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Investigaciones geográficas
versão On-line ISSN 2448-7279versão impressa ISSN 0188-4611
Resumo
JAUREGUI OSTOS, Ernesto. Climatología de difusión de la ciudad de Tijuana, B. C.. Invest. Geog [online]. 1981, n.11, pp.55-91. ISSN 2448-7279.
The marine layer of cool air characteristic of Southern California prevails over die Tijuana basin during must of the year and is topped by an upper temperature inversion. This condition restricts dilution of air contaminants in the vertical especially during the summer when the average mixing heigth is much less than the inversion top resulting in severe trapping of emissions. Streamline analysis shows that during the day there is a transport of air (and pollutants) upslope the river valley of Tijuana. At night and early morning a reversal of the flow is usually observed. The valley winds reinforced by the sea breeze from the west favour the transport of pollutants originating at the other side of the border in metropolitan San Diego. These contaminants are added to the local emissions in Tijuana which are mainiy suspended particles and ozone.