泾源县一次暴雪天气过程的成因分析  

Analysis of the Causes of A Heavy Snow Weather Process in Jingyuan County

作　　者：马霞 王鲜丽 田倍齐 Ma Xia(Key Laboratory of Monitoring and Early Warning and Risk Management of Characteristic Agrometeorological Disasters in Arid Regions of China Meteorological Administration,Yinchuan,Ningxia 750002)

机构地区：[1]中国气象局旱区特色农业气象灾害监测预警与风险管理重点实验室,宁夏银川750002 [2]泾源县气象局,宁夏泾源756400 [3]西吉县气象局,宁夏西吉756200 [4]隆德县气象局,宁夏隆德756300

出　　处：《农业灾害研究》2023年第10期250-252,共3页Journal of Agricultural Catastrophology

摘　　要：利用常规气象资料、NCEP再分析资料和新一代多普勒天气雷达资料等,对2023年2月7—8日泾源县出现的一次暴雪天气过程成因进行分析。结果表明:受500 hPa高空短波槽东移与700 hPa低空急流、地面倒槽、降雪期间冷高压的稳定维持,以及六盘山地形的抬升作用共同影响,泾源县出现暴雪天气,此次过程相对湿度和比湿条件有利于暴雪的发生发展,提供了充足的水汽条件;低层辐合高层辐散、强烈的上升运动为暴雪提供了很好的动力条件。Using conventional meteorological data,NCEP reanalysis data,and new generation Doppler weather radar data,analyzed the causes of a blizzard weather process that occurred in Jingyuan County from February 7 to 8,2023.The results showed that this precipitation was caused by the eastward movement of the 500 hPa high-altitude shortwave trough and the 700 hPa low-level jet,the stable maintenance of the cold high pressure during the snowfall period,as well as the uplift of the Liupanshan terrain,which jointly led to the occurrence of a blizzard in Jingyuan.The relative humidity and specific humidity conditions during this process were conducive to the occurrence and development of the blizzard,providing sufficient water vapor conditions;The low-level convergence and high-level divergence,as well as strong upward motion,provide good driving conditions for blizzards.

关 键 词：暴雪 泾源 环流形势 倒槽 

分 类 号：P458.122[天文地球—大气科学及气象学]