山西省2007年酸雨特征分析及成因初探

Analysis and Preliminary Study of Acid Rain Characteristics of Shanxi Province In 2007

本文利用五台山、大同、太原、长治、侯马5个酸雨观测站2007年1月～12月的酸雨观测资料，进行了分析，结果表明：五台山酸雨出现频率最高（85．96％），大同酸雨频率最低（36．36％）；侯马站年降水pH值最低（4．09），酸雨强度最强，大同的年降水pH值最高（5．36），酸雨程度最弱；各站pH值最低值一般出现在秋、冬和春季，说明与采暖期燃煤有关。山西酸雨的成因主要与工业结构以及气象因素有关。

In this paper, the acid rain data from Wutaishan , Datong, Taiyuan, Changzhi and Houma five observatories of acid rain in January 2007 to December was analyzed. The results showed that： the frequency of occurrence of acid rain in Wutaishan （85.96%） was the highest. The frequency of occurrence of acid rain in Datong was the lowest （36.36%）. Annual pH value of precipitation was the lowest （4.09） and had the strongest acid rain in Houma. Annual pH value of precipitation was the highest （5.36） and had the weakest acid rain in Datong. The low pH value always occurs in autumn, winter and spring during the heating period. So acid rain has a relationship with the coal - fired in Shanxi. The main causes of acid rain related with the industrial structures and meteorological factors.