Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Spatial Distributions of On-road Ultrafine Particle Number Concentration on Naebu Express Way in Seoul during Winter Season

겨울철 서울 내부순환로 도로상 초미세입자 오염의 공간분포 특징

  • Woo, Daekwang (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology) ;
  • Lee, Seung-Bok (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology) ;
  • Lee, Seung Jae (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology) ;
  • Kim, Jin Young (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology) ;
  • Jin, Hyun Chul (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology) ;
  • Kim, Taesung (Department of Mechanical Engineering, Sungkyunkwan University) ;
  • Bae, Gwi-Nam (Center for Environment, Health and Welfare Research, Korea Institute of Science and Technology)
  • 우대광 (한국과학기술연구원 환경복지연구단) ;
  • 이승복 (한국과학기술연구원 환경복지연구단) ;
  • 이승재 (한국과학기술연구원 환경복지연구단) ;
  • 김진영 (한국과학기술연구원 환경복지연구단) ;
  • 진현철 (한국과학기술연구원 환경복지연구단) ;
  • 김태성 (성균관대학교 기계공학부) ;
  • 배귀남 (한국과학기술연구원 환경복지연구단)
  • Received : 2012.09.08
  • Accepted : 2012.12.04
  • Published : 2013.02.28
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Abstract

To understand the traffic emissions with high temporal and spatial resolutions on road, a mobile laboratory was developed. The objective of this study is to characterize on-road air pollution on Naebu express way surrounding the northern area of Seoul, Korea. We measured the number concentration of ultrafine particles larger than 5 nm and particle size distribution using a condensation particle counter and a fast mobility particle sizer, respectively on 3, 7, and 8 December 2009. The average ultrafine particle number concentration on the Naebu express way excluding tunnels was 126,000 particles/$cm^3$ and 4.2 times higher than that on internal road at Korea Institute of Science and Technology in Seoul, and more than twice higher than that measured on and at the arterial roads of Seoul in previous studies. The maximum ultrafine particle number concentration was observed at the tunnel sections. It was 232,000 particles/$cm^3$ and 1.8 times higher than average ultrafine particle number concentration for the other sections on Naebu express way. The ultrafine particle number concentration on the wider roads with higher traffic volume along the Han River was similar to that in the residential section, probably because of enhanced dilution effect in widely open environment. The size distribution of particles on the Naebu express way was highly fluctuated for a short duration. Ultrafine particles measured at the tunnel showed a bimodal size distribution with mode diameters of ~10 nm and ~50 nm. At the Han riverside section, ~10 nm particles appeared significantly compared with size distribution at the tunnel. This on-road measurement approach can be utilized to manage vehicle-related air pollution in urban area.

Keywords

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