沙尘和灰霾天气下毛乌素沙漠地区大气气溶胶的光学特征

Aerosol Optical Characteristics in Mu Us Desert Under Weather Conditions of Dust Strom and Haze

利用AERONET榆林站点的数据比较分析了在沙尘和灰霾两种不同天气条件下毛乌素沙漠边缘地区大气气溶胶的光学和物理特性。分析的主要内容包括:气溶胶光学厚度、单次散射反照率、复折射指数、不对称因子、气溶胶粒子的粒度分布、Angstrom波长指数、体积浓度、气溶胶粒子半径等光学和物理参数。分析结果表明,榆林地区大气气溶胶光学特性主要是受到沙尘和人为气溶胶的共同影响。在沙尘天气和灰霾天气下,大气气溶胶的光学特性有显著的差异。

By using data of Yulin station of AERONET, aerosol optical and physical characteristics were analyzed elementarily in Yulin and the Mu Us desert under two different weather conditions of dust storm and haze. The optical and physical characteristics include: atmospheric optical thickness, single scattering albedo, complex refractive exponent, asymmetry factor, size distribution, Angstrom wavelength exponent, volume concentration and radii of aerosol particles. The results show that both dust aerosols and anthropogenic aerosols can contribute to the aerosol optical and physical characteristics in Yunlin and Mu Us desert. And the aerosol optical and physical characteristics are very different under weather conditions of dust storm and haze.