Observation and Analysis of Mass Concentration of Dust and Sand Aerosol in Spring in Helanshan Area

Aerosol mass concentrations were obtained under different weather conditions including atmospheric background, dust, sand blowing and dust storm, and there are largelg differences for averaged aerosd mass concentraions under above four kinds of different dust and sand weather conditions. On the average, the aerosol mass concentrations of dust weather is 3.54 times larger than that of atmospheric background; of sand blowing, 2.95 times larger than that of dust; of dust storm, 2.68 times larger than that of sand blowing. The sand aerosol mass concentrations of background in the Helan Mountain vary from 76.0 to 142.4 μg·m\+\{-3\} in spring, and also the average value in desert area is more than the value in Yinchuan 20%. Furthermore, the mass concentrations between Anderson and KB-120E are different .