Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Characteristics of long-term behavior of VOC species in Korea - PAMS data analysis

우리나라 휘발성유기화합물 화학종의 장기 거동 특성 - 광화학오염물질 측정자료 분석

  • Park, Ji Hoon (Department of Environmental Engineering, Inha University) ;
  • Kang, Soyoung (Climate and Air Quality Research Department, National Institute of Environmental Research) ;
  • Song, In-Ho (Department of Environmental Engineering, Inha University) ;
  • Lee, Dong-Won (Climate and Air Quality Research Department, National Institute of Environmental Research) ;
  • Cho, SeogYeon (Department of Environmental Engineering, Inha University)
  • 박지훈 (인하대학교 공과대학 환경공학과) ;
  • 강소영 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 송인호 (인하대학교 공과대학 환경공학과) ;
  • 이동원 (국립환경과학원 기후대기연구부 대기환경연구과) ;
  • 조석연 (인하대학교 공과대학 환경공학과)
  • Received : 2017.12.20
  • Accepted : 2018.01.25
  • Published : 2018.02.28
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Abstract

Korean Photochemical Assessment Monitoring Stations (PAMS) have been established since the late 2001 to monitor ambient air concentrations of VOC species, which would enhance understanding photo-chemical formation of ozone and subsequently contribute to developing efficient ozone control strategies. The present study aims at identifying major VOC species and examining their trends by analyzing PAMS monitoring data collected from the year 2006 to 2016. All the 18 PAMS sites operated by the Ministry of Environment were included in the study. PAMS monitored the 56 target VOC species, which are classified into four groups, alkenes, lower alkanes ($C{\leq}3$), higher alkanes ($C{\geq}4$), aromatics. The higher alkanes and aromatics dominated over the lower alkanes and alkenes in the type 2 and 3 PAMS sites except Joongheung site. N-butane was a major alkane species, toluene was a major aromatic species and most of VOCs showed decreasing trends in these sites. On the other hand, only the alkenes showed decreasing trends at the Joongheung site in Yeosu. Major sources of abundant species such as ethane, propane, n-butane, toluene were estimated by analyzing seasonal variations, correlation with other VOC species, and emission profiles. A major source of n-butane was identified as LPG cars, while major sources of toluene varied considerably from one site to another. The lower alkanes were composed of ethane and propane, both of which showed a strong seasonal variation, low in the summer and high in the winter, indicating that a major source might be the heating by gaseous fuels. Ozone formation potentials of VOC species were evaluated by applying MIR and POCP to the measured VOC species concentrations. Toluene contributed the most to total ozone forming potentials followed by m,p-xylene for all the type 2 and 3 PAMS sites except for two sites in Yeosu-Gwangyang. Ethylene and propylene were the first and second contributors to total ozone forming potentials at Joongheung site in Yeosu.

Keywords

References

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