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| Titel |
Charge induced stability of water droplets in subsaturated environment |
| VerfasserIn |
J. K. Nielsen, C. Maus, D. Rzesanke, T. Leisner |
| 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. 5 ; Nr. 11, no. 5 (2011-03-07), S.2031-2037 |
| Datensatznummer |
250009445
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| Publikation (Nr.) |
 copernicus.org/acp-11-2031-2011.pdf |
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| Zusammenfassung |
| Atmospheric liquid and solid water particles are stabilized if they
are coated with either negative or positive electric charge. The
surface charge causes an increase of the partial pressure of water
vapour close to the surface of each particle, effectively allowing the
particles to remain in their condensed phase even if the environmental
relative humidity drops below unity. The theory, briefly presented in
this paper, predicts a zero parameter relation between surface charge
density and water vapour pressure. This relation was tested in
a series of Electrodynamic Balance experiments. The measurements
were performed by stabilizing charged droplets of pure water near an
ice-surface. We observed a divergence in radius as the temperature
approached the freezing point from below. We find that the
measurements confirm the theory within the experimental uncertainty.
In some cases this generally overlooked effect may have impact on
cloud processes and on results produced by Electrodynamic Balance
experiments. |
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