一次暖区强降水的热力动力条件  

Thermodynamic Conditions of A Warm-Zone Heavy Rainfall Event

作　　者：夏丽花[1] 吴启树 黄美金[1] 陈德花 石顺吉 

机构地区：[1]福建省气象台,福州350001 [2]福建省福州市气象台,福州350014 [3]福建省厦门市气象台,厦门361012

出　　处：《气象科技》2010年第5期572-576,662,共6页Meteorological Science and Technology

基　　金：福建省自然科学基金计划项目(W0650004)天气资助

摘　　要：利用地面自动站观测资料、雷达资料和NCEP再分析资料,分析了2009年4月19日福建中南部强降水过程的热力动力条件。结果表明:这次降水过程具有明显的中尺度雨团特征,直接影响系统是地面中尺度辐合线;低空西南急流为暖区强对流发生、发展提供了必要的水汽条件;低层暖平流、高层冷平流的上下层配置,使不稳定能量得以聚集,为对流发展提供必要的能量。By using the data from automatic ground stations, radar and NCEP reanalysis, the causes and thermodynamic conditions of a heavy rainfall event occurred in the central-southern Fujian on 19 April 2009 are analyzed. The results show that there were active mesoscale rain bands during this process; the mesoscale convergence zone at ground was a direct influencing factor; the southwest low-level jet provided water vapor for the occurrence and development of strong convection in the warm zone; the tow-level warm air advection and high-level cold air advection made unstable energy built up, and provided necessary energy for convection to develop.

关 键 词：暖区强降水 中尺度辐合线 急流 

分 类 号：P458.121[天文地球—大气科学及气象学]