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中文摘要: 导致2001年5月云南5次强降水和5月降水特多的原因,主要是由于500hPa青藏高压东南侧多次生成的横切变与副高外围西南暖湿气流和地面弱冷空气影响所致。伊朗高压快速东移上青藏高原,促使500hPa和700hPa高压环流长时间盘踞在青藏高原上,冷空气和高原横切变不断影响云南,是云南雨季特早和强降水形成的主要原因。
中文关键词: 高原横切变，西南急流，雨季，洪涝
Abstract:The reasons for five severe rain events and unusually great rainfall in May 2001 in Yunnan area are mainly caused by transversal shear produced at the southeastern side of the Qinghai Xizang high on 500hPa, the warm wet southwest air current in the periphery of subtropical high and weakly surface cold air.Furthermore,Iran high moves eastward quickly to Qinghai Xizang Plateau impelling high circulation on 500hPa and 700hPa settled in the Plateau for a long time,cold air and plateau transversal shear affects Yunnan area conscantly,which are main reasons of unusually early rainy season and formation of severe rainfall.
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引用文本：
普贵明,鲁亚斌,海云莎,2002.2001年5月云南罕见强降水天气过程的成因[J].气象,28(6):48-51.
,2002.Analysis of the Reason for Rarely Severe Rainfall of Yunnan in May 2001[J].Meteor Mon,28(6):48-51.
普贵明,鲁亚斌,海云莎,2002.2001年5月云南罕见强降水天气过程的成因[J].气象,28(6):48-51.
,2002.Analysis of the Reason for Rarely Severe Rainfall of Yunnan in May 2001[J].Meteor Mon,28(6):48-51.