螺旋度在分析一次三峡大暴雨中的应用  

APPLYING HELICITY TO ANALYSIS OF TORRENTIAL RAIN OVER THE CHANGJIANG GORGES

作　　者：吴宝俊[1] 许晨海[1] 刘延英[1] 周丽[1] 于永安 魏东升 陈良华 

机构地区：[1]中国气象科学研究院,葛洲坝水力发电厂气象台

出　　处：《应用气象学报》1996年第1期108-112,共5页Journal of Applied Meteorological Science

基　　金：八五国家攻关项目;葛洲坝水力发电厂共同资助

摘　　要：用螺旋度分析了１９８２年７月１６日三峡区间出现的近２７年来最大一次暴雨．结果表明：①在垂直剖面图上，在雨区上空３００ｈＰａ附近，螺旋度有一个负的极小值中心；在６００ｈＰａ附近，有一个正的极大值中心②３００ｈＰａ螺旋度分布图上的极小值中心位置，与主要雨区中心位置非常靠近，相距约６０ｋｍ．The helicity was applied to analyse a torrential rain event, which was the he4viest one during 1964 - 1990, occurred on July 16, 1982 over the Changjiang Gorges. The results show that: (1)on the vertical section chart, there was a negative ndnimum centre of the helicity near 300 hpa land a positive maximum centre of the helicity near 600 hpa over the heavy rain area. (2) on the 300 hpa chart, the centre of the negative ndnimum of the helicity was most close to the centre of the main heaVy rain area, the distance between them was about 60 km.

关 键 词：螺旋度 三峡 暴雨 降水分析 

分 类 号：P458.121.1[天文地球—大气科学及气象学]