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| Titel |
Implementation of polar ice emissions of iodine in a global chemistry climate model |
| VerfasserIn |
Alfonso Saiz-Lopez, Antia Carmona-Balea, Caterina Juan-Vicente, Carlos A. Cuevas, Douglas E. Kinnison, Jean-Francois Lamarque |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250133820
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| Publikation (Nr.) |
 EGU/EGU2016-14472.pdf |
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| Zusammenfassung |
| The sources of the large iodine monoxide (IO) concentrations measured in coastal Antarctica remain unknown. In this work polar iodine emissions have been included in the global chemistry-climate model CAM-Chem. The implementation is based on three recent suggested mechanisms: i) release of iodine through the equilibrium HOI+I-↔I2+H2O from sea-ice algae and subsequent diffusion through brine channels to accumulate in the brine layer; ii) photolysis of iodate frozen salts, and iii) emission of gaseous iodine from the production of triiodide (I3-) via iodide oxidation in frozen solution. The results are compared to ground- ship- and satellite-based observations of IO in the Antarctic troposphere. |
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