2022年9月8日中卫市沙坡头区冰雹成因分析  

Analysis of the Causes of Hail in Shapotou District,Zhongwei City on September 8,2022

作　　者：陈星宜 庞婷婷 白春燕 杨苑[1,2,3] 王金弟 CHEN Xingyi;PANG Tingting;BAI Chunyan;YANG Yuan;WANG Jindi(Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Charac-teristic Agriculture in Arid Regions,CMA,Yinchuan 750002,China;Key Laboratory of Meteorological Disas-ter Prevention and Reduction of Ningxia,Yinchuan 750002,China;Zhongwei Meteorological Bureau,Zhong-wei 755000,China;Haiyuan Meteorological Bureau,Haiyuan 755200,China)

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]宁夏气象防灾减灾重点实验室,宁夏银川750002 [3]宁夏中卫市气象局,宁夏中卫755000 [4]宁夏海原县气象局,宁夏海原755200

出　　处：《河南科技》2024年第13期102-106,共5页Henan Science and Technology

摘　　要：【目的】分析2022年9月8日中卫市沙坡头区冰雹天气的成因,探讨此次冰雹的可预报性,为今后的冰雹预报提供更好的依据。【方法】利用常规地面观测资料、Micpas地面高空资料、探空资料、欧洲中心ECMWF ERA5的逐时再分析资料,对此次冰雹天气进行分析。【结果】此次冰雹过程为“两槽一脊”环流形势,受高空内蒙古冷涡槽及槽前的偏南气流、700 hPa的低空急流、850 hPa的切变、地面的风场辐合的影响,产生了此次冰雹天气。过程期间,中卫市沙坡头区850~500 hPa假相当位温随高度递减,850~500 hPa、700~500 hPa的温差较大,上冷下暖,大气的对流性较强;从水汽条件来看,对流层中层水汽条件较好;探空图上,CAPE值、K指数、SI指数、-20℃层、0℃层高度等指标均满足强对流天气的特征。【结论】9月8日午后有很强的不稳定能量,配合有对流层中低层较强的抬升运动,中层较好的水汽条件,导致中卫市沙坡头区出现冰雹,伴有短时暴雨及雷暴大风天气。[Purposes]The causes of hail weather in Shapotou District of Zhongwei City on September 8,2022 were analyzed,and the predictability of hail was discussed to provide a better basis for hail forecast in the future.[Methods]Based on the conventional ground observation data,Micpas ground altitude data,radiosonde data and the time-by-hour reanalysis data of ECMWF ERA5,this paper analyzes a hail weather in Shapotou District of Zhongwei City on September 8,2022.[Findings]The hail process was a"two trough and one ridge"circulation situation,which was influenced by the upper Inner Mongolia cold vortex trough and the southerly air flow in front of the trough,the low-level jet at 700 hPa,the shear at 850hPa,and the convergence of the surface wind field.During the process,the pseudo equivalent potential temperature of 850~500 hPa in Shapotou District of Zhongwei City decreases with height,and the temperature difference between 850~500 hPa and 700~500 hPa is large,and the upper part is cold and the lower part is warm,and the atmospheric convection is strong.From the water vapor condition,the middle troposphere water vapor condition is better.On the radiosonde map,CAPE value,K index,SI index,-20℃layer height,0℃layer height and other indicators meet the characteristics of strong convective weather.[Conclusions]In the afternoon of September 8,there was a strong unstable energy,combined with a strong lifting movement in the middle and lower troposphere and a good water vapor condition in the middle layer,and there was hail in Shapotou District of Zhongwei City,accompanied by a short-term rainstorm and thunderstorms and strong winds.

关 键 词：中卫市 冰雹 物理量场 

分 类 号：P458.3[天文地球—大气科学及气象学]