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| Titel |
Volatile organic compounds source apportionment in Paris in spring 2007 |
| VerfasserIn |
V. Gros, C. Gaimoz, B. Bonsang, Frank Herrmann, J. Williams, S. Sauvage, N. Locoge, O. D'Argouges, R. Sarda-Estève, J. Sciare |
| 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 |
250030205
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| Zusammenfassung |
| Volatile Organic Compounds and PM 2.5 aerosols fast measurements were performed during
an intensive campaign in Paris (May-June 2007) within the framework of the French
ANR-AEROCV project. Volatile organic compounds were measured in-situ every 30
minutes with GF-FID and every 5 minutes with a PTR-MS. The Positive Matrix
Factorization (PMF) model was applied to the VOC dataset in order to determine
the number of influencing sources and source profiles were identified by using
known literature profiles and by the help of measured tracers (carbon monoxide,
aerosols-¦).
The campaign was characterized by two different air mass origins regimes:
oceanic air masses (only local/regional pollution is observed) and continental air
masses (in addition continental pollution is observed) (see Sciare et al. this session).
Results from PMF simulations showed that the main contributing sources were
traffic exhaust, gasoline evaporation, natural gas, industry and biogenic sources
(this last source has a very small contribution probably slightly underestimated as
isoprene was the only measured biogenic compound). Then the Chemical Mass
Balance model was applied on the two periods (oceanic/continental air masses) to
quantify the respective source contributions. During the oceanic period, where “only”
local/regional pollution was monitored, the main contributing source was traffic
related (about 60% for traffic exhaust and evaporation) whereas natural gas and
industry sources were about 20% each. This is a significantly different from the local
emission inventory which attributes about 40% VOC emissions in Paris to traffic, 30%
to solvent industry and 30% to residential (equivalent to our natural gas source).
During the continental air masses period, industrial sources then play a major role,
about 45% (versus 40% to traffic related sources and 15% for natural gas). This
industrial source, which is associated with large amounts of oxygenated compound,
is attributed to non-local emissions as suggested by the variability of this source
contribution.
This study give first results about VOCs polluting sources in Paris and give some
preliminary information for the future EU-MEGAPOLI field campaigns (Paris, July 2009 and
January 2010) which aim to quantify sources of primary and secondary aerosol,
and the interaction with gaseous precursors (see Beekmann et al., this session). |
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