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Korean Meteorological Society (한국기상학회)
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Classification of Various Severe Hazes and Its Optical Properties in Korea for 2011~2013

2011~2013년 한반도에서 관측된 다양한 연무의 분류 및 광학특성

  • Lee, Kyu-Min (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University) ;
  • Eun, Seung-Hee (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University) ;
  • Kim, Byung-Gon (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University) ;
  • Zhang, Wenting (Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University) ;
  • Park, Jin-Soo (Climate and Air Quality Research Department National Institute of Environmental Research) ;
  • Ahn, Jun-Young (Climate and Air Quality Research Department National Institute of Environmental Research) ;
  • Chung, Kyung-Won (Korea-Latin America Green Convergence Center, Hankook University of Foreign Studies) ;
  • Park, Il-Soo (Korea-Latin America Green Convergence Center, Hankook University of Foreign Studies)
  • 이규민 (강릉원주대학교 대기환경과학과) ;
  • 은승희 (강릉원주대학교 대기환경과학과) ;
  • 김병곤 (강릉원주대학교 대기환경과학과) ;
  • 장문정 (강릉원주대학교 대기환경과학과) ;
  • 박진수 (국립환경과학원 기후대기연구부) ;
  • 안준영 (국립환경과학원 기후대기연구부) ;
  • 정경원 (한국외국어대학교 한.중남미 녹색융합센터) ;
  • 박일수 (한국외국어대학교 한.중남미 녹색융합센터)
  • Received : 2017.04.10
  • Accepted : 2017.06.09
  • Published : 2017.06.30
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Abstract

Korea has recently suffered from severe hazes, largely being long-range transported from China but frequently mixed with domestic pollution. It is important to identify the origin of the frequently-occurring hazes, which is however hard to clearly determine in a quantitative term. In this regard, we suggest a possible classification procedure of various hazes into long-range transported haze (LH), Yellow Sand (YS), and urban haze (UH), based on mass loading of fine particles, time lag of PM mass concentrations between two sites aligned with dominant wind direction, backward trajectory of air mass, and the mass ratio of PM2.5 to PM10. The analysis sites are Seoul (SL) and Baengnyeongdo (BN), which are distant about 200 km from each other in the west to east direction. Aerosol concentrations at BN are overall lower than those of SL, indicative of BN being a background site for SL. We found distinct time lag of PM2.5 and PM10 concentrations between BN and SL in case of both LH and YS, but the intensity of YS being stronger than LH. Time scale (e-folding time scale) of LH appears to be longer and more variable than YS, which implies that LH covers much larger spatial scale. In addition, we found linear and significant correlations between ${\tau}_a$ obtained from sunphotometer and ${\tau}_{cal}$ calculated from surface aerosol scattering coefficient for LH episodes, relative to few correlation between those for YS, which might be associated with transported height of YS being much higher than LH. Therefore surface PM concentrations for the YS period are thought to be not representative for vertical integrated amount of aerosol loadings, probably by virtue of decoupled structure of aerosol vertical distribution. Improvement of various hazes classification based on the current result would provide the public as well as researchers with more accurate information of LH, UH, and YS, in terms of temporal scale, size, vertical distribution of aerosols, etc.

Keywords

References

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