宁波机场一次台风外围雷暴过程分析  

Analysis of Thunderstorm Process in Outer Typhoon at Ningbo Airport

作　　者：奴开 陶俞锋 吴艾黎 Nu Kai;Tao Yu-feng;Wu Ai-li(Ningbo Air Traffic Management Station of Civil Aviation Administration of China,Ningbo 315000,Zhejiang Province,China)

机构地区：[1]中国民用航空宁波空中交通管理站,浙江宁波315000

出　　处：《科学与信息化》2023年第4期51-53,共3页Technology and Information

摘　　要：利用NCEP1°×1°的再分析资料和多普勒雷达数据对2021年9月11日发生在宁波机场上空的一次雷暴天气过程进行了分析.结果表明:①副高边缘上游高空槽东移,中低层有弱切变辐合,地面受第14号台风"灿都"外围云系影响导致的水汽持续输送形成了此次雷雨的环流背景.②宁波机场上空大气的不稳定参数为本场雷暴提供了充足能量,假相当位温θse均随高度上升而降低,有利于水汽和能量向高层输送,形成位势不稳定层结.③雷暴前期由台风外围云系引起,后期受副高边缘影响,最后发展成为热力性雷暴天气过程.Using NCEP 1°×1°reanalysis data and Doppler radar data,a thunderstorm weather process that occurred over Ningbo Airport on September 11,2021 was analyzed.The results show that:①the high-altitude trough in the upper reaches of the subtropical high edge moves eastward,there is a weak shear convergence in the middle and lower layers,and the continuous transport of water vapor on the ground under the influence of the peripheral cloud system of Typhoon No.14“Candu”forms the circulation background of this thunderstorm.②The unstable parameters of the atmosphere over Ningbo Airport provide sufficient energy for the local thunderstorm.The pseudo-equivalent potential temperatureθse decreases with the increase of altitude,which is conducive to the transport of water vapor and energy to the upper layer,forming a potential unstable stratification.③The thunderstorm is caused by the cloud system outside the typhoon in the early stage,and is affected by the edge of the subtropical high in the later stage,and finally develops into a thermal thunderstorm weather process.

关 键 词：雷暴 水汽通量 K指数 假相当位温 

分 类 号：P44[天文地球—大气科学及气象学]