摘要
利用常规气象观测资料、ERA5再分析资料以及FY-2C卫星云图等资料,对2020年8月12—13日出现在保定地区的一次较强暴雨天气过程进行诊断分析。结果表明,影响此次暴雨天气过程的系统主要有高空槽、高低空急流、低层切变线。高低空急流配合与低层辐合切变为暴雨的形成提供了动力条件。假相当位温高能舌前部、能量锋区南侧、低空急流左前方三者相叠加的区域是暴雨的易发区。暴雨发生前保定本地水汽条件良好。850 hPa假相当位温能量锋区对高空槽的发展和低层暖湿气流抬升具有重要作用,为中尺度对流运动的发展保证了能量供应。
Based on the conventional meteorological observation data,ERA5 reanalysis data and FY-2C Satellite image data,a rainstorm process in Baoding region on August 12-13,2020 was diagnosed and analyzed.Upper-level trough,upper and low-level jets,low-level shear lines were the important impact weather systems.The combination of high and low level jet flow and low level convergence shear provided the dynamic conditions for the formation of rainstorm.The area where the front of the pseudo-equivalent potential temperature high-energy tongue,the south of the energy frontal zone and the left front of the low-level jet were superimposed,which was the area prone to rainstorm.Local water vapor condition in Baoding were good before the rainstorm.The pseudo-equivalent potential temperature energy frontal zone at 850 hPa played an important role in the development of the upper-level trough and the uplift of the lower-level warm and humid air flow,which ensured the energy supply for the development of the mesoscale convective movement.
作者
张思涵
ZHANG Si-han(Dingzhou Meteorological Bureau of Hebei Province,Dingzhou,Hebei 071000)
出处
《安徽农业科学》
CAS
2022年第13期207-211,共5页
Journal of Anhui Agricultural Sciences
关键词
暴雨
高低空急流
水汽条件
能量锋区
Rainstorm
High and low level jet flow
Water vapor condition
Energy frontal zone
