Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Corrections and Artifacts Regarding Filter-based Measurements of Black Carbon

필터 기반 블랙카본 측정에서의 보정과 불확실성에 대한 고찰

  • Lee, Jeonghoon (School of Mechanical Engineering, Korea University of Technology and Education)
  • 이정훈 (한국기술교육대학교 기계공학부)
  • Received : 2018.08.06
  • Accepted : 2018.08.10
  • Published : 2018.08.31
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Abstract

A filter-based optical technique is one of the representative ways for the measurement and quantification of black carbon (BC). Since the filter-based technique adopts a simple principle, it is easy to put into practical use and instrumental products have already been commercialized. In this study, however, the absorption coefficients of BC after the correction process was estimated to be approximately 3 times lower than those before the correction process. In addition, the difference between before and after corrections was also evident for the trend of increasing and decreasing absorption coefficient. When BC concentration is low, uncertainty may increase regardless of corrections due to the artifacts of filter. In this sense, techniques without using a filter are required, and uncertainties will be minimized if these techniques are used to further complement the filter-based black carbon measurements. Finally, this study is believed to help understand the uncertainty and correction of filter-based black carbon measurements.

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References

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