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

A ventilation-based framework to explain the regeneration - scavenging balance of iron in the ocean
A ventilation-based framework to explain the regeneration - scavenging balance of iron in the ocean
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 a first order balance with a near cancellation 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.
Iron, Ocean, Ventilation, Biogeochemistry
0094-8276
7227-7236
Tagliabue, Alessandro
23ecb1dd-3cf4-46eb-b059-637a04f2439b
Williams, Richard G.
2155309e-1c07-4365-b46a-04baeb2fb63c
Rogan, Nicholas
efbb3699-9ab1-4963-9760-0c58709d9853
Achterberg, Eric P.
685ce961-8c45-4503-9f03-50f6561202b9
Boyd, P.W.
1bac0dba-780e-4c14-93e0-4f707061532d
Tagliabue, Alessandro
23ecb1dd-3cf4-46eb-b059-637a04f2439b
Williams, Richard G.
2155309e-1c07-4365-b46a-04baeb2fb63c
Rogan, Nicholas
efbb3699-9ab1-4963-9760-0c58709d9853
Achterberg, Eric P.
685ce961-8c45-4503-9f03-50f6561202b9
Boyd, P.W.
1bac0dba-780e-4c14-93e0-4f707061532d

Tagliabue, Alessandro, Williams, Richard G., Rogan, Nicholas, Achterberg, Eric P. and Boyd, P.W. (2014) A ventilation-based framework to explain the regeneration - scavenging balance of iron in the ocean. Geophysical Research Letters, 41 (20), 7227-7236. (doi:10.1002/2014GL061066).

Record type: Article

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 a first order balance with a near cancellation 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.

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More information

Accepted/In Press date: October 2014
Published date: October 2014
Keywords: Iron, Ocean, Ventilation, Biogeochemistry
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 369709
URI: http://eprints.soton.ac.uk/id/eprint/369709
ISSN: 0094-8276
PURE UUID: 7fb946bc-49f0-4af2-b352-5aa0da30651a

Catalogue record

Date deposited: 06 Oct 2014 08:51
Last modified: 15 Jul 2019 21:42

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