Regeneration of Fe(II) during EIFeX and SOFeX

Investigations into Fe(II) cycling during two Southern Ocean mesoscale iron enrichment experiments, SOFeX and EIFeX, clearly show the importance of Fe(II) to iron speciation during these experiments. In both cases the added Fe(II) persisted significantly longer than its expected oxidation time indic...

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Bibliographic Details
Published in:Geophysical Research Letters
Main Authors: Croot, Peter, Bluhm, Katrin, Schlosser, Christian, Streu, Peter, Breitbarth, Eike, Frew, R., Van Ardelan, M.
Format: Article in Journal/Newspaper
Language:English
Published: AGU (American Geophysical Union) 2008
Subjects:
Southern Ocean
Online Access:https://oceanrep.geomar.de/id/eprint/4230/
https://oceanrep.geomar.de/id/eprint/4230/1/2008GL035063.pdf
https://doi.org/10.1029/2008GL035063
Description
Summary:Investigations into Fe(II) cycling during two Southern Ocean mesoscale iron enrichment experiments, SOFeX and EIFeX, clearly show the importance of Fe(II) to iron speciation during these experiments. In both cases the added Fe(II) persisted significantly longer than its expected oxidation time indicating a significant Fe reduction process at work. During EIFeX diel studies showed a strong photochemically induced cycle in Fe(II) production in sunlit surface waters. Our results suggest that the photochemical cycling of iron may also be important in unfertilized waters of the Southern Ocean.

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