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| Titel |
Regional impacts of ultrafine particle emissions from the surface of the Great Lakes |
| VerfasserIn |
S. H. Chung, B. M. Basarab, T. M. VanReken |
| 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 ; 11, no. 24 ; Nr. 11, no. 24 (2011-12-15), S.12601-12615 |
| Datensatznummer |
250010267
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| Publikation (Nr.) |
 copernicus.org/acp-11-12601-2011.pdf |
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| Zusammenfassung |
| Quantifying the impacts of aerosols on climate requires a detailed knowledge
of both the anthropogenic and the natural contributions to the aerosol
population. Recent work has suggested a previously unrecognized natural
source of ultrafine particles resulting from breaking waves at the surface
of large freshwater lakes. This work is the first modeling study to
investigate the potential for this newly discovered source to affect the
aerosol number concentrations on regional scales. Using the WRF-Chem
modeling framework, the impacts of wind-driven aerosol production from the
surface of the Great Lakes were studied for a July 2004 test case.
Simulations were performed for a base case with no lake surface emissions, a
case with lake surface emissions included, and a default case wherein large
freshwater lakes emit marine particles as if they were oceans. Results
indicate that the lake surface emissions can enhance the surface-level aerosol number concentration
by ~20% over the remote northern Great
Lakes and by ~5% over other parts of the Great Lakes. These results
were highly sensitive to the new particle formation (i.e., nucleation)
parameterization within WRF-Chem; when the new particle formation process
was deactivated, surface-layer enhancements from the lake emissions
increased to as much as 200%. The results reported here have significant
uncertainties associated with the lake emission parameterization and the way
ultrafine particles are modeled within WRF-Chem. Nevertheless, the
magnitudes of the impacts found in this study suggest that further study to
quantify the emissions of ultrafine particles from the surface of the Great
Lakes is merited. |
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