2007～2013年丹东地区酸雨特征及成因分析

根据丹东2007 ～2013年的酸雨监测资料,对近年来该地区酸雨的时空分布特征进行了总结与分析,研究了不同气象条件对降水酸度的影响,分析了酸雨形成的原因.结果表明,丹东降水酸度呈波动性变化;2007 ～ 2013年降水平均pH年平均范围为4.82～5.51,pH均小于5.60,且自2008年以来,呈现波动下降的趋势;pH有明显的季节变化,以夏季酸度为最强、秋季为最弱;出现频率以秋季最高,为43.3％,春季最低,为30.1％.丹东酸雨的形成是该地区的自然和人为因素共同作用的结果,气象条件的变化对降水酸度影响相当明显,丹东市当地地形、工业布局和外来源也为酸雨形成做出了较大贡献.

Acid Rain Features and Cause Analysis in Dandong Region during 2007-2013

According to acid rain monitoring data in Dandong from 2007 to 2013,the spatial and temporal distribution features of acid rain in the region in recent years were summarized and analyzed,the influence of different meteorological conditions on precipitation acidity were studied,the formation causes of acid rain were analyzed.The result indicates that the Dandong precipitation acidity changes in volatility.Average annual precipitation in 2007-2013 average pH value range of 4.82-4.82,the pH value is less than 5.60,and since 2008,falling volatility trends; obvious seasonal change,pH value in the summer acidity is the strongest,autumn is the weakest; frequency as high as 43.3％ to fall,and the lowest in spring as 30.1％.In Dandong,the formation of acid rain is the result of natural and human factors,the effect of the change of weather conditions on precipitation acidity is quite obvious,the local topography,industrial layout and source is also made a bigger contribution for the formation of acid rain.