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| Titel |
Carbonate precipitation in brine – a potential trigger for tropospheric ozone depletion events |
| VerfasserIn |
R. Sander, J. Burrows, L. Kaleschke |
| 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 ; 6, no. 12 ; Nr. 6, no. 12 (2006-10-17), S.4653-4658 |
| Datensatznummer |
250004144
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| Publikation (Nr.) |
 copernicus.org/acp-6-4653-2006.pdf |
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| Zusammenfassung |
| Tropospheric ozone depletion events (ODEs) at high latitudes were
discovered 20 years ago and are attributed to bromine explosions.
However, an unresolved issue is the explanation of how the
acid-catalyzed reaction cycle is triggered in atmospheric particles
derived from alkaline sea water. By simulating the chemistry occuring
in polar regions over recently formed sea ice, we can model
successfully the transformation of inert sea-salt bromide to reactive
bromine monoxide (BrO) and the subsequent ODE when
precipitation of calcium carbonate from freezing sea water is taken
into account. In addition, we found the temperature dependence of the
equilibrium BrCl+Br−↔Br2Cl− to be important. |
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