【摘要】 利用南昌市降水监测资料与高空气象探测资料,分析了南昌市酸雨污染的现状,揭示了南昌市酸雨的形成因素。研究表明,南昌市酸雨酸度大,频率高,且近年来降水pH值有下降趋势,主要是硫酸型污染,南昌市酸雨污染最严重的时段在秋、冬季。降雨pH值随着降雨等级的提高而增大,雨量的增大对降雨酸性有稀释作用。高空气象条件对酸雨有明显的影响,高空风风速小于7m/s时,酸雨频率较高,pH值也低,酸雨污染严重,反映了高空风对污染物水平输送同样具有稀释和冲淡的作用。逆温强度较强时,酸雨出现率增大。周边的工业区对南昌市酸雨的产生有明显作用。不稳定气象条件有利于大气低层污染的垂直和水平方向的扩散,可降低致酸污染物对区域的影响。更多还原

【Abstract】 Based on the precipitation monitoring data and meteorological data,the pollution situation of acid rain in Nanchang City was analyzed and the formative factors of acid rain were revealed.The study showed that the acid rain in Nanchang is always with great acidity and high frequency,besides,the pH value of the precipitation presents downtrend in recent years,and the pollution was much more serious during autumn and winter.The pH value of rainfall improved with the increasing of rainfall level,the raise of rainfall level could reduce the acid rain damage.Condition of meteorological in high altitude could affect the acid rain obviously,the frequency increased when wind speed in high altitude less than 7 m/s.The precipitation was mostly sulfate-based pollution.The weather condition had distinct effect on the acid rain pollution.更多还原