北方强降水的气候特征

本文利用最近30—40年的资料，分析了北方强降水的气候特征。文中指出:北方暴雨日数明显少于南方，但强度大。我国大陆上的不同历时降水极值均出现在北方；降水时间集中在盛夏；最大一日降水量的强度对年降水量多寡有显著影响，且最大一日降水量的年际变差明显；北方的强降水常伴有强烈雷暴活动、历时短、降水覆盖面积小。

Climatic Characteristics of the Strong Heavy Rain in the Northern China

In this paper, by using the rainfall data during the last 30—40 years, we analysed the climatic characteristics of the very heavy rain in the northern China. It is shown that the heavy rain days in the northern China are less than that in the southern China, but the rain intensity is stronger. The maximum rain of various rain periods exists always in the northern China, most rain days are in midsummer. The maximum of the daily rainfall contributes significantly to the total rainfall of the year, and its annual variation is obvious. Furthermore heavy thunderstorm is often associated with heavy rainfall in the northern China, duration of rain is short and rainfall coverage is small