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| Titel |
Modelling of organic aerosols over Europe (2002-2007) using a volatility basis set (VBS) framework: application of different assumptions regarding the formation of secondary organic aerosol |
| VerfasserIn |
R. Bergstrom, H. A. C. Denier van der Gon, A. S. H. Prévôt, K. E. Yttri, 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 ; 12, no. 18 ; Nr. 12, no. 18 (2012-09-21), S.8499-8527 |
| Datensatznummer |
250011460
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| Publikation (Nr.) |
 copernicus.org/acp-12-8499-2012.pdf |
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| Zusammenfassung |
| A new organic aerosol module has been implemented into the EMEP chemical
transport model. Four different volatility basis set (VBS) schemes
have been tested in long-term simulations for Europe, covering the
six years 2002–2007. Different assumptions regarding partitioning
of primary organic aerosol and aging of primary semi-volatile and
intermediate volatility organic carbon (S/IVOC) species and secondary
organic aerosol (SOA) have been explored. Model results are compared
to filter measurements, aerosol mass spectrometry (AMS) data and source
apportionment studies, as well as to other model studies. The present
study indicates that many different sources contribute significantly to
organic aerosol in Europe.
Biogenic and anthropogenic SOA, residential wood combustion and vegetation
fire emissions may all contribute more than 10% each over substantial
parts of Europe. This study shows smaller contributions from biogenic SOA
to organic aerosol in Europe than earlier work, but relatively greater
anthropogenic SOA. Simple VBS based organic aerosol models can give
reasonably good results for summer conditions but more observational
studies are needed to constrain the VBS parameterisations and to help
improve emission inventories. The volatility distribution of primary
emissions is one important issue for further work. Emissions of
volatile organic compounds from biogenic sources are also highly
uncertain and need further validation. We can not reproduce winter
levels of organic aerosol in Europe, and there are many indications that
the present emission inventories substantially underestimate emissions
from residential wood combustion in large parts of Europe. |
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