广东“5.24”暴雨的湿有效能量分析  

An Analysis of the "5.24" Heavy Rain in Guangdong

作　　者：周海光[1] 刘延英[2] 石定朴[2] 

机构地区：[1]南京气象学院大气科学系,江苏南京210044 [2]中国气象科学研究院,北京100081

出　　处：《南京气象学院学报》2003年第6期859-864,共6页Journal of Nanjing Institute of Meteorology

基　　金：国家攀登95计划;科技部专项项目(2002IA20013)

摘　　要：利用海峡两岸及邻近地区暴雨试验期间的时间加密观测资料,分析了1998年5月24日发生在广东省的一次暴雨过程。发现湿有效能量与此次暴雨降水的关系比较清楚。降水开始前,暴雨区的能量显著增加,强降水开始于能量显著减少时;强降水时,暴雨区的能量出现小幅反弹;当暴雨区能量再次显著减少后暴雨降水结束;这是一次能量锋暴雨,暴雨开始前有能量锋生现象发生,暴雨强降水时段与强能量锋同步,暴雨区位于高能舌北侧能量锋附近。Using the intensive observation data of the torrential rainfall experiment over the both sides of the Taiwan Strait and adjacent areas,the 5.24 heavy rain in 1998 is analyzed in this paper,and its results are as follows.There is only one strong precipitation period in the middle of this heavy rain process.The relationship between moist available energy E_MA and rainfall is clear.Before the heavy rain occurred, the E_MA remarkably increased;the energy remarkably decreased when the strong precipitation began;there is a narrow recoil of energy during the strong precipitation period;the heavy rain ended when the E_MA remarkably decreased again.This heavy rain is an energy front heavy rain.Before the heavy rain occurred,energy frontogenesis had started,and the heavy precipitation is synchronized with the strong energy front. The area of the heavy rain located in the vicinity of energy precipitation front north of high-energy tongue.

关 键 词：暴雨 强降水时段 湿有效能量 能量锋 

分 类 号：P458.121[天文地球—大气科学及气象学]