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Atmosphere 2014, 5(4), 806-829;

Analysis of Criteria Air Pollutant Trends in Three Mexican Metropolitan Areas

Department of Life Environment Conservation Science, United Graduate School of Agricultural Sciences, Ehime University, Matsuyama, Ehime 790-8566, Japan
Faculty of Agriculture, Ehime University, Matsuyama, Ehime 790-8566, Japan
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 11 August 2014 / Revised: 10 October 2014 / Accepted: 21 October 2014 / Published: 5 November 2014
(This article belongs to the Special Issue Air Quality and Climate)
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Data from the annual, seasonal, and hourly behavior of the criteria air pollutants CO, NO2, SO2, O3, and PM10 in three Mexican metropolitan areas (the Mexico City Metropolitan Area (MCMA), Guadalajara Metropolitan Area (GMA), and Monterrey Metropolitan Area (MMA)) over the period 2000–2011 were analyzed; and compliance with Mexican air quality standards was evaluated, highlighting causes of specific episodes of high and low concentrations. Data analyzed were collected from automatic air-monitoring networks located in the MCMA (32 stations), GMA (8 stations), and MMA (5 stations). In the MCMA and MMA, correlations between wind direction and concentrations of SO2 suggest that there was a considerable contribution of trans-boundary transport from outside of these areas. Analysis of annual trends revealed large reductions of CO in the MCMA, and SO2 in the three metropolitan areas. However, the annual mean concentration of O3 increased by 47% and 42% in the GMA and MMA, respectively, from 2000 to 2011, but decreased by 13% in the MCMA from 2005 to 2010. The annual mean concentration of PM10 in the MMA was about 58% and 76% higher than that in the MCMA and GMA, respectively, from 2001 to 2010. View Full-Text
Keywords: air quality standards; criteria pollutants; Guadalajara; Mexico; Monterrey air quality standards; criteria pollutants; Guadalajara; Mexico; Monterrey

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Benítez-García, S.-E.; Kanda, I.; Wakamatsu, S.; Okazaki, Y.; Kawano, M. Analysis of Criteria Air Pollutant Trends in Three Mexican Metropolitan Areas. Atmosphere 2014, 5, 806-829.

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