【摘要】 利用酸雨监测点2016-2022年的监测数据，分析酸雨变化趋势。结果表明：2016-2022年佛山市禅城区酸雨主要为弱酸性酸雨，降水pH值逐年上升，而酸雨频率逐年下降，酸雨污染整体呈减轻趋势，春、夏季酸雨污染较重，秋、冬季相对较轻，NO₃^-和SO₄^2-是降水致酸的关键性离子，降水SO₄^2-/NO₃^-呈逐年下降的趋势，酸雨污染类型从硫酸型过渡到硫酸-硝酸混合型逐渐向硝酸型转变，NO_3-对降水影响更加明显。更多还原

【Abstract】 The change trend of acid rain was analyzed by using the monitoring data of acid rain monitoring point from 2016 to 2022.The results showed that the acid rain in Chancheng district of Foshan City from 2016 to 2022was mainly weak acid rain.The pH value of precipitation was increasing and the frequency of acid rain was decreasing year by year.Acid rain pollution showed an overall decreasing trend.Acid rain pollution was heavy in spring and summer and light relatively in autumn and winter.NO₃^-and SO₄^2-were the key ions of acid induced in the precipitation.SO₄^2-/NO₃^-in the precipitation showed a decreasing trend year by year.And the acid rain pollution type had changed from sulfuric acid type to mixed sulfuric acid and nitric acid type,and to nitric acid type gradually.And NO₃^-had a more obvious effect on precipitation.更多还原