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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 |
Appears in Collections: | Journal/Magazine Article |
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