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Characteristics of Carbonaceous and Organic Components in PM2.5 over the Yellow Sea

서해상 PM2.5 내 탄소성분 및 유기성분의 화학적 특성

  • Yoo, Ha Young (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Kim, Ki Ae (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • An, Hyunjin (Department of Earth and Environmental Sciences, Korea University) ;
  • Lee, Yeonjung (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Zihui, Teng (Department of Environmental Science and Engineering, Ewha Womans University) ;
  • Yoo, Hee-Jung (Innovative Meteorological Research Department, National Institute of Meteorological Sciences) ;
  • Kim, Jeong Eun (Innovative Meteorological Research Department, National Institute of Meteorological Sciences) ;
  • Ko, Hee-Jung (Innovative Meteorological Research Department, National Institute of Meteorological Sciences) ;
  • Sung, Min-Young (Air Quality Research Division, Climate and Air Quality Research Department, National Institute of Environmental Research) ;
  • Choi, Jin-Soo (Air Quality Research Division, Climate and Air Quality Research Department, National Institute of Environmental Research) ;
  • Park, Jin-Soo (Air Quality Research Division, Climate and Air Quality Research Department, National Institute of Environmental Research) ;
  • Lee, Ji Yi (Department of Environmental Science and Engineering, Ewha Womans University)
  • 유하영 (이화여자대학교 환경공학과) ;
  • 김기애 (이화여자대학교 환경공학과) ;
  • 안현진 (고려대학교 지구환경과학과) ;
  • 이연정 (이화여자대학교 환경공학과) ;
  • ;
  • 유희정 (국립기상과학원 미래기반연구부) ;
  • 김정은 (국립기상과학원 미래기반연구부) ;
  • 고희정 (국립기상과학원 미래기반연구부) ;
  • 성민영 (국립환경과학원 대기환경연구과) ;
  • 최진수 (국립환경과학원 대기환경연구과) ;
  • 박진수 (국립환경과학원 대기환경연구과) ;
  • 이지이 (이화여자대학교 환경공학과)
  • Received : 2021.03.29
  • Accepted : 2021.07.06
  • Published : 2021.09.30

Abstract

Characteristics of carbonaceous components and organic compounds in PM2.5 over the atmosphere of the Yellow Sea were investigated. PM2.5 samples were collected onboard the meteorological research vessel, GISANG 1, over the Yellow Sea during the YES-AQ campaign in 2018 and 2019, respectively. The average concentrations of carbonaceous components in this region were 2.59 ± 1.59 ㎍ m-3 for the OC, 0.24 ± 0.10 ㎍ m-3 for the EC, 2.14 ± 1.30 ㎍ m-3 for the WSOC and 1.17 ± 0.94 ㎍ m-3 for the HULIS-C, respectively. The total concentration of 56 organic compounds (ΣOCs) accounts for 10% of OC. The main group among organic compounds were dicarboxylic acids which account for 57% of ΣOCs, followed by n-alkanoic acids accounting for 34% of ΣOCs. In n-alkanoic acid distribution, hexanoic (C6:0) and octanoic (C8:0) acids which are low molecular weight n-alkanoic acids and known as emitted from marine biogenic activities were dominant in this region. Furthermore, non-HULIS-C fraction increased when the air mass originated from the marine region rather than the continental region. When the Asian dust episode was observed, the WISOC concentrations along with the levoglucosan were increased, while the haze episodes caused the increase of WSOC, HULIC-S and DCAs. In this study, we found that the components of carbonaceous and organic aerosols in PM2.5 over the Yellow Sea were changed with the specific air pollution episodes. It indicates that the physicochemical properties of PM2.5 can be changed by the air pollution episodes in this region.

Keywords

Acknowledgement

이 연구는 기상청 국립기상과학원 '황사·연무 감시 및 예보기술 개발(KMA2018-00521)' 및 국립환경과학원 '입체관측을 통한 유기미세입자 및 주요 2차 입자상 물질의 국가 간 이동파악(NIER-RP2019-152)'의 지원을 받아 수행된 연구입니다.

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