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Issue 8, 2014
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The distribution of iodide at the sea surface

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Abstract

Recent studies have highlighted the impact of sea surface iodide concentrations on the deposition of ozone to the sea surface and the sea to air flux of reactive iodine. The use of models to predict this flux demands accurate, spatially distributed sea surface iodide concentrations, but to date, the observational data required to support this is sparse and mostly arises from independent studies conducted on small geographical and temporal scales. We have compiled the available measurements of sea surface iodide to produce a data set spanning latitudes from 69°S to 66°N, which reveals a coherent, large scale distribution pattern, with highest concentrations observed in tropical waters. Relationships between iodide concentration and more readily available parameters (chlorophyll, nitrate, sea surface temperature, salinity, mixed layer depth) are evaluated as tools to predict iodide concentration. Of the variables tested, sea surface temperature is the strongest predictor of iodide concentration. Nitrate was also strongly inversely associated with iodide concentration, but chlorophyll-a was not.

Graphical abstract: The distribution of iodide at the sea surface

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Article information


Submitted
04 Mar 2014
Accepted
03 Jun 2014
First published
03 Jun 2014

Environ. Sci.: Processes Impacts, 2014,16, 1841-1859
Article type
Critical Review

The distribution of iodide at the sea surface

R. Chance, A. R. Baker, L. Carpenter and T. D. Jickells, Environ. Sci.: Processes Impacts, 2014, 16, 1841
DOI: 10.1039/C4EM00139G

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