关键词: 气溶胶粒子, 地面沙尘, 工业排放物, 成分

Abstract: Over the sand-dust source areas in northwestern China,the concentration and the granularity distribution of atmospheric aerosols don't change with height whether during dust-storm or no dust-storm periods.When dust-storms break out sand-dusts on the underlying surface are intensively blew into air and the peak value of the concentration of atmospheric aerosols shifts towards coarser particles.Over Wako of Japan,a sand-dust sedimentary area,the curves of concentration distribution of atmospheric aerosol particles are bimodal during Kosa but unimodal during no Kosa.The former reflects that the atmospheric aerosol particles come from two sources:the continental deposit and the local industrial discharge,and the latter reflects that the atmospheric aerosol particles only come from the local industrial discharge.The water-soluble components of the atmospheric aerosol particles over the sand-dust source areas are predominated by Ca²⁺,SO₄^2-,Na⁺ and Cl^-,but over the sand-dust sedimentary area by NH₄⁺,SO₄^2- and NO₃^-.The water-insoluble components of the atmospheric aerosol particles over the sand-dust source areas are deficient in K and Na,which reveals that the aerosol particles over the sand-dust source areas have undergone the chemical weathering of K,Na stages,this weathering had occurred before forming the atmospheric aerosol particles.Key words:aerosol particles;sand-dust sources;industrial discharge;components

Key words: aerosol particles, sand-dust sources, industrial discharge, components