Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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A Preliminary PAM Measurement of Ambient Air at Gosan, Jeju to Study the Secondary Aerosol Forming Potential

이차 에어러솔 생성 잠재력 평가를 위한 Potential Aerosol Mass (PAM) 챔버의 제주도 고산 대기분석 적용

  • Kang, Eun-Ha (Department of Earth and Environmental Sciences, Korea University) ;
  • Brune, William H. (Department of Meteorology, The Pennsylvania State University) ;
  • Kim, Sang-Woo (School of Earth and Environmental Sciences, Seoul National University) ;
  • Yoon, Soon-Chang (School of Earth and Environmental Sciences, Seoul National University) ;
  • Jung, Mu-Hyun (Department of Earth and Environmental Sciences, Korea University) ;
  • Lee, Mee-Hye (Department of Earth and Environmental Sciences, Korea University)
  • 강은하 (고려대학교 지구환경과학과) ;
  • ;
  • 김상우 (서울대학교 지구환경과학부) ;
  • 윤순창 (서울대학교 지구환경과학부) ;
  • 정무현 (고려대학교 지구환경과학과) ;
  • 이미혜 (고려대학교 지구환경과학과)
  • Received : 2011.04.25
  • Accepted : 2011.08.16
  • Published : 2011.10.31
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Abstract

The secondary aerosol forming potential of ambient air was first measured with the Potential Aerosol Mass(PAM) chamber at Gosan supersite on Jeju island from October 22 to November 5, 2010. PAM chamber is a small flowthrough photo-oxidation chamber with extremely high OH and $O_3$ levels. The OH exposure in the PAM chamber was $(2{\pm}0.4){\times}10^{11}{\sim}(6{\pm}1.2){\times}10^{11}$ molecules $cm^{-3}$ s and was similar to 2 to 5 days of aging in the atmosphere. By periodically turning on and off UV lamps in the PAM chamber, ambient aerosol and newly formed aerosol (e.g. called as PAM aerosol) was alternately measured. Aerosol number and mass concentration in the range of 10~487 nm in diameter was measured by SMPS 3034. With UV lamps on, the nucleation mode particles smaller than 50 nm in diameters were formed. Their number concentration was greater than 105 $cm^{-3}$, leading to increase in aerosol mass by 0~8 ${\mu}gm^{-3}$. The variations of PAM and ambient aerosols were greatly dependent on characteristics of air masses such as precursor concentrations and degree of aging. This preliminary results suggests that PAM chamber is useful to assess the aerosol formation potential of air mass and its impact on the air quality. The further analysis of data with gaseous and particulate measurements will be done.

Keywords

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