CAJ | 학술논문

基于1991—2013年南京市降水监测数据，采用Spearman秩相关系数，分析了该市酸雨污染的变化情况，以及阴阳离子组分特征与变化趋势。结果表明，自1991年以来，南京市酸雨频率有所上升，降水pH值显著下降，酸雨污染有加重趋势；硫氧化物仍是该市降水酸化的主要因素，而其致酸作用逐年减弱，NO3－的致酸作用逐年加强；来源于化工行业的氯化物对降水的污染状况得以改善，来源于碱性颗粒物的钙对酸雨的中和作用逐年减弱。
기우1991—2013년남경시강수감측수거，채용Spearman질상관계수，분석료해시산우오염적변화정황，이급음양리자조분특정여변화추세。결과표명，자1991년이래，남경시산우빈솔유소상승，강수pH치현저하강，산우오염유가중추세；류양화물잉시해시강수산화적주요인소，이기치산작용축년감약，NO3－적치산작용축년가강；래원우화공행업적록화물대강수적오염상황득이개선，래원우감성과립물적개대산우적중화작용축년감약。
Based on the precipitation monitoring results in Nanjing City from 1991 to 2013 ,the variation of acid rain and the changing trend of ion composition and ion concentration were analyzed through Spearman corre-lation coefficient.The results showed that since 1991,the frequency of acid precipitation has been rising and the pH value shows marked drop in precipitation,which indicates that the acid rain pollution is on the rise.The main factor of acid precipitation is still sulfur oxides in Nanjing City,but its action on acid rain is decreasing year by year while the action of NO3-is rising.Pollution of precipitation caused by chlorides,which come from the chemi-cal industry,is improved.The neutralization effect of calcium, which comes from alkaline particulate matter, is weakened year by year.