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Volume 11, issue 4 | Copyright

Special issue: SKYNET – the international network for aerosol, clouds,...

Atmos. Meas. Tech., 11, 2295-2311, 2018
https://doi.org/10.5194/amt-11-2295-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 23 Apr 2018

Research article | 23 Apr 2018

Comparisons of spectral aerosol single scattering albedo in Seoul, South Korea

Jungbin Mok1,2, Nickolay A. Krotkov2, Omar Torres2, Hiren Jethva2,3, Zhanqing Li1, Jhoon Kim4, Ja-Ho Koo4, Sujung Go4, Hitoshi Irie5, Gordon Labow2,6, Thomas F. Eck2,3, Brent N. Holben2, Jay Herman2,7, Robert P. Loughman8, Elena Spinei1,2, Seoung Soo Lee1, Pradeep Khatri9, and Monica Campanelli10 Jungbin Mok et al.
  • 1Earth System Science Interdisciplinary Center (ESSIC), College Park, Maryland, USA
  • 2NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
  • 3Universities Space Research Association, Columbia, Maryland, USA
  • 4Institute of Earth, Astronomy, and Atmosphere, Brain Korea 21 Program, Department of Atmospheric Sciences, Yonsei University, Seoul, Republic of Korea
  • 5Center for Environmental Remote Sensing, Chiba University, Chiba, Japan
  • 6Science Systems and Applications, Inc., Lanham, Maryland, USA
  • 7Joint Center for Earth Systems Technology Center, University of Maryland Baltimore County, Catonsville, Maryland, USA
  • 8Department of Atmospheric and Planetary Sciences, Hampton University, Hampton, Virginia, USA
  • 9Center for Atmospheric and Oceanic Studies, Graduate School of Science, Tohoku University, Sendai, Japan
  • 10Consiglio Nazionale delle Ricerche (CNR), Institute of Atmospheric Sciences and Climate (ISAC), Rome, Italy

Abstract. Quantifying aerosol absorption at ultraviolet (UV) wavelengths is important for monitoring air pollution and aerosol amounts using current (e.g., Aura/OMI) and future (e.g., TROPOMI, TEMPO, GEMS, and Sentinel-4) satellite measurements. Measurements of column average atmospheric aerosol single scattering albedo (SSA) are performed on the ground by the NASA AERONET in the visible (VIS) and near-infrared (NIR) wavelengths and in the UV-VIS-NIR by the SKYNET networks. Previous comparison studies have focused on VIS and NIR wavelengths due to the lack of co-incident measurements of aerosol and gaseous absorption properties in the UV. This study compares the SKYNET-retrieved SSA in the UV with the SSA derived from a combination of AERONET, MFRSR, and Pandora (AMP) retrievals in Seoul, South Korea, in spring and summer 2016. The results show that the spectrally invariant surface albedo assumed in the SKYNET SSA retrievals leads to underestimated SSA compared to AMP values at near UV wavelengths. Re-processed SKYNET inversions using spectrally varying surface albedo, consistent with the AERONET retrieval improve agreement with AMP SSA. The combined AMP inversions allow for separating aerosol and gaseous (NO2 and O3) absorption and provide aerosol retrievals from the shortest UVB (305nm) through VIS to NIR wavelengths (870nm).

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Measuring aerosol absorption from the shortest ultraviolet (UV) to the near-infrared (NIR) wavelengths is important for studies of climate, tropospheric photochemistry, human health, and agricultural productivity. We estimate the accuracy and demonstrate consistency of aerosol absorption retrievals from different instruments, after accounting for spectrally varying surface albedo and gaseous absorption.
Measuring aerosol absorption from the shortest ultraviolet (UV) to the near-infrared (NIR)...
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