中国硫酸盐气溶胶直接辐射效应性质与地表反射率的关系

Relationship between surface reflectance and direct radiative effect of sulfate aerosols in China

地表反射率是影响硫酸盐气溶胶直接辐射效应的重要参数.本研究在MODIS地表反射率数据和中国二氧化硫排放清单数据的基础上,应用CanMETOP模型和SBDART模型,模拟地表反射率、纬度和直接辐射效应之间的关系,并对中国硫酸盐气溶胶直接辐射效应性质进行分析.结果表明,部分冬季积雪或终年冰雪覆盖的地区,其硫酸盐气溶胶直接辐射效应为正.该研究结果对硫酸盐气溶胶及其气候效应研究具有重要意义.

Surface albedo is one of the most important factors influencing direct radiative effect( DRE) of sulfate aerosols. Based on MODIS surface reflectance products and SO 2 emission inventory,this study investigatedthe relationship between DRE of sulfate aerosols and surface reflectance in China, using CanMETOP,OPAC and SBDART models. It was shown that positive DRE of sulfate aerosols occurs where surface albedo is very high,mostly in winter in snow covered areas of China. The results have important implications for studying sulfate aerosols and their climate effects.