| 摘要: |
| 利用常规气象观测资料、NCEP-FNL分析资料和FY-2F卫星TBB资料并结合涡度收支方程，对2018年3月13日贵州省中西部一次冰雹天气的TBB特征、环境场和涡度收支进行诊断分析。结果表明，此次过程降雹主要发生在云团的生成到发展期，TBB能够很好地反映出此次冰雹天气过程的云团演变特征；适宜的温度环境条件有利于冰雹的发展；中低层的热力不稳定和动力不稳定有利于冰雹的生成和发展；涡度平流和水平辐合辐散是此次冰雹发生的主要动力条件，局地涡度中低层为正，高层为负，说明中低层辐合加强，有利于垂直上升运动的加强。 |
| 关键词: 冰雹天气；TBB；环境场；涡度收支；诊断分析 |
| DOI： |
| 投稿时间：2020-01-06 |
| 基金项目:贵州省气象局科研业务项目（黔气科登[2019]11-10号）：基于卫星和雷达资料的“Fast”冰雹识别指标初探；贵州省人工影响天气科研业务自立项目（GZRY201834）：EC细网格预报在防雹作业潜力中的应用；中国气象局云雾物理环境重点实验室开放课题（2018Z01602）：贵州冰雹云回波移动特征及形成机理研究 |
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| Vorticity Budget Analysis of a Hail Weather Process in the Midwest of Guizhou Province |
| LUO Xiong,LUO Xiping,ZENG Yong,HUANG Yu,CUI Lei |
| (Weather Modification Office of Guizhou Province, Guiyang 550081 , China;Guizhou Meteorological Disaster Prevention Technology Center, Guiyang 550081 , China) |
| Abstract: |
| The temperature of black body (TBB ) characteristics, environmental field and vorticity budget of a hail weather process, occurred in Midwest of Guizhou province on 13 March 2018, were analyzed based on the conventional observation data, the National Centers for Environment Prediction Final Analysis (NCEP-FNL) data, the TBB data from the Fengyun-2F (FY-2F) satellite with vorticity budget equation. The results show that the hail mainly occurs during the formation and development of cloud clusters. The TBB can indicate the cloud evolution characteristics of the hail weather process. The hail develops easily due to suitable conditions of temperature--thermal instability and dynamic instability in the middle and lower layers. Vorticity advection and horizontal convergence and divergence are the main dynamic conditions for the occurrence of the hailstorm. The local vorticity is positive in the middle and lower layers, and negative in the upper layers, indicating that the convergence of the middle and lower layers is strengthened, which causes to strengthen the vertical upward movement. |
| Key words: hail weather； TBB； environmental field； vorticity budget； diagnostic analysis |
