2021年7月12—13日赤峰暴雨的成因分析  

Analysis on the Cause of Heavy Rain in Chifeng on July 12-13,2021

作　　者：郭兆东 Guo Zhao-dong(Chifeng Meteorological Station,Chifeng,Inner Mongolia 024000)

机构地区：[1]赤峰市气象台,内蒙古赤峰024000

出　　处：《农业灾害研究》2023年第2期145-147,共3页Journal of Agricultural Catastrophology

摘　　要：采用ECWMF再分析资料对2021年7月12—13日发生在赤峰地区的暴雨过程进行诊断分析。结果表明:本次过程是受到切断形成的高空冷涡、冷涡前部的地面形成气旋共同影响造成的;暴雨的水汽通道是副高西侧和北侧强盛的偏南急流所带来的南海上的水汽;前期的晴朗高温天气,配合急流所输送的水汽,使得赤峰地区低层处于高温高湿环境,造成了“上冷下暖”的不稳定形势;赤峰地区处于500 hPa正涡度平流控制区;湿Q矢量及其散度作为垂直运动判据时较为清晰。Used ECWMF reanalysis data to diagnose and analyze the heavy rain process occurred in chifeng area from july 12 to 13,2021.The results showed that this process was caused by the combined influence of the high altitude cold vortex formed by cutting off and the ground cyclone formed in front of the cold vortex.The water vapor channel of the rainstorm was the water vapor on the South China Sea brought by the strong southerly jet on the west and north sides of the subtropical high.The early sunny and high temperature weather,combined with the water vapor transported by the jet stream,made the lower layer of Chifeng area in a high temperature and high humidity environment,resulting in an unstable situation of“cold up and warm down”.Chifeng area was in the control area of 500 hPa positive vorticity advection.The wet Q vector and its divergence were clear when used as the criterion of vertical motion.

关 键 词：暴雨 环流形势 水汽来源 不稳定性 Q矢量 

分 类 号：P458.121.1[天文地球—大气科学及气象学]