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Study of Retrieving the Aerosol Size Distribution from Aerosol Optical Depths

에어로졸 광학깊이를 이용한 에어로졸 크기분포 추출 연구

  • Kim, Dukhyeon (School of Basic Science, Hanbat National University)
  • 김덕현 (한밭대학교 기초과학부)
  • Received : 2018.06.05
  • Accepted : 2018.07.06
  • Published : 2018.08.25

Abstract

In this study, aerosol size distributions were retrieved from aerosol optical depth measured over a range of 10 wavelengths from 250 to 1100 nm. The 10 wavelengths were selected where there is no absorption of atmospheric gases. To obtain the solar spectrum, a home-made solar tracking system was developed and calibrated. Using this solar tracking system, total optical depths (TODs) were extracted for the 10 wavelengths using the Langley plot method, and aerosol optical depths (AODs) were obtained after removing the effects of gas absorption and Rayleigh scattering from the TODs. The algorithm for retrieving aerosol size distributions was suggested by assuming a bimodal aerosol size distribution. Aerosol size distributions were retrieved and compared under various arbitrary atmospheric conditions. Finally, we found that our solar tracking spectrometer is useful for retrieving the aerosol size distribution, even though we have little information about the aerosol's refractive index.

Acknowledgement

Supported by : 기상청

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