Record Display for the EPA National Library Catalog
RECORD NUMBER: 50 OF 2081
|OLS Field Name||OLS Field Data|
|Main Title||A study using a three dimensional photochemical smog formation model under conditions of complex flow : application of the Urban Airshed Model to the Tokyo Metropolitan Area /|
|Author||Wakamatsu, Shinji. ; Schere, K. L.|
|CORP Author||Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Research and Exposure Assessment Lab. ;National Inst. for Environmental Studies, Ibaraki (Japan).|
|Publisher||United States Environmental Protection Agency, Atmospheric Research and Exposure Assessment Laboratory,|
|Subjects||Air quality--Computer simulation. ; Atmospheric ozone--Computer simulation. ; Air quality--Japan--Tokyo.|
|Additional Subjects||Smog ; Air pollution monitoring ; Atmospheric models ; Urban areas ; Atmospheric chemistry ; Ozone ; Photochemical oxidants ; Graphs(Charts) ; Tables(Data) ; Atmospheric diffusion ; Urban Airshed Model ; Tokyo(Japan)|
|Collation||98 pages ; 28 cm|
The purpose of the study is to evaluate the Urban Airshed Model (UAM), a three-dimensional photochemical urban air quality simulation model, using field observations from the Tokyo Metropolitan Area. Emphasis was placed on the photochemical smog formation mechanism under stagnant meteorological conditions. The UAM produced reasonable calculated results for the diurnal, areal and vertical distributions of O3 concentrations covering the Tokyo Metropolitan Area. The role and significance of the previous day's secondary pollutants on O3 formation mechanisms were also investigated. During the night time, high values of secondary pollutant concentrations were predicted above the radiation inversion layer. These aged pollutants were then entrained into the mixing layer during the day in accordance with the elevation of the lid. These characteristic features were also observed in the field study.
Caption title. "March 1991." "EPA/600/3-91/015." Microfiche.