Regeneration of Fe(II) during EIFeX and SOFeX

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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Veröffentlicht in:GEOPHYSICAL RESEARCH LETTERS 2008-10, Vol.35 (19), p.n/a
Hauptverfasser: Croot, P. L., Bluhm, K., Schlosser, C., Streu, P., Breitbarth, E., Frew, R., Van Ardelan, M.
Format: Artikel
Sprache:eng
Schlagworte:
Chemical Sciences
diatoms
Earth sciences
Earth, ocean, space
Exact sciences and technology
iron enrichment
Kemi
Marine
photochemistry
primary productivity
Southern Ocean
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Zusammenfassung: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.
ISSN:0094-8276
1944-8007
DOI:10.1029/2008GL035063