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中文摘要: 利用EC数值预报客观分析场、实时观测资料和灾情统计资料，对2004年我国重大灾害性天气事件和环流形势特征进行了天气学分析。结果表明我国华北、东北很多地区和南方发生季节连旱与大气环流异常密切相关，致洪暴雨、强雷暴和沙尘暴灾害性天气事件是在有利的环流形势下天气系统相互作用的结果。把握好环流形势和影响天气系统演变特征，对于提高灾害性天气预报准确率和减灾、防灾有重要意义。
中文关键词: 灾害性天气，干旱，暴雨，雷暴，环流特征
Abstract:Based on analysis data of EC numerical model, real-time observation and statistical calamitous data, a synoptic analysis of the weather and the circulation situation in 2004 is made. The result shows that the continuous drought happened in North China, Northeast China and South China is closely related to the abnormal of the synoptic circulation. The interaction of the synoptic system under the favorable situation resulted in the calamitous weather such as heavy rain, thunderstorm and sandstorm etc. Having a good understanding of the synoptic situation and evolution character of the affecting weather system is very important to improve forecast accuracy of the calamitous weather and the disaster prevention.
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引用文本：
王维国,饶晓琴,康志明,艾秀,2005.2004年我国重大灾害性天气和大尺度环流特征[J].气象,31(5):26-31.
,2005.Analysis of the Calamitous Weather and Large-scale Circulation in 2004[J].Meteor Mon,31(5):26-31.
王维国,饶晓琴,康志明,艾秀,2005.2004年我国重大灾害性天气和大尺度环流特征[J].气象,31(5):26-31.
,2005.Analysis of the Calamitous Weather and Large-scale Circulation in 2004[J].Meteor Mon,31(5):26-31.