Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34471
Title: Analytical approach to estimating aerosol extinction and visibility from satellite observations
Authors: Lee, KH
Wong, MS 
Kim, K
Park, SS
Keywords: Aerosol
Extinction
Visibility
Satellite
Analytical model
Issue Date: 2014
Publisher: Pergamon Press
Source: Atmospheric environment, 2014, v. 91, p. 127-136 How to cite?
Journal: Atmospheric environment 
Abstract: This study investigates the application of satellite data to the evaluation of aerosol extinction and visibility, for a better understanding of the spatio-temporal variation of local air quality in urban areas. A new analytical model based on aerosol microphysics and non-linear exponential fitting was applied to the analysis of aerosol extinction using aerosol optical thickness (AOT, τa) data retrieved from the MODerate-resolution Imaging Spectroradiometer (MODIS), over one of the largest global megacities: Seoul, Korea. The relationship between the MODIS τa and ground-based aerosol measurements of particulate matter mass concentration, extinction, and surface visibility was assessed over Seoul, Korea, during eight intensive observation periods in 2007–2009. The results clearly demonstrate that satellite-derived τa is a good surrogate for monitoring aerosol extinction and visibility over this study area. In particular, it is found that MODIS-estimated visibility values have a closer relation to the observed values than traditionally assumed Koschemeider's relation. The analytical results shown in this study can provide a better understanding of aerosol extinction and visibility in megacity, as well as for routine visibility monitoring.
URI: http://hdl.handle.net/10397/34471
ISSN: 1352-2310
EISSN: 1873-2844
DOI: 10.1016/j.atmosenv.2014.03.050
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