A ventilation-based framework to explain the regeneration - scavenging balance of iron in the Ocean

Tagliabue, A., Williams, R. G., Rogan, N., Achterberg, Eric P. and Boyd, O. (2014) A ventilation-based framework to explain the regeneration - scavenging balance of iron in the Ocean Geophysical Research Letters, 41 (20). pp. 7227-7236. DOI 10.1002/2014GL061066.

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Abstract

Our understanding of the processes driving the patterns of dissolved iron (DFe) in the ocean
interior, either in observations or models, is complicated by the combined influences of subduction from
the surface mixed layer, notable subsurface sources, regeneration, and scavenging loss. We describe a
ventilation-based framework to quantify these processes in a global ocean biogeochemical model including
diagnostics along potential density surfaces. There is a prevailing control of subsurface DFe by the subduction of
surface DFe as preformed DFe augmented by benthic sources of DFe from hydrothermal activity and sediments.
Unlike phosphate, there is often a first-order balance with a near cancelation between regeneration and
scavenging with the remaining “net regeneration” controlled by the ventilation of surface excesses in Fe-binding
ligands. This DFe framework provides a more stringent test of how the total DFe distribution is mechanistically
controlled within a model and may be subsequently used to interpret observed DFe distributions.

Document Type: Article
Additional Information: WOS:000345343100031
Keywords: iron; ocean; ventilation; biogeochemistry
Research affiliation: OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-CH Chemical Oceanography
OceanRep > The Future Ocean - Cluster of Excellence
Refereed: Yes
DOI etc.: 10.1002/2014GL061066
ISSN: 0094-8276
Projects: Future Ocean
Date Deposited: 24 Sep 2014 10:51
Last Modified: 10 Apr 2017 08:25
URI: http://eprints.uni-kiel.de/id/eprint/25634

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