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| Titel |
Submicron aerosol source apportionment of wintertime pollution in Paris, France by double positive matrix factorization (PMF2) using an aerosol chemical speciation monitor (ACSM) and a multi-wavelength Aethalometer |
| VerfasserIn |
J.-E. Petit, O. Favez, J. Sciare, F. Canonaco, P. Croteau, G. Mocnik, J. Jayne, D. Worsnop, E. Leoz-Garziandia |
| 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 ; 14, no. 24 ; Nr. 14, no. 24 (2014-12-22), S.13773-13787 |
| Datensatznummer |
250119265
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| Publikation (Nr.) |
 copernicus.org/acp-14-13773-2014.pdf |
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| Zusammenfassung |
| Online non-refractory submicron aerosol mass spectrometer (AMS) measurements
in urban areas have successfully allowed the apportionment of specific
sources and/or physical and chemical properties of the organic fraction.
However, in order to be fully representative of PM pollution, a
comprehensive source apportionment analysis is needed by taking into account
all major components of submicron aerosols, creating strengthened bonds
between the organic components and pollution sources. We present here a
novel two-step methodology to perform such an analysis, by taking advantage
of high time resolution of monitoring instruments: the aerosol chemical
speciation monitor (ACSM) and the multi-wavelength absorption measurements
(Aethalometer AE31) in Paris, France. As a first step, organic aerosols (OA)
were deconvolved to hydrocarbon-like OA (HOA), biomass burning OA (BBOA)
and oxygenated OA (OOA) with positive matrix factorization (PMF), and black carbon
was deconvolved into its wood burning and fossil fuel combustion fractions.
A second PMF analysis was then carried out with organic factors, BC
fractions and inorganic species (nitrate, sulfate, ammonium, chloride),
leading to a four-factor solution allowing highly time-resolved
characterization of the major sources of PM1. Outputs of this
PMF2 include two dominant combustion sources (wood burning
and traffic) as well as semi-volatile and low-volatile secondary aerosols.
While HOA is found to be emitted by both wood burning and traffic, the
latter sources occurred to significantly contribute also to OOA. |
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