Abstract for presentation at 14th IUAPPA World Congress

Chemical Characteristics of Long-range Transport of Aerosol at Background Sites in Korea

  • Prof Young Sunwoo, Konkuk University, Korea
  • Yoo Jung Kim, Konkuk University, Korea
  • Young-Il Ma, Konkuk University, Korea
  • Jung-Sik Nam, Konkuk University, Korea
  • Su Hyang Kim, Konkuk University, Korea
  • Hye Min Kim, Konkuk University, Korea
  • Ha Kyoung Sung, Konkuk University, Korea
  • Chang-Hee Kang, Cheju National University, Korea, Democratic People's Rep
  • Jun-Seok Cha, National Institute of Environmental Research, Korea

    • Deokjeok and Gosan are typical background concentration sites in Korea. Located, respectively, on the western sea and southern sea of Korea, these sites are suitable for monitoring the impact of long-range transport of air pollutants, especially from China. For this research, Teflon filter packs connected to cyclones with cutoff diameters of 2.5 α and 10α were used for sampling aerosol. PM2.5 and PM10 were monitored for mass concentrations and analysed for chemical composition during the intensive monitoring periods, October 15~24 in 2005, January 5~19, April 1~15, June 6~15, October 15~25 in 2006 and January 11~20 in 2007. Mass, ion, metal, sulfur and carbon data were analysed.
    The PM2.5 and PM10 mean mass concentrations at Deokjeok were higher than that of Gosan. During the episodic sampling period, the daily variation of PM2.5 and PM10 were similar at both sites. Chemical composition analyses of aerosol showed that sulfate was the most dominant anion and ammonium was the most abundant cation at both sites. The concentration of nitrate was high at Deokjeok, but not at Gosan. The frequency of back-trajectories originating from north and east China was relatively high and, in these cases, the concentrations of almost all chemical elements were higher than other cases. It seems that the impact of anthropogenic sources at Deokjeok is stronger than Gosan, and, in general, long-range transport from China dominates local impact. From receptor model(PMF) results, the primary source category is secondary aerosol at both sites.
    Keywords : aerosol, background concentration, PMF

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