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. Rept. for Jan 85-Jan 91

Technical Report · Fri Mar 01 04:00:00 EST 1991

OSTI ID:5528229

Wakamatsu, S; Schere, K L

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.

• Research Organization: Environmental Protection Agency, Research Triangle Park, NC (USA). Atmospheric Research and Exposure Assessment Lab.
• OSTI ID: 5528229
• Report Number(s): PB-91-168401/XAB; EPA--600/3-91/015
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION
AIR POLLUTION MONITORING
AIR QUALITY
ASIA
ATMOSPHERIC CHEMISTRY
CHEMISTRY
DEVELOPED COUNTRIES
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL QUALITY
JAPAN
MATHEMATICAL MODELS
OZONE
PHOTOCHEMICAL OXIDANTS
POLLUTION
SMOG
URBAN AREAS