春季滇南冰雹大风天气的螺旋度分析
投稿时间: 1998-09-14  最后修改时间: 1998-12-16  点此下载全文
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李英 云南省气象台, 昆明 650034 
中文摘要:用螺旋度对1997年3月发生在滇南的冰雹大风天气进行分析。结果表明:低层螺旋度的演变对冰雹大风天气有一定的指示意义:低层螺旋度的大值中心与降雹区比较靠近:螺旋度的垂直分布反映了降雹区大气的一些动力和热力特征
中文关键词:滇南  大风  冰雹  螺旋度
 
HELICITY ANALYSIS FOR HIGH WIND AND HAIL PROCESSES OVER SOUTH YUNNAN IN SPRING
Abstract:Helicity analysis was applied to several high-wind and hail processes, which occurred from 15 to 26 March 1997 over South Yunnan in spring. The results show that the change of helicity at the lower level has the indication of severe convection, and the positive maximum center of helicity is close to the central position of the high-wind and hail events. Moreover, the vertical distribution of helicity can reflect some dynamic and thermodynamic features of severe convection.
keywords:south Yunnan  high-wind  hails  helicity
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