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| Titel |
Volatile Organic Compounds source contributions in Paris: Measurement and modeling approaches. Focus on the traffic source |
| VerfasserIn |
Valérie Gros, Hervé Petetin, Roland Sarda-Estève, Cerise kalogridis, Alexia Baudic, Nicolas Bonnaire, Bernard Bonsang, Irène Xuéref-Rémy, Lamia Ammoura, Tiphaine Le Priol, Jean François Petit, Olivier Sanchez, Amandine Rosso, Olivier Perrussel, Jean-Eudes Petit, Jean Sciare |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250080399
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| Zusammenfassung |
| Paris is one of the few European megacities and with 11 Million inhabitants, almost 1/5
French population lives in Paris and its region. The EU-MEGAPOLI project allowed a
detailed characterization of gaseous and particulate pollution in Paris in summer (July 2009)
and winter (Jan-Feb 2010). Studies about VOCs source contributions performed for these
periods have suggested the importance of traffic emissions, in contradiction with the local
emission inventory, for which solvent source is the dominant VOC source in Paris. In order to
examine the representativity of such conclusions, one-year (March 2010- March 2011) of
continuous measurements of VOCs have been performed at the same urban site
in Paris (as part of a French program PRIMEQUAL-FRANCIPOL). In addition,
VOCs measurements (along with other gaseous and aerosol compounds) have been
performed in a tunnel in order to better characterize the traffic source (October 2012,
PRIMEQUAL -PREQUALIF project). Preliminary results will be presented here
from this unique dataset, with a focus made on oxygenated compounds (methanol,
acetaldehyde, acetone) and aromatic compounds (benzene, toluene, xylens-¦). We will show
that the daily variability of oxygenated compounds is mainly linked to the local
traffic source, as suggested by their co-variation with other compounds related to
traffic emissions (CO, xylens-¦). In addition to this local source, we will show that
oxygenated compounds baseline concentration levels are significantly enhanced during
specific events (of a few day duration) characterized by continental air masses.
Surprisingly other long-lived compounds (CO) appear to be much less affected by
these events, providing evidences that the nature of these continental sources is
not yet well established. Results from VOCs source contributions identification,
quantification and geographical origin (Positive Matrix Factorization and Potential Source
Contribution Function approaches) will be presented as well as first results obtained with
the CHIMERE model used both in research and air quality forecasting at local,
national and European scales. The wide variety of measured compounds will allow
evaluating both VOC’s emission inventory and formation/consumption processes. |
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