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中文摘要: 利用长江中下游116年梅雨资料及近50年的基本雨型划分结果,统计分析了三类雨型的梅雨特征,并对20世纪80年代以后的梅雨及旱涝异常作了成因分析。结果指出,80年代以来夏季东亚阻塞高压活动频繁,从而遏制了西太平洋副热带高压季节性北进是夏季梅雨偏丰和雨带偏南的直接原因,其根本原因还有待进一步研究。
中文关键词: 长江中下游梅雨，中国夏季旱涝，成因分析
Abstract:According to the Meiyu data of mid-lower reaches of Changjiang River during 1885 to 2000 and the principal rainfall pattern during 1951 to 2000, Meiyu characteristics of the summer drought/flood pattern(SDFP) Ⅰ、Ⅱ、Ⅲ in China are statistically analyzed, and the causes of formation of the abnormal Meiyu and the abnormal drought/flooding after 1980s are studied. As a result, the Eastern Asian blocking high has been more frequently active since 1980s, which is unfavorable to the northward seasonal movement of west Pacific subtropical high. That is the reason why the Meiyu precipitation is rather rich in summer and the rainbelt is located on the southern China, but the further reason remains to be continued to study.
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引用文本：
杨义文,2002.长江中下游梅雨与中国夏季旱涝分布[J].气象,28(11):11-16.
,2002.Relationship between Summer Drought/Flood Pattern in China and Meiyu of Mid-lower Reaches of Changjiang River[J].Meteor Mon,28(11):11-16.
杨义文,2002.长江中下游梅雨与中国夏季旱涝分布[J].气象,28(11):11-16.
,2002.Relationship between Summer Drought/Flood Pattern in China and Meiyu of Mid-lower Reaches of Changjiang River[J].Meteor Mon,28(11):11-16.