[Analysis on chemical and physical properties of Beijing super dust storm in spring of 2004]

On March 27, 2004 a super dust storm occurred in Beijing. The concentration of the aerosol and the element concentration of the aerosol were analyzed. The velocity of wind and radiation of ground were also measured. TSP increased 300 - 400 percent. PM2.5 increased 200 - 300 percent, but the concentration of the fine particle decreased. The elements like Na, Mg, Al, Mn and Fe mainly distribute in coarse particles. The contaminated elements such as Zn and Pb mainly distribute in fine particles. The contaminated elements mainly come from local source. The total radiation reduced 37.8 percent. With the increased of the velocity of the wind, the concentration of the coarse particle increased notability, the concentration of the fine particle decreased.