甘肃河西中部地区“87·6”罕见暴雨成因分析

摘要/Abstract

摘要：

对1987年6月10日20时至12日02时发生在甘肃省河西走廊中部荒漠戈壁地区罕见暴雨天气过程的大尺度环流形势和天气系统的分析表明,南支低槽发展东移,与之对应的地面冷锋侵入柴达木低涡,两者相互作用,共同发展东移,加之河西走廊低空东风气流的形成并输送大量的水汽和不稳定能量,是造成河西大范围普降大-暴雨的主要天气尺度系统;而锋面移入,触发不稳定能量释放,导致中尺度强对流系统发展,是直接造成金昌市罕见局地大暴雨的中尺度系统。

关键词: 甘肃河西中部地区, 暴雨成因分析

Abstract:

This paper analysed the large-scale circulation pattern and synoptic systems of the rare heavy rainfall occurred in the gobi desert in the middle part of the Gansu Hexi Corridor.The results showed that the large-scale rainfall occurred in the gobi desert in June 1987 was derived from the common effects of the three synoptic systems which were the short-wave trough of low pressure with surface cold front,the Qaidam depression and the low-level easterly jet along the Gansu Hexi Corridor.The results also indicated that the centre of heavy rainfall in Jinchang was derived from the mesoscale convective system formed by the release of instability energy aroused by the intruding of cold front.

Key words: Gansu Hexi Corridor, Heavy rainfall Gobi desert

王式功, 杨德保, 张武, 赵庆云, 辛春兰. 甘肃河西中部地区“87·6”罕见暴雨成因分析[J]. 中国沙漠, 1994, 14(2): 24-29.

Wang Shigong, Yang Debao, Zhang Wu, Zhao Qingyun, Xin Chunlan. AN ANALYSIS OF RARE HEAVY RAINFALL IN THE MIDDLE PART OF THE GANSU HEXI ORRIDOR IN JUNE 1987[J]. JOURNAL OF DESERT RESEARCH, 1994, 14(2): 24-29.

甘肃河西中部地区“87·6”罕见暴雨成因分析

AN ANALYSIS OF RARE HEAVY RAINFALL IN THE MIDDLE PART OF THE GANSU HEXI ORRIDOR IN JUNE 1987

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