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| Titel |
Measurements and receptor modeling of volatile organic compounds in Southeastern Mexico City, 2000–2007 |
| VerfasserIn |
H. Wöhrnschimmel, M. Magaña, W. A. Stahel, S. Blanco, S. Acuña, J. M. Pérez, S. González, V. Gutiérrez, S. Wakamatsu, B. Cárdenas |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 18 ; Nr. 10, no. 18 (2010-09-29), S.9027-9037 |
| Datensatznummer |
250008794
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| Publikation (Nr.) |
 copernicus.org/acp-10-9027-2010.pdf |
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| Zusammenfassung |
| 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. |
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