Journal of Environmental Health Sciences (한국환경보건학회지)

Korean Society of Environmental Health (한국환경보건학회)
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Time Series Observations of Atmospheric Radon Concentration in Seoul, Korea for an Analysis of Long-Range Transportation of Air Pollutants in the North-East Asia

동북아 오염물질 장거리이동 분석을 위한 서울시 대기 중 라돈농도의 시계열적 특성에 관한 연구

  • Kim, Yoon-Shin (Institute of Environmental and Industrial Medicine, Hanyang University) ;
  • Lee, Cheol-Min (Institute of Environmental and Industrial Medicine, Hanyang University) ;
  • Kim, Ki-Youn (Institute of Environmental and Industrial Medicine, Hanyang University) ;
  • Jeon, Hyung-Jin (Institute of Environmental and Industrial Medicine, Hanyang University) ;
  • Kim, Jong-Cheol (Institute of Environmental and Industrial Medicine, Hanyang University) ;
  • Iida, Takao (Department of Nuclear Engineering, Nagoya University)
  • 김윤신 (한양대학교 환경 및 산업의학연구소) ;
  • 이철민 (한양대학교 환경 및 산업의학연구소) ;
  • 김기연 (한양대학교 환경 및 산업의학연구소) ;
  • 전형진 (한양대학교 환경 및 산업의학연구소) ;
  • 김종철 (한양대학교 환경 및 산업의학연구소) ;
  • Published : 2007.08.30
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Abstract

Atmospheric concentrations of radon had been continuously observed in Seoul, Korea since December 1999, as a tracer for long-range transport of air pollutants from China continent to Korea. In order to study radon as a tracer of long-range transport, it is important to know information about the atmospheric distribution and variation of radon concentration and its time variation. Atmospheric radon concentration are measured with electrostatic radon monitor(ERM) at Hanyang University located in Eastern area of Seoul. Air sample is taken into a vessel of ERM, and alpha particles emitted by radon daughters $Po^{218}$ are detected with ZnS(Ag) scintillation counter. Hourly mean concentrations and hourly alpha counts are recorded automatically. The major results obtained from time series observation of atmospheric radon were as follows : (1) The mean of airborne radon concentration in Seoul was found to be $7.62{\pm}4.11\;Bq/m^3$ during December $1999{\sim}January$ 2002. (2) The hourly variation of radon concentrations showed the highest in 8:00AM ($8.66{\pm}4.22\;Bq/m^3$) and the lowest in 3:00AM ($6.62{\pm}3.70\;Bq/m^3$) and 5:00AM ($6.62{\pm}3.39\;Bq/m^3$). (3) the seasonal variation of radon concentrations showed higher during winter-to-fall and lower during summer-to-spring. (4) Correlation between airborne radon concentration and the meteorological factors were -0.21 for temperature, 0.09 for humidity, -0.20 for wind speed, and 0.04 for pressure. (5) The mean difference of airborne radon concentration between Asian dust ($5.36{\pm}1.28\;Bq/m^3$) and non-Asian dust ($4.95{\pm}1.49\;Bq/m^3$) phenomenon was significant (p=0.08). We could identify time series distribution of radon concentration related meteorological factors. In addition, radon can be considered a good natural tracer of vertical dispersion and long-range transport.

Keywords

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