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| Titel |
Real-time secondary aerosol formation during a fog event in London |
| VerfasserIn |
M. Dall'Osto, R. M. Harrison, H. Coe, P. Williams |
| 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. 7 ; Nr. 9, no. 7 (2009-04-03), S.2459-2469 |
| Datensatznummer |
250007162
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| Publikation (Nr.) |
 copernicus.org/acp-9-2459-2009.pdf |
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| Zusammenfassung |
| A fog event was monitored with state-of-the art real-time aerosol mass
spectrometers in an urban background location in London (England) during the
REPARTEE-I experiment. Specific particle types rich in
hydroxymethanesulphonate (HMS) were found only during the fog event.
Formation of inorganic and organic secondary aerosol was observed as soon as
fog was detected and two different mechanisms are suggested to be
responsible for the production of two different types of aerosol. Nitrate
aerosol is produced in the liquid phase within the droplet. Contrary to
previous studies, the formation of HULIS was observed on interstitial
particles rather than evaporated fog droplets, suggesting heterogeneous
formation mechanisms depending on parameters other than the water content
and not fully understood. Not only are secondary aerosol constituents
produced during the fog event, but the primary aerosol is observed to be
processed by the fog event, dramatically changing its chemical properties. |
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