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| Titel |
Inter-comparison of source apportionment models for the estimation of wood burning aerosols during wintertime in an Alpine city (Grenoble, France) |
| VerfasserIn |
O. Favez, I. Haddad, C. Piot, A. Boréave, E. Abidi, N. Marchand, J.-L. Jaffrezo, J.-L. Besombes, M.-B. Personnaz, J. Sciare, H. Wortham, C. George, B. D'Anna |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 12 ; Nr. 10, no. 12 (2010-06-16), S.5295-5314 |
| Datensatznummer |
250008554
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| Publikation (Nr.) |
 copernicus.org/acp-10-5295-2010.pdf |
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| Zusammenfassung |
| The emission of organic aerosols (OA) in the ambient air by residential wood
burning is nowadays a subject of great scientific concern and a growing
number of studies aim at apportioning the influence of such emissions on
urban air quality. In the present study, results obtained using two
commonly-used source apportionment models, i.e., Chemical Mass Balance (CMB,
performed with off-line filter measurements) and Positive Matrix
Factorization (PMF, applied to Aerosol Mass Spectrometer measurements), as
well as using the recently-proposed Aethalometer model (based on the
measurement of the aerosol light absorption at different wavelengths) are
inter-compared. This work is performed using field data obtained during the
winter season (14 to 29 January 2009) at an urban background site of a
French Alpine city (Grenoble). Converging results from the different models
indicate a major contribution of wood burning organic aerosols (OMwb)
to the ambient aerosol organic fraction, with mean OMwb contributions
to total OA of 68%, 61% and 37% for the CMB, the Aethalometer and
the AMS-PMF models respectively, during the period when the three modelling
studies overlapped (12 days). Quantitative discrepancies might notably be
due to the overestimation of OMwb calculated by the CMB due to the loss
of semi-volatile compounds from sources to receptor site, as well as to the
accounting of oxidized primary wood burning organic (OPOAwb) aerosols
within the Oxygenated Organic Aerosol (OOA) PMF-factor. This OOA factor
accounts on average for about 50% of total OM, while non-combustion
sources contribute to about 25% and 28% of total OM according to the
CMB and Aethalometer models respectively. Each model suggests a mean
contribution of fossil fuel emissions to total OM of about 10%. A good
agreement is also obtained for the source apportionment of elemental carbon
(EC) by both the CMB and the Aethalometer models, with fossil fuel emissions
representing on average more than 80% of total EC. |
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