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| Titel |
Iodine oxide in the global marine boundary layer |
| VerfasserIn |
C. Prados-Roman, C. A. Cuevas, T. Hay, R. P. Fernandez, A. S. Mahajan, S.-J. Royer, M. Galí, R. Simó, J. Dachs, K. Grossmann, D. E. Kinnison, J.-F. Lamarque, A. Saiz-Lopez |
| 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 ; 15, no. 2 ; Nr. 15, no. 2 (2015-01-16), S.583-593 |
| Datensatznummer |
250119327
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| Publikation (Nr.) |
 copernicus.org/acp-15-583-2015.pdf |
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| Zusammenfassung |
| Emitted mainly by the oceans, iodine is a halogen compound important for
atmospheric chemistry due to its high ozone depletion potential and effect on
the oxidizing capacity of the atmosphere. Here we present a comprehensive
data set of iodine oxide (IO) measurements in the open marine boundary layer
(MBL) made during the Malaspina 2010 circumnavigation. Results show IO mixing
ratios ranging from 0.4 to 1 pmol mol−1 (30% uncertainty) and,
complemented with additional field campaigns, this data set confirms through
observations the ubiquitous presence of reactive iodine chemistry in the
global marine environment. We use a global model with organic (CH3I,
CH2ICl, CH2I2 and CH2IBr)
and inorganic (HOI and I2) iodine
ocean emissions to investigate the contribution of the different iodine
source gases to the budget of IO in the global MBL. In agreement with
previous estimates, our results indicate that, globally averaged, the abiotic
precursors contribute about 75 % to the IO budget. However, this
work reveals a strong geographical pattern in the contribution of organic vs.
inorganic precursors to reactive iodine in the global MBL. |
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