2012年-2016年乐亭酸雨变化特征及影响因素分析研究

利用2012年-2016年乐亭国家基本气象站气象观测资料,分析了乐亭酸雨变化特征和降水量、风向、风速等气象因素对酸雨的影响.结果表明:年平均降水pH值和年酸雨频率呈下降趋势、平均K值呈上升趋势;秋季酸雨程度在四季中最严重,平均pH值为4.50,酸雨频率为38.4%;月平均pH值和酸雨频率呈现波动;酸雨平均pH值随降水量的增加而下降,酸雨频率随降水量的增加不断上升;月平均风速越大,月平均pH值越大,酸雨频率越小;酸雨发生时地面主导风向为NE、ENE、E,与上游地区燃煤型钢铁企业有一定关系.

Characteristics of Acid Rain and Its Influencing Factors from 2012 to 2016 in Laoting,Hebei Province

Based on the meteorological observation data of Leting national basic meteorological station for 2012-2016 years, the variation characteristics of acid rain in Leting and the influence of meteorological factors such as precipitation,wind direction and wind speed on acid rain were analyzed. The results showed that the average annual precipitation pH value and the frequency of acid rain decreased,the average K value increased;autumn was the most serious acid rain in the four seasons,the average pH value is 4.50,the frequency of acid rain for 38.4% months;the average pH value and the frequency of acid rain fluctuated;the average pH value of acid rain decreased with the increase of the precipitation and increased the frequency of acid rain with precipi-tation increasing;monthly average wind speed increases,the mean monthly pH value is greater,the smaller the frequency of acid rain;acid rain occurred when the dominant wind direction is NE,ground ENE,E,have a certain relationship with the iron and steel enterprises in the upstream area of coal.