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| Titel |
Receptor modelling of secondary and carbonaceous particulate matter at a southern UK site |
| VerfasserIn |
A. Charron, C. Degrendele, B. Laongsri, R. M. Harrison |
| 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 ; 13, no. 4 ; Nr. 13, no. 4 (2013-02-19), S.1879-1894 |
| Datensatznummer |
250017665
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| Publikation (Nr.) |
 copernicus.org/acp-13-1879-2013.pdf |
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| Zusammenfassung |
| Complementary approaches have been taken to better understand the sources
and their spatial distribution for secondary inorganic (nitrate and
sulphate) and secondary organic aerosol sampled at a rural site (Harwell) in
the southern United Kingdom. A concentration field map method was applied to
1581 daily samples of chloride, nitrate and sulphate from 2006 to 2010, and
982 samples for organic carbon and elemental carbon from 2007 to 2010. This
revealed a rather similar pattern of sources for nitrate, sulphate and
secondary organic carbon within western/central Europe, which in the case of
nitrate, sulphate, organic carbon and secondary organic carbon, correlated
significantly with EMEP emissions maps of NOx, SO2, and VOC
respectively. A slightly more southerly source emphasis for secondary
organic carbon may reflect the contribution of biogenic sources. Trajectory
clusters confirm this pattern of behaviour with a major contribution from
mainland European sources. Similar behaviours of, on the one hand, sulphate
and organic carbon and, on the other hand, EC and nitrate showed that the
former are more subject to regional influence than the latter in agreement
with the slower atmospheric formation of sulphate and secondary organic
aerosol than for nitrate, and the local/mesoscale influences upon primary
EC. However, careful analysis of back trajectories and Concentration Field
Maps indicates a strong contribution of mainland European sites to EC
concentrations at Harwell. In a separate study, measurements of sulphate,
nitrate, elemental and organic carbon were made in 100 simultaneously
collected samples at Harwell and at a suburban site in Birmingham (UK). This
showed a significant correlation in concentrations between the two sites for
all of the secondary constituents, further indicating secondary organic
aerosol to be a regional pollutant behaving similarly to sulphate and nitrate. |
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