 |
| Titel |
Source apportionment of carbonaceous aerosol in southern Sweden |
| VerfasserIn |
J. Genberg, M. Hyder, K. Stenström, R. Bergstrom, D. Simpson, E. O. Fors, J. Å. Jönsson, E. Swietlicki |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1680-7316
|
| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 22 ; Nr. 11, no. 22 (2011-11-16), S.11387-11400 |
| Datensatznummer |
250010193
|
| Publikation (Nr.) |
 copernicus.org/acp-11-11387-2011.pdf |
|
|
|
|
|
| Zusammenfassung |
| A one-year study was performed at the Vavihill background station in
southern Sweden to estimate the anthropogenic contribution to the
carbonaceous aerosol. Weekly samples of the particulate matter PM10 were
collected on quartz filters, and the amounts of organic carbon, elemental
carbon, radiocarbon (14C) and levoglucosan were measured. This approach
enabled source apportionment of the total carbon in the PM10 fraction using
the concentration ratios of the sources. The sources considered in this
study were emissions from the combustion of fossil fuels and biomass, as
well as biogenic sources. During the summer, the carbonaceous aerosol mass
was dominated by compounds of biogenic origin (80%), which are
associated with biogenic primary and secondary organic aerosols. During the
winter months, biomass combustion (32%) and fossil fuel combustion
(28%) were the main contributors to the carbonaceous aerosol. Elemental
carbon concentrations in winter were about twice as large as during summer,
and can be attributed to biomass combustion, probably from domestic wood
burning. The contribution of fossil fuels to elemental carbon was stable
throughout the year, although the fossil contribution to organic carbon
increased during the winter. Thus, the organic aerosol originated mainly
from natural sources during the summer and from anthropogenic sources during
the winter. The result of this source apportionment was compared with
results from the EMEP MSC-W chemical transport model. The model and
measurements were generally consistent for total atmospheric organic carbon,
however, the contribution of the sources varied substantially. E.g. the
biomass burning contributions of OC were underestimated by the model by a
factor of 2.2 compared to the measurements. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|