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中文摘要: 利用松花江、嫩江流域内94个气象台站的观测资料和NCAR/NCEP再分析资料，分析了1998年夏季降水集中期和主要暴雨过程发生时的天气形势特点。之所以会连续出现暴雨、大暴雨，归纳起来有以下天气特点：(1)亚洲中高纬度阻塞形势稳定；(2)长时间受东北冷涡控制；(3)西太平洋副热带高压短时间北进，位置适中；(4)盛夏北方季风较强盛。
中文关键词: 天气形势，暴雨过程，松花江，嫩江
Abstract:The weather circulation pattern of the summer tight precipitation period and the main heavy rain course in 1998 were analyzed with the NCAR/NCEP and daily precipitation data from 94 surface stations in Songhuajiang and Nenjiang area.The continuous rainfall can be contributed to the following weather patterns:(1)the steady blocking pattern in the middle and high latitude of Asia,(2) controlled by cold vortex long term,(3)advancing north ward of the subtropical high over the west Pacific and its suitable position,(4)the strong monsoon in midsummer.
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引用文本：
陈立亭,孙永罡,白人海,2000.松花江、嫩江流域1998年夏季暴雨过程天气分析[J].气象,26(10):19-23.
,2000.The Analysis of Weather Pattern in the Heavy Rain Process Over Songhuajiang and Nenjiang in 1998[J].Meteor Mon,26(10):19-23.
陈立亭,孙永罡,白人海,2000.松花江、嫩江流域1998年夏季暴雨过程天气分析[J].气象,26(10):19-23.
,2000.The Analysis of Weather Pattern in the Heavy Rain Process Over Songhuajiang and Nenjiang in 1998[J].Meteor Mon,26(10):19-23.