Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Atmos. Chem. Phys., 10, 9027-9037, 2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.
29 Sep 2010
Measurements and receptor modeling of volatile organic compounds in Southeastern Mexico City, 2000–2007
H. Wöhrnschimmel1,2, M. Magaña1, W. A. Stahel3, S. Blanco1, S. Acuña4, J. M. Pérez1, S. González1, V. Gutiérrez1, S. Wakamatsu5, and B. Cárdenas1 1Instituto Nacional de Ecología, Mexico City, Mexico
2Institute for Chemical and Bioengineering, ETH Zurich, Switzerland
3Seminar for Statistics, ETH Zurich, Switzerland
4Instituto Politécnico Nacional, Mexico City, Mexico
5Ehime University, Matsuyama, Japan
Abstract. Ambient samples of volatile organic compounds (VOCs) were measured between 2000 and 2007 in Southeastern Mexico City, quantifying 13 species (ethane, propane, propylene, butane, acetylene, pentane, hexane, heptane, benzene, octane, toluene, nonane, o-xylene). These time series were analyzed for long-term trends, using linear regression models. A main finding was that the concentrations for several VOC species were decreasing during this period. A receptor model was applied to identify possible VOC sources, as well as temporal patterns in their respective contributions. Domestic use of liquefied petroleum gas (LPG) and vehicle exhaust are suggested to be the principal emission sources, contributing together between 70% and 80% to the total of quantified species. Both diurnal and seasonal patterns, as well as a weekend effect were recognized in the modelled source contributions. Furthermore, decreasing trends over time were found for LPG and hot soak (−7.8% and −12.7% per year, respectively, p < 0.01), whereas for vehicle exhaust no significant trend was found.

Citation: Wöhrnschimmel, H., Magaña, M., Stahel, W. A., Blanco, S., Acuña, S., Pérez, J. M., González, S., Gutiérrez, V., Wakamatsu, S., and Cárdenas, B.: Measurements and receptor modeling of volatile organic compounds in Southeastern Mexico City, 2000–2007, Atmos. Chem. Phys., 10, 9027-9037,, 2010.
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