Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Estimation of surface-level PM2.5 concentration based on MODIS aerosol optical depth over Jeju, Korea

MODIS 자료의 에어로졸의 광학적 두께를 이용한 제주지역의 지표면 PM2.5 농도 추정

  • Kim, Kwanchul (Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology) ;
  • Lee, Dasom (Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology) ;
  • Lee, Kwang-yul (Earth Sciences and Environmental Engineering, Gwangju Institute of Science and Technology) ;
  • Lee, Kwonho (The Department of Atmospheric Environmental Sciences, Gangneung-Wonju National University) ;
  • Noh, Youngmin (International Environmental Research Center, Gwangju Institute of Science and Technology)
  • 김관철 (광주과학기술원 지구환경공학부) ;
  • 이다솜 (광주과학기술원 지구환경공학부) ;
  • 이광열 (광주과학기술원 지구환경공학부) ;
  • 이권호 (강릉원주대학교 대기환경과학과) ;
  • 노영민 (광주과학기술원 국제환경연구소)
  • Received : 2016.06.22
  • Accepted : 2016.08.04
  • Published : 2016.10.31
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Abstract

In this study, correlations between Moderate Resolution Imaging Spectroradiometer (MODIS) derived Aerosol Optical Depth (AOD) values and surface-level $PM_{2.5}$ concentrations at Gosan, Korea have been investigated. For this purpose, data from various instruments, such as satellite, sunphotometer, Optical Particle Counter (OPC), and Micro Pulse Lidar (MPL) on 14-24 October 2009 were used. Direct comparison between sunphotometer measured AOD and surface-level $PM_{2.5}$ concentrations showed a $R^2=0.48$. Since the AERONET L2.0 data has significant number of observations with high AOD values paired to low surface-level $PM_{2.5}$ values, which were believed to be the effect of thin cloud or Asian dust. Correlations between MODIS AOD and $PM_{2.5}$ concentration were increased by screening thin clouds and Asian dust cases by use of aerosol profile data on Micro-Pulse Lidar Network (MPLNet) as $R^2$ > 0.60. Our study clearly demonstrates that satellite derived AOD is a good surrogate for monitoring atmospheric PM concentration.

본 연구는 제주 고산에서 Moderate Resolution Imaging Spectroradiometer(MODIS)로 산출된 Aerosol Optical Depth(AOD)와 지표면 $PM_{2.5}$와의 상관성 연구를 수행하였다. 이를 위해 위성자료, 선포토미터, Optical Particle Counter(OPC), Micro Pulse Lidar(MPL)자료가 사용되었다. 2009년 10월 14일부터 24일까지 고산에서 측정된 선포토미터 L2.0자료와 $PM_{2.5}$ 자료의 초기 상관성 검토에서는 $R^2=0.48$의 상관성을 보였지만 고산에서 측정된 Micro-Pulse Lidar Network(MPLNet)의 에어로졸 수직분포 데이터를 사용하여 옅은 구름이나 황사의 영향을 제거한 후에는 상관성이 개선되어 $R^2=0.60$ 이상의 값이 산출되었다. 이러한 결과는 인공위성 자료로부터 측정된 AOD를 이용하여 대기 미세먼지 감시에 활용할 수 있는 가능성을 확인하여 주었다.

Keywords

References

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