东亚地区的硫沉降特征分析

利用一个硫沉降模式讨论了东亚地区的硫沉降特征。大多数地区,干沉降是硫沉降的主要形式,在降水区,湿沉降可占总沉降的20%~95%。干沉降以SO₂的沉降为主,SO₂的干沉降占总干沉降的70%~90%。降水引起的湿沉降主要是SO₄2-的沉降,SO₄2-的湿沉降量一般为SO₂湿沉降量的1~9倍。干沉降与排放量之比的大值区与排放的大值区相对应,但其中心与排放的大值中心不重合,而是在其附近。 

A Study on Sulfur Deposition Features in East Asia

Features of sulfure deposition in East Asia are studied using an Eulerian Sulfur Deposition Model.In most of simulated areas,dry deposition contributes to most of the total deposition,while in the areas of precipitation,wet deposition is 20%~95% of the total deposition.Dry deposition of SO₂ is 70%~90% of the total dry deposition and wet deposition of SO₄^2- is 1~9 times higher than wet deposition of SO₂.The areas with great ratios of dry deposition to emission correspond to those with big values of emission.