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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
02 Nov 2017
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).
Comparisons of spectral aerosol absorption 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, Thomas F. Eck2,3, Brent N. Holben2, Jay Herman2, Robert P. Loughman6, Elena Spinei1,2, Seoung Soo Lee1, Pradeep Khatri7, and Monica Campanelli8 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
6Department of Atmospheric and Planetary Sciences, Hampton University, Hampton, Virginia, USA
7Center for Atmospheric and Oceanic Studies, Graduate School of Science, Tohoku University, Sendai, Japan
8Consiglio Nazionale delle Ricerche (CNR), Institute of Atmospheric Sciences and Climate (ISAC), Rome, Italy
Abstract. Quantifying the aerosol absorption at ultraviolet (UV) wavelengths is important for monitoring air pollution using current (e.g., Aura/OMI) and future (e.g., TROPOMI, TEMPO, GEMS, and Sentinel-4) satellite measurements. Measurements of column atmospheric aerosol absorption (i.e., column effective imaginary refractive index (k), single scattering albedo (SSA), and aerosol absorption optical depth (AAOD)) 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 visible 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 of 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 improves agreement with AMP SSA. The combined AMP inversions allow for separating aerosol and gaseous (NO2 and O3) absorption and provides aerosol retrievals from the shortest UVB (305 nm) through visible to NIR wavelengths (870 nm).

Citation: Mok, J., Krotkov, N. A., Torres, O., Jethva, H., Li, Z., Kim, J., Koo, J.-H., Go, S., Irie, H., Labow, G., Eck, T. F., Holben, B. N., Herman, J., Loughman, R. P., Spinei, E., Lee, S. S., Khatri, P., and Campanelli, M.: Comparisons of spectral aerosol absorption in Seoul, South Korea, Atmos. Meas. Tech. Discuss.,, in review, 2017.
Jungbin Mok et al.
Jungbin Mok et al.
Jungbin Mok et al.


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Short summary
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)...