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

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

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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: Uppsala universitet, Luft-, vatten- och landskapslära 2013
Subjects:
Natural Sciences
Naturvetenskap
Arctic
Arctic Ocean
Nordic Seas
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-213488
https://doi.org/10.1038/srep02685
Description
Summary:Concentrations and species of iodine isotopes (I-127 and I-129) provide vital information about iodine geochemistry, environmental conditions and water masses exchange in oceans. Despite extensive investigations of anthropogenic I-129 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 I-129 and I-127, and their species (iodide and iodate) in surface water transect along the northeastern Atlantic between 30 degrees and 50 degrees N. The results show iodate as the predominant species in the analyzed marine waters for both I-127 and I-129. Despite the rather constant ratios of I-127(-)/(IO3-)-I-127, the I-129(-)/(IO3-)-I-129 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 I-129 in ocean environments and impact on climate at the ocean boundary layer.

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