naa a22 4500 528787152 20180924065502.0 cr unu---uuuuu 180924s2010 xx s 000 0 eng 10.3929/ethz-b-000027647 doi 10.5194/acp-10-9027-2010 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/27647 Measurements and receptor modeling of volatile organic compounds in Southeastern Mexico City, 2000-2007 [Elektronische Daten] [Henry Wöhrnschimmel, Miguel Magaña, Werner A. Stahel, Salvador Blanco, S. Acuña, J.M. Pérez, S. González, V. Gutiérrez, Shinji Wakamatsu, B. Cárdenas] Atmos. chem. phys. Open access ethresearch 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. Creative Commons Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0 ethresearch Wöhrnschimmel Henry joint author Magaña Miguel joint author Stahel Werner A. joint author Blanco Salvador joint author Acuña S. joint author Pérez J.M. joint author González S. joint author Gutiérrez V. joint author Wakamatsu Shinji joint author Cárdenas B. joint author Atmospheric Chemistry and Physics Munich : European Geophysical Society 10 (18), pp. 9027-9037 1680-7375 http://hdl.handle.net/20.500.11850/27647 text/html WWW-Backlink auf das Repository (Open access) 1 Journal Article ethresearch ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/27647 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 700 1- Wöhrnschimmel Henry joint author ETHRESEARCH 700 1- Magaña Miguel joint author ETHRESEARCH 700 1- Stahel Werner A. joint author ETHRESEARCH 700 1- Blanco Salvador joint author ETHRESEARCH 700 1- Acuña S. joint author ETHRESEARCH 700 1- Pérez J.M. joint author ETHRESEARCH 700 1- González S. joint author ETHRESEARCH 700 1- Gutiérrez V. joint author ETHRESEARCH 700 1- Wakamatsu Shinji joint author ETHRESEARCH 700 1- Cárdenas B. joint author ETHRESEARCH 773 0- Atmospheric Chemistry and Physics Munich : European Geophysical Society 10 (18), pp. 9027-9037 1680-7375 BK010053 XK010053 XK010000 ETHRESEARCH ETHRESEARCH ETHRESEARCH Journal Article Open access