A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Analytical approach to estimating aerosol extinction and visibility from satellite observations
https://orcid.org/0000-0002-0844-5245
https://orcid.org/0000-0002-6439-6775
https://orcid.org/0000-0002-7397-9534
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, τ a) data retrieved from the MODerate-resolution Imaging Spectroradiometer (MODIS), over one of the largest global megacities: Seoul, Korea. The relationship between the MODIS τ a 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 τ a 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.
Highlights A new analytic model for aerosol extinction retrieval from satellite is proposed. The possibility of establishing satellite derived AOT to retrieve visibility data in a local scale. Performance of the method shows a better understanding of aerosol extinction and visibility monitoring in mega-city.
Analytical approach to estimating aerosol extinction and visibility from satellite observations
https://orcid.org/0000-0002-0844-5245
https://orcid.org/0000-0002-6439-6775
https://orcid.org/0000-0002-7397-9534
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, τ a) data retrieved from the MODerate-resolution Imaging Spectroradiometer (MODIS), over one of the largest global megacities: Seoul, Korea. The relationship between the MODIS τ a 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 τ a 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.
Highlights A new analytic model for aerosol extinction retrieval from satellite is proposed. The possibility of establishing satellite derived AOT to retrieve visibility data in a local scale. Performance of the method shows a better understanding of aerosol extinction and visibility monitoring in mega-city.
Analytical approach to estimating aerosol extinction and visibility from satellite observations
https://orcid.org/0000-0002-0844-5245
https://orcid.org/0000-0002-6439-6775
https://orcid.org/0000-0002-7397-9534
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, τ a) data retrieved from the MODerate-resolution Imaging Spectroradiometer (MODIS), over one of the largest global megacities: Seoul, Korea. The relationship between the MODIS τ a 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 τ a 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.
Highlights A new analytic model for aerosol extinction retrieval from satellite is proposed. The possibility of establishing satellite derived AOT to retrieve visibility data in a local scale. Performance of the method shows a better understanding of aerosol extinction and visibility monitoring in mega-city.
Analytical approach to estimating aerosol extinction and visibility from satellite observations
Lee, Kwon Ho (author) / Wong, Man Sing (author) / Kim, Kyungwon (author) / Park, Seung Shik (author)
Atmospheric Environment ; 91 ; 127-136
2014-03-24
10 pages
Article (Journal)
Electronic Resource
English
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