Abstract

Atmospheric particles are εmitted from natural sources such as sea spray, volcanic emissions and yellow sand(or Asian dusts) and from anthropogenic processes such as fossil fuel combustion and industrial emissions. Intensive observation of atmospheric aerosol was conducted in Anmyeon-do in order to investigate the physical and the chemical properties of atmospheric aerosol particles with special emphasis on the effect of Yellow Sand during the spring of 2001. The aerosol samples were collected by Optical Particle Counter(OPC), $PM_{10}$ High Volume Air Sampler(HVAS) and ${\beta}-ray$ $PM_{10}$ sampler. The sampling of $PM_{10}$ has been basically carried out three times a week. The measurement items were mass concentration and chemical composition by $PM_{10}$sampler and particle number concentration by OPC. The aerosol number concentration was also analyzed with the 8 channels(0.30 ${\mu}m$-25 ${\mu}m$) measurement. In general, the variation of total particle number concentration was well agreed with that of mass concentration by ${\beta}-ray$ $PM_{10}$ sampler. The major ion component $PM_{10}$ were $SO_4^{2-}$ and $Ca^{2+}$ with the concentration of severe yellow sand was 8.459 ${\mu}/m^3$ and 10.891 ${\mu}/m^3$, respectively.

Keywords

• yellow sand;
• Optical Particle Counter;
• HVAS;
• ${\beta}-ray$ $PM_{10}$ sampler;
• $SO_4^{2-}$;
• $Ca^{2+}$