2016年8月26—27日漳州降水过程分析

Analysis of Precipitation Process in Zhangzhou from August 26 to 27,2016

利用天气图、物理量场等常规天气资料,运用天气学诊断分析方法,对2016年8月26—27日漳州的一次强降水过程进行了综合分析。结果表明:本次漳州全市出现的局部暴雨过程,为副热带高压控制下低层弱切变,配合弱冷空气渗透南下引起的强对流天气过程;副热带高压及冷空气南下是此次局地大暴雨过程的大尺度环流背景,暴雨发生前几日的高温状态,加上低层水汽辐合,造成大气不稳定能量堆积,为局地暴雨形成提供了有利的环境条件。

A heavy rainfall process in Zhangzhou from August 26 to 27,2016 was comprehensively analyzed by using synoptic maps,physical field and other conventional weather data and synoptic diagnostic analysis methods.The results showed that the local rainstorm process in Zhangzhou was a severe convective weather process caused by the low level weak shear under the control of subtropical high and the infiltration of weak cold air into the south.The subtropical high and the cold air moving southward are the large-scale circulation background of this local heavy rain process.The high temperature state a few days before the rainstorm,coupled with the convergence of low-level water vapor,caused the accumulation of atmospheric unstable energy,providing a strong environmental condition for the formation and occurrence of local heavy rain.