Iodine isotopes species fingerprinting environmental conditions in surface water along the northeastern Atlantic Ocean

Concentrations and species of iodine isotopes (127I and 129I) provide vital information about iodine geochemistry, environmental conditions and water masses exchange in oceans. Despite extensive investigations of anthropogenic 129I in the Arctic Ocean and the Nordic Seas, concentrations of the isoto...

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Bibliographic Details
Published in:Scientific Reports
Main Authors: He, Peng, Hou, Xiaolin, Aldahan, Ala, Possnert, Göran, Yi, Peng
Format: Article in Journal/Newspaper
Language:English
Published: 2013
Subjects:
Marine chemistry
Environmental Monitoring
Geochemistry
/dk/atira/pure/sustainabledevelopmentgoals/life_below_water
name=SDG 14 - Life Below Water
Arctic Ocean
Nordic Seas
Online Access:https://orbit.dtu.dk/en/publications/7722d04a-4d36-4bec-97e0-5074c4bb60d4
https://doi.org/10.1038/srep02685
Description
Summary:Concentrations and species of iodine isotopes (127I and 129I) provide vital information about iodine geochemistry, environmental conditions and water masses exchange in oceans. Despite extensive investigations of anthropogenic 129I in the Arctic Ocean and the Nordic Seas, concentrations of the isotope in the Atlantic Ocean are, however, still unknown. We here present first data on 129I and 127I, and their species (iodide and iodate) in surface water transect along the northeastern Atlantic between 30° and 50°N. The results show iodate as the predominant species in the analyzed marine waters for both 127I and 129I. Despite the rather constant ratios of 127I−/127IO3−, the 129I−/129IO3− values reveal variations that apparently response to sources, environmental conditions and residence time. These findings provide a new tracer approach that will strongly enhance the application of anthropogenic 129I in ocean environments and impact on climate at the ocean boundary layer.

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