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中文摘要: 1984年7月27日晚,在北京西郊北京大学综合观测了一场积雨云降水的全过程。包括两个降水过程:第一个降水过程持续时间短(33min),平均雨强大(12.9)mm/h),雨滴谱宽且出现多峰,降水pH值7.0左右;第二个降水过程的持续时间长(126min),平均雨强较弱(1.6mm/h),随降水的强烈冲刷,云下空气愈来愈干净,pH值连续下降至6.6,电导率也大大减小。
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Abstract:In the evening of July 27th, 1984, a whole process of a cumulonimbers precipitation was observed in Peking University, which had two developing processes and two declining processes. The first process of precipitation lasted a short time(33min) and had a high average rainfall density (12.9mm/hr). The pH value of the first precipitation was about 7.0.The second process of precipitation kept a long time(126min) had a low average rainfall density 1.6mm/hr, With the strong washout of precipitation, the atmosphere under the cloud became cleaner. The pH value of the second precipitation dropped 6.6 continually and the conductance became down markebly.
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引用文本：
张铮,刘宝章,1988.一次积雨云降水过程的宏微观物理特征和雨水酸度的综合观测[J].气象,14(2):3-8.
,1988.A comprehensive observation on macroscop and microscop physics and acidity of a Cb precipitation[J].Meteor Mon,14(2):3-8.
张铮,刘宝章,1988.一次积雨云降水过程的宏微观物理特征和雨水酸度的综合观测[J].气象,14(2):3-8.
,1988.A comprehensive observation on macroscop and microscop physics and acidity of a Cb precipitation[J].Meteor Mon,14(2):3-8.