摘要：为了获取西北戈壁地区气溶胶随着粒径变化的概率分布函数,对该地区的2次现场取样进行调查。结果表明,采样点气溶胶的质量浓度为0.030.1 mg/m3;气溶胶的粒径分布遵循双峰分布的规律,第1个峰值出现在约0.5μm处,第2个峰值出现在约3μm处,其差异主要表现在第2个峰值的面积大小;大多数采样点气溶胶粒子数量中位粒径小于1μm,质量中位粒径位于25μm之间。
关键词：戈壁地区；气溶胶；质量浓度；粒度分布
Abstract：To obtain the aerosols distribution as a function of aerodynamic diameter at different points in gobi area of northwestern China,the corresponding count and mass median diameter were calculated.The results indicate that the mass concentration of aerosols in sampling points is between 0.03 and 0.1 mg/m3.The size distribution of aerosols has 2 peaks that the first locates at about 0.05 μm and the second at about 3 μm.The difference of the size distribution at different points is mainly shown as the difference of the second peak area.Most count median diameter of samples is smaller than 1 μm,and the mass median diameter is locating between 2 and 5 μm.
Keywords：gobi area;aerosol;mass concentration;particle size distribution
