2016年8月23-24日青海省河南县强降水天气诊断分析

利用常规观测资料、Micaps、卫星云图、多普勒雷达资料等,从环流背景、物理量、卫星云图、雷达回波等方面,对2016年8月23—24日青海省河南县出现的一次短时强降水天气进行分析,探讨造成此次强降水的主要成因。结果表明,在588 dagpm线副高控制范围内高湿高温状态下,冷暖空气的汇合以及切变辐合造成了此次对流不稳定;在具备充分水汽供应的条件下,垂直方向上低空辐合、高空辐散的配置为此次降水提供了动力条件。对流旺盛、雷达强回波带过境的地方会造成强降水。

Diagnosis Analysis of Heavy Rainfall Weather in Henan County of Qinghai Province from 23 to 24 August ,2016

Using conventional observation data,Micaps,satellite images and Doppler radar data,from the aspects of circulation background,physical quantity,satellite cloud map,radar echo and so on,the short-term heavy rainfall weather occurred in Henan County in August 23-24,2016 was analyzed,and the main causes of the heavy rainfall were discussed.The results showed that in the subtropical high control within the scope of the high temperature wet state of 588 dagpm line,the confluence of cold and warm air,and the shear convergence caused the convective instability.With sufficient water vapor supply conditions,the configuration of the vertical direction of the upper divergence and low-level convergence provided dynamic conditions for the precipitation.Strong convection,radar strong echo zone transit would cause heavy rainfall.