2021年11月临汾市一次超强寒潮天气过程分析

Diagnosis Analysis of a Super Cold Wave Weather Process in Linfenin November 2021

摘要: 利用常规气象观测资料和ERA5再分析资料，对2021年11月5~8日临汾市超强寒潮的环流形势进行了诊断分析，并对雨雪、大风天气的成因进行了分析。结果表明：此次寒潮过程环流形势为横槽转竖型，伴随着强的冷高压中心和寒潮冷锋。850 hPa存在强盛的冷平流，锋生作用有利于冷锋加强。同时地面变压梯度大，造成大风天气。暴雪主要发生在700 hPa和850 hPa切变线之间。

Abstract: By using conventional meteorological observation data and ERA5 reanalysis data, the authors analyzed the cause of the super cold wave weather in Linfen during November 5~8 of 2021. The results show that: the circulation pattern of this cold wave process is Transversal Trough Changed to the Vertical, accompanied by a strong cold high center and a cold front. There is a strong cold advection at 850 hPa, and frontogenesis is conducive to strengthening the cold front. And large surface variable pressure gradient causes gale weather. The blizzard mainly occurred between 700 hPa and 850 hPa shear lines.