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中文摘要: 从环流场、湿度锋区、高低空急流以及动能涡散场等几个方面分析了1997年春季云南南部多风雹天气的环境场条件，对南支槽、低层湿度梯度的变化、风场急流和垂直运动、以及涡散场动能的转换等与风雹天气的关系有了更深入的认识，一些分析结论可供预报参考。
中文关键词: 大风冰雹，环境场，分析
Abstract:The ambient fields for much high wind and hail were analysed by the atmoshpere general circulation,humidity front,high and low level jet and kinetic energy of vorticity and divergent components over south Yunnan in spring in 1997. The new knowledge about the variations of south trough in westerlies,humidity gradient in low level,jet and perpendicular velocity,and kinetic energy of vorticity and divergent components were obtained and the results are valuable in forecasting.
keywords: high wind,ambient field,analysis
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引用文本：
段旭,李英,周毅,1998.春季滇南大风冰雹天气的大尺度环境特征[J].气象,24(6):39-43.
,1998.Ambient field characteristics of High wind and Hail over South Yunnan in Spring[J].Meteor Mon,24(6):39-43.
段旭,李英,周毅,1998.春季滇南大风冰雹天气的大尺度环境特征[J].气象,24(6):39-43.
,1998.Ambient field characteristics of High wind and Hail over South Yunnan in Spring[J].Meteor Mon,24(6):39-43.