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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
Citation:
Wakamatsu, S. AND K. Schere. 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. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/3-91/015 (NTIS PB91168401).
Description:
The purpose of this 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. mphasis was placed on the photochemical smog formation mechanism under stagnant meteorological conditions. he UAM produced reasonable calculated results for the diurnal, areal and vertical distributions of O3 concentrations covering the Tokyo Metropolitan Area. he role and significance of the previous day's secondary pollutants on O3 formation mechanisms were also investigated. uring the night time, high values of secondary pollutant concentrations were predicted above the radiation inversion layer. hese aged pollutants were then entrained into the mixing layer during the day in accordance with the elevation of the lid. hese characteristic features were also observed in the field study.