Analysis of Criteria Air Pollutant Trends in Three Mexican Metropolitan Areas

Atmosphere

Sandy-Edith Benítez-Garc໚¹  Isao Kanda²  Shinji Wakamatsu²  Yukiyo Okazaki²  Masahide Kawano¹ 

[1] Department of Life Environment Conservation Science, United Graduate School of Agricultural Sciences, Ehime University, Matsuyama, Ehime 790-8566, Japan; E-Mail:;Faculty of Agriculture, Ehime University, Matsuyama, Ehime 790-8566, Japan; E-Mails:

关键词: air quality standards;    criteria pollutants;    Guadalajara;    Mexico;    Monterrey;   

DOI  :  10.3390/atmos5040806

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.