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| Titel |
Carbonaceous aerosols contributed by traffic and solid fuel burning at a polluted rural site in Northwestern England |
| VerfasserIn |
D. Liu, J. Allan, B. Corris, M. Flynn, E. Andrews, J. Ogren, K. Beswick, K. Bower, R. Burgess, T. Choularton, J. Dorsey, W. Morgan, P. I. Williams, H. Coe |
| 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 ; 11, no. 4 ; Nr. 11, no. 4 (2011-02-18), S.1603-1619 |
| Datensatznummer |
250009366
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| Publikation (Nr.) |
 copernicus.org/acp-11-1603-2011.pdf |
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| Zusammenfassung |
| The experiment presented in this paper was conducted at the Holme Moss site,
which is located in the southern Pennines region in Northwestern England
during November–December 2006. The strong southwesterly wind during the experimental
period, which enhanced the transport of urban pollutants from the
conurbations of Greater Manchester and Liverpool, in addition to the
seasonally increased nearby residential heating activities, made this site a
receptor for pollutants from a range of sources. A factor analysis is
applied to the mass spectra of organic matter (OM) measured by the Aerodyne
Aerosol Mass Spectrometer (AMS) to attribute the pollutant sources. Besides
the oxygenated organic aerosol (OOA), this site was found to contain a
considerable fraction of primary organic aerosols (POA, mass fraction
50–70% within total mass of OM). The POA sources are attributed to be
traffic emission and solid fuel burning, which are identified as
hydrocarbon-like organic aerosol (HOA) and solid fuel organic aerosol (SFOA)
respectively. There were strongly combined emissions of black carbon (BC)
particles from both sources. The refractory BC component (rBC) was
characterized by a single particle soot photometer. This site began to be
influenced during the late morning by fresh traffic emissions, whereas solid
fuel burning became dominant from late afternoon until night. A covariance
analysis of rBC and POA was used to derive source specific emission factors
of 1.61 μgHOA/μgrBC and 1.96 μgHOA/μgrBC. The absorbing
properties of aerosols were characterized at multiple wavelengths (λ), and a stronger spectral dependence of absorption was observed when this
site was significantly influenced by solid fuel burning. The rBC was
estimated to contribute 3–16% of submicron aerosol mass. The single
scattering albedo at λ = 700 nm (SSA700 nm) was significantly
anti-correlated with the rBC mass fraction, but also associated with the BC
mixing state. The BC incorporation/removal process therefore may play a role
in modulating the radiative properties of aerosols at the site under the
influence of fresh sources. Given that traffic and residential combustion of
solid fuels are significant contributors of carbonaceous aerosols over
Europe, these results provide important source-specific information on
modeling the anthropogenic carbonaceous aerosols. |
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