Photochemical box model for Mexico City

A. T. YOUG, E. A. BETTERTON, L. SALDIVAR DE RUEDA

Abstract

A multi-level, photochemical box model has been developed for the Mexico City metropolitan area (MCMA). A combination of in situ measurements and emission inventory estimates was used to obtain estimates of hydrocarbon speciation and emissions as well as NOx emissions. Preliminary results indicate that certain emissions estimates of NOx may be too high by a factor of two. This could cause the calculated, ozone isopleths to indicate that atmospheric O3 production in the MCMA could be hydrocarbon-limited. Hydrocarbon and/or NOx control strategies should not be implemented before a reliable emissions inventory is available.

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