WIT Press

Air Pollutant Transport Within The Mexico City Basin

Price

Free (open access)

Paper DOI

10.2495/AIR990791

Volume

37

Pages

10

Published

1999

Size

1,195 kb

Author(s)

Jerome D. Fast

Abstract

To better understand the factors that contribute to high ozone and particulate concentrations in Mexico City, a meteorological and aerosol field campaign was conducted over a four-week period in the winter of 1997 that measured vertical profiles of wind, temperature, and humidity at several locations. A coupled mesoscale-chemistry model is employed along with wind profiler and sounding measurements to examine how thermally-driven circulations contribute to the spatial distribution of ozone across the basin. Results from the modeling system demonstrate that recirculation patterns are often formed by the interaction of local thermally-induced flows and regional ambient winds. Layers of ozone and ozone precursors are produced by these recirculation patterns and are subsequently entrained into

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