厦门地区酸沉降现状研究

Study on Current Situation of Acid Deposition in Xiamen Area

在１９９２～１９９４年，厦门地区进行了降水的连续监测。结果表明：厦门地区降水已呈酸性，其年均ｐＨ值范围为４．４８～５．０９，酸雨的频率为４６％～９２％；降水酸化的季节性变化明显，四季的降水酸化程度顺序为春季＞冬季＞夏季＞秋季；降水中的主要阴离子为ＳＯ２－４，表明厦门地区的酸雨为硫酸型。

Continuous monitoring of precipitation had been carried out in Xiamen area from 1992 to 1994. The results show that the rainwater in Xiamen area is acidified, the year average pH range is from 4.48 to 5.09, and the frequency of acid rain is from 46% to 92%; the seasonal variation of rainwater acidity is obvious, and the degree order (from high to low) is spring, winter, summer and autumn; the main anion in rainwater is SO 2- 4, which means that acid rain in Xiamen area is sulfur acid type; there is a more serious tendency of rainwater acidity year by year.