【摘要】 通过2007-2014年丹东酸雨资料计算出酸雨年频率、月频率、季频率,选择强酸雨日通过分析2007年1月21日、2007年7月7日、2008年5月26日、2010年11月21日、2013年1月31日、2014年4月1日,4 d前的后向轨迹得出丹东酸雨的形成机制和传输方向,结论得出:(1)2008年酸雨发生频率最低,其余年份相差不多;(2)酸雨发生频率5、6、7、8月份最高,11月份较高,1、2、3、4、9、10、12月份最低;(3)夏季酸雨发生频率最高,春季酸雨发生频率较高,秋季和冬季最低;(4)几乎只要是东北风就有酸雨发生,可见丹东酸雨发生的原因和朝鲜随风飘来的污染物有很大关系,发生东风或者北风时酸雨发生频率为中等,其它风向酸雨发生频率较低;(5)丹东的致酸雨物质主要从不同方向,周围的区域都可以向丹东输来污染物,使丹东有酸雨发生,这只是片面几个强酸雨日的结果。更多还原

【Abstract】 Based on the acid rain observatory data in Dandong during 2007-2014, the annual average, monthly average and seasonal average of acid rain frequency were calculated and analyzed respectively. In addition, 6 typical strong acid rain days air Parcel transport baekwardtraieetory selected which are January 21, 2007, July 7, 2007, May 26, 2008, November 21, 2010,January 31, 2013 and April 1, 2014, are simulated by HYSPLIT model,respectively. The conclusions are as follows:(1)The frequency of acid rain in 2008 was the lowest and the other years were similar;(2)The frequency of occurrence of acid rain was the highest in May, July, August, and was higher in November, the lowest in 1, 2, 3, 4, 9, 10, and 12 months;(3)The frequency of acid rain happened is the highest in summer, and the frequency of acid rain happened is higher in spring and the lowest in autumn and winter.(4)Acid rain occurs almost as long as the northeast winds. It can be seen that the reason for the occurrence of acid rain in Dandong is related to North Korea’s pollutants floating in the wind. The frequency of acid rain oc-curring in the east or north wind is modium, and the frequencies of other acid rains frequent are more low;(5)Dandong’s acid rain material mainly from different directions, the surrounding area can be sent pollutants to Dandong, so that there is acid rain in Dandong, this is only One-sided result of a few strong acid rain day.更多还原