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| Titel |
Iodine observed in new particle formation events in the Arctic atmosphere during ACCACIA |
| VerfasserIn |
J. D. Allan, P. I. Williams, J. Najera, J. D. Whitehead, M. J. Flynn, J. W. Taylor, D. Liu, E. Darbyshire, L. J. Carpenter, R. Chance, S. J. Andrews, S. C. Hackenberg, G. McFiggans |
| 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. 10 ; Nr. 15, no. 10 (2015-05-21), S.5599-5609 |
| Datensatznummer |
250119744
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| Publikation (Nr.) |
 copernicus.org/acp-15-5599-2015.pdf |
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| Zusammenfassung |
| Accurately accounting for new particle formation (NPF) is crucial to our
ability to predict aerosol number concentrations in many environments and
thus cloud properties, which is in turn vital in simulating radiative
transfer and climate. Here we present an analysis of NPF events observed in
the Greenland Sea during the summertime as part of the Aerosol-Cloud
Coupling And Climate Interactions in the Arctic (ACCACIA) project. While NPF
events have been reported in the Arctic before, we were able, for the first
time, to detect iodine in the growing particles using an Aerosol Mass
Spectrometer (AMS) during a persistent event in the region of the coastal
sea-ice near Greenland. Given the potency of iodine as a nucleation
precursor, the results imply that iodine was responsible for the initial
NPF, a phenomenon that has been reported at lower latitudes and associated
with molecular iodine emissions from coastal macroalgae. The initial source
of iodine in this instance is not clear, but it was associated with air
originating approximately 1 day previously over melting coastal sea-ice.
These results show that atmospheric models must consider iodine as a source
of new particles in addition to established precursors such as sulfur
compounds. |
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