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Utilization of O4 Slant Column Density to Derive Aerosol Layer Height from a Space-Borne UV-Visible Hyperspectral Sensor: Sensitivity and Case StudyThe sensitivities of oxygen-dimer (O4) slant column densities (SCDs) to changes in aerosol layer height are investigated using the simulated radiances by a radiative transfer model, the linearized pseudo-spherical vector discrete ordinate radiative transfer (VLIDORT), and the differential optical absorption spectroscopy (DOAS) technique. The sensitivities of the O4 index (O4I), which is defined as dividing O4 SCD by 10(sup 40) molecules (sup 2) per centimeters(sup -5), to aerosol types and optical properties are also evaluated and compared. Among the O4 absorption bands at 340, 360, 380, and 477 nanometers, the O4 absorption band at 477 nanometers is found to be the most suitable to retrieve the aerosol effective height. However, the O4I at 477 nanometers is significantly influenced not only by the aerosol layer effective height but also by aerosol vertical profiles, optical properties including single scattering albedo (SSA), aerosol optical depth (AOD), particle size, and surface albedo. Overall, the error of the retrieved aerosol effective height is estimated to be 1276, 846, and 739 meters for dust, non-absorbing, and absorbing aerosol, respectively, assuming knowledge on the aerosol vertical distribution shape. Using radiance data from the Ozone Monitoring Instrument (OMI), a new algorithm is developed to derive the aerosol effective height over East Asia after the determination of the aerosol type and AOD from the MODerate resolution Imaging Spectroradiometer (MODIS). About 80 percent of retrieved aerosol effective heights are within the error range of 1 kilometer compared to those obtained from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) measurements on thick aerosol layer cases.
Document ID
20160004974
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Park, Sang Seo
(Yonsei Univ. Seoul, Korea, Republic of)
Kim, Jhoon
(Yonsei Univ. Seoul, Korea, Republic of)
Lee, Hanlim
(Yonsei Univ. Seoul, Korea, Republic of)
Torres, Omar
(NASA Goddard Space Flight Center Greenbelt, MD United States)
Lee, Kwang-Mog
(Kyungpook National Univ. Daegu, Korea, Republic of)
Lee, Sang Deok
(National Institute of Environmental Research Incheon, Korea, Republic of)
Date Acquired
April 11, 2016
Publication Date
February 23, 2016
Publication Information
Publication: Atmospheric Chemistry and Physics
Publisher: Atmospheric Chemstry and Physics
Volume: 16
Issue: 4
e-ISSN: 1680-7324
Subject Category
Geophysics
Report/Patent Number
GSFC-E-DAA-TN31185
Distribution Limits
Public
Copyright
Other
Keywords
Air Pollution
Atmospheric Chemistry
Aerosols

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