Iodine speciation and deposition fluxes from the marine atmosphere

Baker, A. R., Tunnicliffe, C. and Jickells, T. D. (2001) Iodine speciation and deposition fluxes from the marine atmosphere. Journal of Geophysical Research, 106 (D22). pp. 28743-28749. ISSN 2156-2202

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Abstract

The concentration and speciation of iodine have been determined in wet and dry deposition at a coastal site over a 15-month period. Deposition fluxes in rain (2.7 μmol m−2 yr−1) and aerosol (3.6–6.5 μmol m−2 yr−1) are the major routes for removal of iodine from the marine atmosphere onto the Earth's surface, with only a minor contribution from direct deposition of methyl iodide (0.003–0.17 μmol m−2 yr−1). Iodate (IO3−) is often considered to be the only species of iodine that is permanently removed to the aerosol phase, and IO3− may therefore be expected to be the dominant form of iodine in precipitation. However, iodide (I−) was found to constitute a significant fraction (5–100%) of iodine in both rain and aerosol. This implies that the rates of iodate formation and iodide volatilization (through reaction with hypohalous acids) are relatively slow. A third pool of aerosol iodine (nonvolatile organic compounds) may also contribute to removal of iodine from the atmosphere in dry or wet deposition.

Item Type: Article
Uncontrolled Keywords: sdg 14 - life below water ,/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
Faculty \ School: Faculty of Science > School of Environmental Sciences
University of East Anglia Research Groups/Centres > Theme - ClimateUEA
UEA Research Groups: Faculty of Science > Research Groups > Centre for Ocean and Atmospheric Sciences
Faculty of Science > Research Groups > Marine and Atmospheric Sciences (former - to 2017)
Faculty of Science > Research Groups > Climate, Ocean and Atmospheric Sciences (former - to 2017)
Related URLs:
Depositing User: Rosie Cullington
Date Deposited: 30 Mar 2011 15:01
Last Modified: 06 Feb 2025 03:51
URI: https://ueaeprints.uea.ac.uk/id/eprint/27695
DOI: 10.1029/2000JD000004

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