Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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A Study on the Variation of Aerosol Optical Depth according to Aerosol Types in Northeast Asia using Aeronet Sun/Sky Radiometer Data

AERONET 선포토미터 데이터를 이용한 동북아시아 지역 대기 에어로졸 종류별 광학적 농도 변화 특성 연구

  • Noh, Youngmin (Department of Environmental Engineering, Pukyong National University)
  • 노영민 (국립부경대학교 환경공학과)
  • Received : 2018.08.23
  • Accepted : 2018.10.06
  • Published : 2018.10.31
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Abstract

This study has developed a technique to divide the aerosol optical depth of the entire aerosol (${\tau}_{total}$) into the dust optical depth (${\tau}_D$) and the pollution particle optical depth (${\tau}_P$) using the AERONET sun/sky radiometer data provided in Version 3. This method was applied to the analysis of AERONET data observed from 2006 to 2016 in Beijing, China, Seoul and Gosan, Korea and Osaka, Japan and the aerosol optical depth trends of different types of atmospheric aerosols in Northeast Asia were analyzed. The annual variation of ${\tau}_{total}$ showed a tendency to decrease except for Seoul where observation data were limited. However, ${\tau}_D$ tended to decrease when ${\tau}_{total}$ were separated as ${\tau}_D$ and ${\tau}_P$, but ${\tau}_P$ tended to increase except for Osaka. This is because the concentration of airborne aerosols, represented by Asian dust in Northeast Asia, is decreased in both mass concentration and optical concentration. However, even though the mass concentration of pollution particles generated by human activity tends to decrease, Which means that the optical concentration represented as aerosol optical depth is increasing in Northeast Asia.

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References

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