一次三峡大暴雨的地转螺旋度分析  

Application of the Geostrophic Helicity to Analysis of A Heavy Rainfall Event over the Gorges of the Yangtse River

作　　者：吴宝俊[1] 许晨海[1] 刘延英[1] 樊根彦 于永安 陈良华 魏东升 邓立新 

机构地区：[1]中国气象科学研究院,北京100081 [2]葛洲坝水力发电厂气象台,宜昌443002

出　　处：《气象科学》1996年第2期142-150,共9页Journal of the Meteorological Sciences

基　　金："八五"国家攻关项目!"85─906─08";葛洲坝水力发电厂资助

摘　　要：本文引入了地转螺旋度概念，并将其用于一次大暴雨的分析，结果发现：在地转螺旋度垂直剖面图上，在雨区上空300hPa附近有一个负的极小值中心，在500hPa附近有一个正的极大值中心，该分布形成原因可用图6解释。In this article,the geostrophic helicity had been introduced and applied to analysis of a heavy rainfall event. The results showed that on vertical section chart there was a negative minimum value centre near 300 hPa and there was a positive maximum value centre near 500hPa over the heavy rainfall area. The figure 6 can be used to explain why the above-mentioned hg distribution pattern is formed.

关 键 词：螺旋度 地转螺旋度 暴雨 三峡地区 

分 类 号：P458.121.1[天文地球—大气科学及气象学]