广东2009年深秋重旱背景下异常暴雨的特点及成因  

The Characteristics and Cause Analysis of Guangdong Abnormal Torrential Rain in the Background of Late Autumn Severe Drought in 2009

作　　者：陈炳洪[1] 林良勋[1] 张东[1] 吴乃庚[1] 

机构地区：[1]广州中心气象台,广东广州510080

出　　处：《广东气象》2010年第1期5-8,共4页Guangdong Meteorology

基　　金：广东省科学技术厅项目"亚运会气象预报服务系统研究"(2009A030302012)资助

摘　　要：在深秋重旱的背景下,2009年11月11～13日广东出现一次少见的暴雨过程,落区主要在干旱严重的粤北和珠江三角洲地区。分析其环流场发现,高纬西风槽东移引导较强冷空气南下,冷暖空气在华南相互作用导致本次暴雨的发生。物理量的诊断和数值模拟结果显示水汽辐合上升释放凝结潜热,对暴雨的维持起到最重要的作用。In the background of late autumn severe drought, a torrential rain happened in Guangdoug province from 11th to 13th, November 2009. The precipitation center was located on the severe drought region, northern Guangdong and Pearl River Delta. By analyzing the circulation situation, it is revealed that the east movement of westerly trough at high latitude led strong cool air down to the south. The interactions between cold and warm air mass produced the torrential rain. Moreover, the quantity diagnosis and numerical simulation show that the convergence of water vapor, which releases latent heat, also played an important role in the maintenance of the heavy rain.

关 键 词：天气学 水汽通量 诊断分析 数值模拟 深秋暴雨 广东 

分 类 号：P44[天文地球—大气科学及气象学]