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| Titel |
Emission indices and characterization of the NMHCs and trace gases in the city air of Santiago de Chile |
| VerfasserIn |
Y. Elshorbany, R. Kurtenbach, J. Kleffmann, M. Rubio, E. Lissi, G. Villena, E. Gramsch, P. Wiesen |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250020837
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| Zusammenfassung |
| Due to its unique geographic location and weather pattern, Santiago de Chile is a highly
polluted urban area and frequently experiences high pollution episodes. Policies
to reduce pollutants emissions require the determination of the emission indices
(EI) of these pollutants and identifying their potential sources. During the winter
campaign from June 25 - July 07, 2005, non-methane hydrocarbons (NMHCs) were
measured at short time intervals ranging from 30 to 60 min during the day time and
for longer periods during night. These measurements were also accompanied by
simultaneous measurements of HONO, HCHO, CO2, CO, NO, NO2, and photolysis
frequencies, j(O1D) and j(NO2). The average campaign mixing ratio of the total
measured NMHCs was 2028 ppbC of which only 970 ppbC were identified. Among
NMHCs, toluene and (m & p)-xylenes had the highest EI with 342 and 343 mg/kg fuel,
respectively while that of benzene was 167 mg/kg fuel. High EI for propane, propene and
i-butane were also observed which is mainly due to leakage of liquid petroleum gas
(LPG). EIs of CO, NO, HONO and HCHO were 59, 6.93, 0.044, 0.063 g/kg fuel,
respectively. Emission ratios of toluene/benzene, m-, p-xylene/ethylbenzene were 2.6 and
3.7, respectively. Analysis of the emission ratios and its significance is presented. |
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