影响长沙年降水酸性的因子探索

利用Daniel的趋势检验、因子相关分析等方法,分析1986～2010年长沙市主要空气污染物浓度、中国SO2排放量的年际变化特征,以及两者与长沙年降水酸性的相关性,同时讨论了致酸物质的传播路径,还对可能有影响的气象要素进行相关性分析,以期探索酸雨预报提供预报因子。结果表明,长沙市年降水酸性呈现一次明显的"脉动"变化,酸雨性质已转为硫酸、硝酸混合型;降水酸度并没有随当地SO2的浓度下降而下降,尚不能说明当地近地层致酸污染物的排放是形成该地酸雨的主要原因;中国大范围SO2的排放量与年降水酸性关系密切;影响长沙年降水酸性的主要致酸物质来自全球的排放,其中西南地区、华南地区的排放起重要作用;所选气象因子的相关性不理想,但霾日与年降水酸性呈分段性显著正相关,浮尘污染增加降水酸性。

Probe into the Influencing Factor of Changsha Year Precipitation Acidity

By using Daniel trend test,methods such as factor analysis,analysis of 1986-2010 during the major air pollutant concentrations in Changsha,China SO2 emission characteristics of interannual variation and correlation between years of precipitation acidity in Changsha and the two,while discussion of acids caused by propagation path,also may have implications on the analysis of the relationship between meteorological elements,with a view to exploring rain forecast provides forecast factor.Get 4 conclusion: Changsha year precipitation acidity render a clear "pulsating" change,acid rain,nature had been converted to sulphuric acid and nitric acid hybrid;The rain acidity and not local SO2 Drop concentration to fall,yet does not explain the emission of acid pollutants caused by local surface layer is formed the main causes of acid rain;China’s large range SO2 Emissions close to years of precipitation acidity;Effect of Changsha year precipitation acidity mainly caused by emissions of acid substances from all over the world,which play an important role in Southwest China,southern China’s emissions;Selected meteorological factors of relevance is not ideal,but the haze in days and years of precipitation acidity is segmentation of the significant positive correlation,increased precipitation acidity of dust pollution.