Title: Air quality model simulating photochemical formation of pollutants: the Sao Paulo Metropolitan Area, Brazil

Authors: Maria De Fatima Andrade, Rita Y. Ynoue, Robert Harley, Antonio H. Miguel

Addresses: Department of Atmospheric Sciences, Institute of Astronomy, Geophysics, and Atmospheric Sciences, University of Sao Paulo, Sao Paulo, 05508-900, Brazil. ' Department of Atmospheric Sciences, Institute of Astronomy, Geophysics, and Atmospheric Sciences, University of Sao Paulo, Sao Paulo, 05508-900, Brazil. ' Department of Civil and Environmental Engineering, University of California, Berkeley, CA 94720-1710, USA. ' University of California at Los Angeles, Institute of the Environment, SCPCS, CHS-51.294, Los Angeles, CA 90095, USA

Abstract: The main sources of ozone precursors in the atmosphere of the Sao Paulo Metropolitan Area (SPMA) in Brazil are emissions from gasoline-, ethanol-, and diesel-powered vehicles. Ozone is a significant air quality problem in the SPMA. To come into compliance with the National Ambient Air quality Standard for Ozone, emission reduction policies must be established. An adequate emissions inventory and a description of the meteorology and chemistry involved are needed in order to evaluate the effectiveness of methodologies that reduce the effect of vehicle emissions on ozone formation. During the period 10–12 August 1999, concentrations of ozone in the SPMA and the impact of the official emissions inventory were simulated through application of an urban-scale Eulerian model. We found that using the official inventory in simulations resulted in ozone values much lower than those observed and nitrogen oxide emission profiles that were overestimated by a factor of approximately two.

Keywords: air quality modelling; CIT model; mobile sources emissions; ozone; photochemical air pollution; Brazil; vehicle emissions; emission reduction; urban air pollution; simulation.

DOI: 10.1504/IJEP.2004.005681

International Journal of Environment and Pollution, 2004 Vol.22 No.4, pp.460 - 475

Available online: 18 Nov 2004 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article