大连市酸雨的变化趋势及来源简析

“十一五”期间大连市的酸雨污染呈波动趋势，2009年的酸雨污染最为严重，酸雨频率达到40．3％，pH均值4．84，属于中酸雨污染。大连市酸雨的来源受外来地区输送的影响较大，大连市本地源排放对硫和氮的湿沉降的贡献仅在10—20％之间；外来源中，山东排放的贡献占30～40％，辽宁其他区域的贡献10％左右，同时日本、朝鲜和韩...

Analysis in the Variational Trend and Sources of Acid Rain in Dalian

The acid rain pollution of Dalian presents to fluctuant trend during the eleventh five - year plan. The acid rain pollution Was the most serious in 2009. The frequency of the acid rain achieved 40. 3% and the pH value was 4.84 （medium acid rain pollution） . Acid rain in Dalian was significantly affected by external sources via transportation. The emissions from local sources only contributed to 10 -20% of wet deposition of sulfur and nitrogen. Among all external sources, emissions from Shandong contributed to 30 -40%, other regions in Liaoning only accounted for about 10%, and effect of emission in neighbor countries （ such as Japan,Noah Korea and South Korea） should not be neglected.