平果县2008年11月致洪暴雨天气成因分析  

Analysis on the Torrential Rain of Pingguo County in Nov.2008

作　　者：陈华宣 黄淑娟[2] 唐毓勇 

机构地区：[1]平果县气象局,平果531400 [2]百色市气象局,百色533000

出　　处：《气象研究与应用》2011年第1期34-36,39,共4页Journal of Meteorological Research and Application

摘　　要：利用常规气象资料、自动站资料和广西百色SB雷达资料等,分析了2008年10月28日～11月3日的高空环流形势、地面气压场,物理量场、单站降雨量随时间的演变、组合反射率与基本速度图等。结果表明:(1)大范围短时暴雨和大暴雨是导致平果县境内山洪暴发成灾的主要原因;(2)暴雨雨带通常位于500hPa副高588线外侧的100～200Km范围内,稳定的副高有利于对流性降水发生"列车效应";(3)热带气旋和副高南沿之间的低空东南急流为暴雨区输送大量的水汽,并提供主要的对流触发条件;(4)边界层冷空气的入侵对静止锋前暖区对流具有明显的增强作用。Basing conventional meteorological data,AWS data and SB Radar data,etc.the upper air circulation situation,surface pressure field,physical elements,rainfall evolution,the combined reflectance images and basic speed images of Radar from October 28～November 3,2008 in Baise City were analyzed.The results show that：（1）A wide range of short-term rainstorms led to the flash floods disaster in Pingguo County.（2）The rain belt usually located outside of 500hPa subtropical high,100～200Km range of 588 lines.The stable subtropical high was conducive to convective rainfall＂train effect＂.（3）The low-level southeast jet between tropical cyclones and subtropical high provided quantities of water vapor and induced convective motion.（4）The invasion of cold air from the boundary layer enhanced the convection significantly in the warm area of stationary front.

关 键 词：暴雨 热带气旋 副高 静止锋 

分 类 号：P458.121.1[天文地球—大气科学及气象学]