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| Titel |
Fossil and non-fossil sources of organic carbon (OC) and elemental carbon (EC) in Göteborg, Sweden |
| VerfasserIn |
S. Szidat, M. Ruff, N. Perron, L. Wacker, H.-A. Synal, M. Hallquist, A. S. Shannigrahi, K. E. Yttri, C. Dye, D. Simpson |
| 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 ; 9, no. 5 ; Nr. 9, no. 5 (2009-03-02), S.1521-1535 |
| Datensatznummer |
250006997
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| Publikation (Nr.) |
 copernicus.org/acp-9-1521-2009.pdf |
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| Zusammenfassung |
| Particulate matter was collected at an urban site in Göteborg (Sweden)
in February/March 2005 and in June/July 2006. Additional samples were
collected at a rural site for the winter period. Total carbon (TC)
concentrations were 2.1–3.6 μg m−3, 1.8–1.9 μg m−3, and
2.2–3.0 μg m−3 for urban/winter, rural/winter, and urban/summer
conditions, respectively. Elemental carbon (EC), organic carbon (OC),
water-insoluble OC (WINSOC), and water-soluble OC (WSOC) were analyzed for
14C in order to distinguish fossil from non-fossil emissions. As wood
burning is the single major source of non-fossil EC, its contribution can be
quantified directly. For non-fossil OC, the wood-burning fraction was
determined independently by levoglucosan and 14C analysis and combined
using Latin-hypercube sampling (LHS). For the winter period, the relative
contribution of EC from wood burning to the total EC was >3 times higher
at the rural site compared to the urban site, whereas the absolute
concentrations of EC from wood burning were elevated only moderately at the
rural compared to the urban site. Thus, the urban site is substantially more
influenced by fossil EC emissions. For summer, biogenic emissions dominated
OC concentrations most likely due to secondary organic aerosol (SOA)
formation. During both seasons, a more pronounced fossil signal was observed
for Göteborg than has previously been reported for Zurich, Switzerland.
Analysis of air mass origin using back trajectories suggests that the fossil
impact was larger when local sources dominated, whereas long-range transport
caused an enhanced non-fossil signal. In comparison to other European
locations, concentrations of levoglucosan and other monosaccharide
anhydrides were low for the urban and the rural site in the area of
Göteborg during winter. |
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