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| Titel |
A 2.5 year's source apportionment study of black carbon from wood burning and fossil fuel combustion at urban and rural sites in Switzerland |
| VerfasserIn |
H. Herich, C. Hueglin, B. Buchmann |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 4, no. 7 ; Nr. 4, no. 7 (2011-07-19), S.1409-1420 |
| Datensatznummer |
250002053
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| Publikation (Nr.) |
 copernicus.org/amt-4-1409-2011.pdf |
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| Zusammenfassung |
The contributions of fossil fuel (FF) and wood burning (WB) emissions to
black carbon (BC) have been investigated in the recent past by analysis of
multi-wavelength aethalometer data. This approach utilizes the stronger
light absorption of WB aerosols in the near ultraviolet compared to the
light absorption of aerosols from FF combustion.
Here we present 2.5 years of seven-wavelength aethalometer data from one
urban and two rural background sites in Switzerland measured from 2008–2010.
The contribution of WB and FF to BC was directly determined from the
aerosol absorption coefficients of FF and WB aerosols which were calculated
by using confirmed Ångstrom exponents and aerosol light absorption
cross-sections that were determined for all sites. Reasonable separation of
total BC into contributions from FF and WB was achieved for all sites and
seasons. The obtained WB contributions to BC are well correlated with
measured concentrations of levoglucosan and potassium while FF contributions
to BC correlate nicely with NOx. These findings support our approach
and show that the applied source apportionment of BC is well applicable for
long-term data sets.
During winter, we found that BC from WB contributes on average 24–33 % to
total BC at the considered measurement sites. This is a noticeable high
fraction as the contribution of wood burning to the total final energy
consumption is in Switzerland less than 4 %. |
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