2013年9月13日上海地区雷暴天气过程分析  

Analysis of a thunderstorm weather event happened in Shanghai on 13 September 2013

作　　者：李新峰[1] 梅珏[1] 陈志豪[1] 魏超时[1] 

机构地区：[1]民航华东空管局气象中心,上海200335

出　　处：《暴雨灾害》2015年第4期343-351,共9页Torrential Rain and Disasters

摘　　要：利用卫星云图、多普勒天气雷达资料、常规地面和高空观测资料,对2013年9月13日上海全年最强雷暴天气过程进行了天气学诊断分析,简要讨论了不同尺度天气系统的发展演变以及作用。研究结果表明:(1)此次强对流天气是在变形场环流背景下发生的,较强的不稳定层结、低层充沛的水汽和高低空急流相互作用所形成的较强的大尺度辐合抬升,为其提供了有利的环境条件。(2)在此基础上,边界层辐合区触发大气释放不稳定能量,引发对流单体的初生。(3)该过程包含三个阶段的中γ或β尺度对流系统的发生、发展、移动和合并过程,雷暴云团在大气边界层辐合线中被触发,沿辐合线后向传播发展,加强边界层辐合线初生的监控对强雷暴发生的预警以及传播方向预报有着重要意义。A thunderstorm weather that seriously impacted air traffic on 13 September 2013 in Shanghai is studied. Using satellite imagery,Doppler radar and conventional observations, synoptic and mesoscale weather conditions for this event are analyzed, with focus on the evolution of different weather systems and their interactions. Results are as follows.（1） This event occurred under the condition of a deformation field. Several factors are favorable to the development of the storm, such as strong unstable stratification, sufficient water vapor in the low level and strong large-scale the convergence and upward motion induced by high- and low-level jet interaction.（2） Under such favorable conditions, the surface wind convergence triggered the unstable energy to be released, and triggered the initial convection in northern Shanghai.（3）Based on meso-analysis, it is indicated that there are three γ or β-mesoscale convictive systems during this heavy precipitation event. The convective cells are initiated and propagated along the boundary layer convergence line. Therefore, boundary layer convergence line analyses is very important for early warning and prediction of the convective systems.

关 键 词：雷暴 急流 中尺度分析 边界层辐合线 

分 类 号：P458[天文地球—大气科学及气象学]