 |
| Titel |
Wintertime aerosol chemical composition and source apportionment of the organic fraction in the metropolitan area of Paris |
| VerfasserIn |
M. Crippa, P. F. DeCarlo, J. G. Slowik, C. Mohr, M. F. Heringa, R. Chirico, L. Poulain, F. Freutel, J. Sciare, J. Cozic, C. F. Marco, M. Elsässer, J. B. Nicolas, N. Marchand, E. Abidi, A. Wiedensohler, F. Drewnick, J. Schneider, S. Borrmann, E. Nemitz, R. Zimmermann, J.-L. Jaffrezo, A. S. H. Prévôt, U. Baltensperger |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 2 ; Nr. 13, no. 2 (2013-01-23), S.961-981 |
| Datensatznummer |
250017610
|
| Publikation (Nr.) |
 copernicus.org/acp-13-961-2013.pdf |
|
|
|
|
|
| Zusammenfassung |
The effect of a post-industrial megacity on local and regional air quality
was assessed via a month-long field measurement campaign in the Paris
metropolitan area during winter 2010. Here we present source apportionment
results from three aerosol mass spectrometers and two aethalometers deployed
at three measurement stations within the Paris region. Submicron aerosol
composition is dominated by the organic fraction (30–36%) and nitrate
(28–29%), with lower contributions from sulfate (14–16%), ammonium
(12–14%) and black carbon (7–13%).
Organic source apportionment was performed using positive matrix
factorization, resulting in a set of organic factors corresponding both to
primary emission sources and secondary production. The dominant primary
sources are traffic (11–15% of organic mass), biomass burning (13–15%)
and cooking (up to 35% during meal hours). Secondary organic aerosol
contributes more than 50% to the total organic mass and includes a highly
oxidized factor from indeterminate and/or diverse sources and a less
oxidized factor related to wood burning emissions. Black carbon was
apportioned to traffic and wood burning sources using a model based on
wavelength-dependent light absorption of these two combustion sources. The
time series of organic and black carbon factors from related sources were
strongly correlated. The similarities in aerosol composition, total mass and
temporal variation between the three sites suggest that particulate
pollution in Paris is dominated by regional factors, and that the emissions
from Paris itself have a relatively low impact on its surroundings. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|