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研究论文

摘要：利用一个硫沉降模式分析了东亚地区SO₂和SO₄^2-浓度的空间分布及其特征。不同天气条件下,SO₂和SO₄^2-的浓度不同,高层SO₂和SO₄^2-的浓度分别为0.4-1.0μg/m³和0.2-0.5μg/m³;中层为4.0-10.0μg/m³和2.0-6.0μg/m³;近地层为4.0-30.0μg/m³和2.0-8.0μg/m³.分析表明,近地面浓度分布受源的影响比较明显,高层的浓度分布与湿清除过程密切相关,其浓度的低值区与降水区和云区有较好的对应。中层浓度分布体现了源、中层气流及湿清除的共同作用。

Abstract：The distributions of SO₂ and SO₄^2- in Ease Asia were studied using a sulfur deposition model. It is revealed that the distributions of SO₂ and SO₄^2- are different under different meteorological conditions. The concentrations of SO₂ and SO₄^2- are 0.4-1.0μg/m³ and 0.2-0.5μg/m³ in the upper layer and are 4.0-10.0μg/m³ and 2.0-6.0μg/m³ in the middle layer. In the surface layer, the levels of SO₂ and SO₄^2- range from 4.0-30.0μg/m³ and 2.0-8.0μg/m³. Distribution of SO_x is controlled by emissions in the surface layer while in upper layer, it is affected by proecipitation. The distributions of SO_x show the interaction of emissions, winds and precipitation in the middle layer.