昆明长水机场一次中尺度天气的特征和物理机制分析  

Characteristics and Physical Mechanism of a Mesoscale Weather System at Kunming Changshui Airport

作　　者：赵德显 刘宏芳 窦体正 ZHAO Dexian;LIU Hongfang;DOU Tizheng(Yunnan Sub-bureau,Southwest Air Traffic Management Bureau CAAC,Kunming 650200 Yunnan,China)

机构地区：[1]中国民用航空西南地区空中交通管理局云南分局,云南昆明650200

出　　处：《民航学报》2022年第5期84-86,共3页Journal of Civil Aviation

摘　　要：昆明长水机场从2021年6月6日22:30时到7日07:00时发生了约8 h的雷雨过程,本文利用实况观测资料、NCEP再分析资料、多普勒天气雷达和风廓线雷达资料进行特征分析和诊断分析,发现此次过程先后由不同尺度的天气系统相互作用造成,根据其发展特征可以分为2个阶段:第一段主要为滇黔辐合区产生的分散性雷暴;第二段由滇黔辐合区和冷锋共同作用产生的成片雷暴云团,第二段对长水机场运行影响较大。风廓线雷达很好地反应出了天气系统的进退,能实时监测中尺度降水期间风的垂直切变和对流特征,卫星云图和多普勒雷达图反映了3个中β尺度对流云团合并成1个中α尺度对流云团的过程。通过诊断分析发现辐合区和切变线均有利于水汽辐合,近地层的正涡度都比较大。A thunderstorm lasting about eight hours occurred at Kunming Changshui Airport during 22:30 on June 6 to 07:00 on June 7,2021.In this paper,the characteristics and diagnosis are analyzed by using observation data,NCEP reanalysis data and Doppler weather radar and wind profile radar data.The weather process is caused by the interaction of different scales of weather systems.According to its development characteristics,it is divided into two periods:the first segment is mainly caused by the convergence of Yunnan Myanmar high and the southwest of Western Pacific subtropical high,and the second segment is caused by the convergence of Yunnan Myanmar high,continental high and Western Pacific subtropical high.The frontal thunderstorms generated in the two processes,especially in the second segment,have a great impact on the operation of Changshui Airport.The wind profile radar can well reflect the advance and retreat of the system and can monitor the vertical shear and convection characteristics of the wind during mesoscale precipitation in real time.Satellite cloud images and Doppler radar images reflect the process of the threeβ-mesoscale convective clouds merging into oneα-mesoscale convective cloud.The diagnosis analysis shows that the convergence zone and shear line are conducive to water vapor convergence,and there is a strong positive vorticity in the near surface layer.

关 键 词：辐合 锋面 雷暴 多普勒雷达 

分 类 号：P458.2[天文地球—大气科学及气象学]