摘要
利用micaps常规观测资料,采用天气动力学分析方法,对2015年5月中旬在广西北部地区出现的两次暴雨天气过程进行分析,结果表明:(1)两次强降雨天气过程都受地面冷空气、低空切变线和高空波动东移影响,其中15-16日暴雨过程前期为暖区暴雨,后期为锋面暴雨;19-20日暴雨过程为地面静止锋和低空切变线在桂北地区来回摆动引起的锋面暴雨;(2)15-16日暴雨过程的动力条件和水汽条件较好,19-20日暴雨过程的不稳定能量更加有利于暴雨天气的持续;(3)物理量场的大值中心及要素值的变化对两次暴雨预报有很好的参考意义。
Based on micaps conventional observation data, the weather dynamics analysis method, twice torrential rain weather processes in May 2015 of northern Guangxi were analyzed. The results show that： （1） two heavy rain weather processes were affected by grounding cold air, low-level shear line and high- altitude volatility eastward, in which the early stage of torrential rain appearing on 15th-16th was warm- sector rainstorm and late stage rainstorm turned into frontal rainstorm while frontal torrential rain happening on 19th-20th caused by ground stationary front and the low-level shear line swinging in northern Guangxi. （2） The first rainstorm process have better dynamic condition and moisture condition while the unstable energy of second raining process is more conducive to the continuous heavy rain. （3） The center of large value and elements variation of physical quantity has very good reference for heavy rain forecast.
出处
《气象研究与应用》
2016年第1期38-42,共5页
Journal of Meteorological Research and Application
关键词
桂北
暴雨
环流特征
物理量
分析
northern Guangxi
torrential rain
circulation characteristic
physical quantity
analysis
