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中文摘要: 黄河中游地区区残性暴雨的爆发及强弱与低纬天气系统（尤其是台风，含热带风暴、强热带风暴，下同）有着密切的关系。普查了1982—1991年6—9月间黄河中游地区区域性暴雨过程。分析了中、低纬天气系统相互作用下，该区出现区域性暴雨时的水汽来源、输送及辐合、辐散的空间结构特征。结果表明；该区产生区域性暴雨以上强度降水所需水汽的75％以上来自台风，台风所提供的水汽主要是从700hPa以下输入到该区，且水汽输送通道中心始终维持在850hPa附近。故低层水汽输入量的大小是该区能否产生区域性大暴雨、特大暴雨的关键。水汽输送通道中心的移向与低空东南急流的移向一致。另外，暴雨区南侧或东南侧底层水汽强迫辐散区的存在，有利于周围水汽向暴雨区发生再辐合。
中文关键词: 中低纬天气系统，相互作用，暴雨，水汽特征
Abstract:The outbreak and intensity of regional storm in the middle reaches of Huanghe River is closely related to the low latitude synoptic system (especially typhoon). The regional storm pro-cess in middle reaches of Huanghe River during June to Sept in 1982-1991 has been investigated. As the regional storm appeared,the space-structure characteristics of moisture source,transportioon,convergence and divergence influenced by the interaction of middle and low latitude synoptic systems were analysed. It is shown that 75 Percent moisture of regional storm and upwards precipitation stems from typhoon,and the moisture source is located bellow 700hpa. The moisture channel center is maitained over 850hpa. The key factors of the regional storm and hard rain are the input capacity of low-level moisture. The movement direction of the moisture channel center is identical with the low-level southeast jet. Otherwise,the presence of the lower surface moisture forced divergence in the south and southeast of the storm region is benefit to the moist ture re-convergence towards the storm region.
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引用文本：
黄石璞,夏立新,1996.黄河中游暴雨的水汽特征[J].气象,22(3):22-28.
,1996.The Moisture Feature of Storm in the Middle Reaches of Huanghe River[J].Meteor Mon,22(3):22-28.
黄石璞,夏立新,1996.黄河中游暴雨的水汽特征[J].气象,22(3):22-28.
,1996.The Moisture Feature of Storm in the Middle Reaches of Huanghe River[J].Meteor Mon,22(3):22-28.