Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Urban Aerosol Number Concentration and Scattering Coefficient in Seoul, Korea, during Winter

서울지역 겨울철 대기 에어로졸의 수 농도 및 산란계수 분석

  • Lee, Hyun-Hye (Global Environment Center, Korea Institute of Science and Technology) ;
  • Kim, Jin Young (Global Environment Center, Korea Institute of Science and Technology) ;
  • Lee, Seung-Bok (Global Environment Center, Korea Institute of Science and Technology) ;
  • Bae, Gwi-Nam (Global Environment Center, Korea Institute of Science and Technology) ;
  • Yum, Seong Soo (Department of Atmospheric Sciences, Yonsei University)
  • 이현혜 (한국과학기술연구원 지구환경센터) ;
  • 김진영 (한국과학기술연구원 지구환경센터) ;
  • 이승복 (한국과학기술연구원 지구환경센터) ;
  • 배귀남 (한국과학기술연구원 지구환경센터) ;
  • 염성수 (연세대학교 대기과학과)
  • Received : 2010.06.08
  • Accepted : 2010.06.29
  • Published : 2010.06.30
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Abstract

Size-segregated number concentration and scattering coefficient of urban aerosols were measured using an SMPS (scanning mobility particle sizer) and a nephelometer, respectively in Seoul, Korea, during the winter season of 2003. The average number concentrations of ultrafine particles (20~100 nm) and accumulation mode particles (100~600 nm) were $2,170\;particles\;cm^{-3}$ and $1,521\;particles\;cm^{-3}$, respectively. The scattering coefficient at the wavelength of 550 nm ranged from $62.6Mm^{-1}$ to $330.1Mm^{-1}$ and average value was $163.4Mm^{-1}$. The peak concentrations of ultrafine particles and accumulation mode particles were simultaneously recorded between 6:00 and 9:00 A.M., indicating the effect of vehicle emissions which are major air pollution sources in the urban atmosphere. On average, the number concentration of ultrafine particles was 1.4 times higher than that of accumulation mode particles, although it was a little higher during the morning peak time. The variation of aerosol scattering coefficient was in good agreement with that of accumulation mode particle number concentration rather than that of ultrafine particle number concentration.g coefficient was in good agreement with that of accumulation mode particle number concentration rather than that of ultrafine particle number concentration.

Keywords

Acknowledgement

Supported by : 환경부

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