气象与环境学报2024，Vol.40Issue(6)：19-27,9.DOI:10.3969/j.issn.1673-503X.2024.06.003
2021年11月8日黑龙江南部一次冻雨天气过程成因分析
Causes of a freezing rain event in southern Heilongjiang province on November 8,2021
摘要
Abstract
Using datasets of the hourly surface observation,upper-air observation,and ERA5 reanalysis,the study analyzes the precipitation phase characteristics and the causes of a freezing rain event in southern Heilongjiang province during the rain-snow weather process on November 8,2021.Results show that the atmospheric circulation background features an eastward-moving and intensifying upper-level low vortex.The southeastern jet stream trans-porting warm and moist air provides moisture and energy for the precipitation,forming a warm layer that causes the freezing rain.The stratification over the freezing rain area exhibits a"cold-warm-cold"structure.Ice crystal growth produces snow in the upper cold layer,which melts into rain upon entering the warm layer.As the rain descends through the cold layer near the surface,it remained in a supercooled liquid state,forming freezing rain i.e.a process consistent with the"ice-phase melting"mechanism.The warm advection-induced warming in the mid-to-lower atmosphere is indicative of freezing rain,while the northeasterly in the lower layer contributes to cold advec-tion.Sustained and strong northeasterly tends to enhance cold advection,causing a temperature drop in the cold layer and increasing the freezing rain intensity.Further comparison with a typical freezing rain event in Jilin province re-veals that a strong warm layer and pronounced inversion layer significantly contribute to the intensified freezing rain.关键词
温度平流/暖层厚度/冰相融化Key words
Temperature advection/Warm layer thickness/Ice-phase melting分类
天文与地球科学引用本文复制引用
马国忠,安英玉,关铭,王秋京..2021年11月8日黑龙江南部一次冻雨天气过程成因分析[J].气象与环境学报,2024,40(6):19-27,9.基金项目
沈阳大气环境研究所开放基金(2019SYIAE01)和黑龙江省气象局科技创新发展项目(HQFZ2022014)共同资助. （2019SYIAE01）
