2G云顶亮温数据及NCEP 1°×1°再分析数据,结合物理量的诊断技术,对此次暴雨的环流形势、水汽条件、动力条件、热力条件及中尺度系统进行了深入的探究。研究表明:两槽一脊大尺度环流的存在大大促进了暴雨的形成;西南急流的形成使得大量水汽持续向暴雨地带传递;大气强烈的不稳定性及垂直上升运动为暴雨过程提供了热力条件和动力条件。研究结果为短时临近天气的预报预警工作提供参考。

Based on a rainstorm process in Chongren from April 24 to 25,2021,using conventional meteorological data,ground observation data,FY-2G cloud top brightness temperature data and NCEP 1°×1°reanalysis data,and combined with the diagnosis technology of physical quantities,the circulation situation,water vapor conditons,dynamic conditions,thermal conditons and mesoscale system of the rainstorm were deeply explored.The results show that the existence of large scale circulation in two troughs and one ridge greatly promotes the formation of rainstorm.The formation of the southwest jet stream makes a large amount of water vapor continue to transfer to the rainstorm zone.The strong instability of the atmosphere and the vertical upward movement provide thermodynamic and dynamic conditions for the rainstorm process.The research results provide reference for short term weather forecasting and early warning work.