dc.contributor.author |
Tagliabue, A
|
|
dc.contributor.author |
Sallée, J-P
|
|
dc.contributor.author |
Bowie, AR
|
|
dc.contributor.author |
Lévy, M
|
|
dc.contributor.author |
Swart, S
|
|
dc.contributor.author |
Boyd, PW
|
|
dc.date.accessioned |
2014-08-15T12:55:59Z |
|
dc.date.available |
2014-08-15T12:55:59Z |
|
dc.date.issued |
2014-04 |
|
dc.identifier.citation |
Tagliabue, A, Sallée, J-P, Bowie, A.R, Lévy, M, Swart, S and Boyd, P.W. 2014. Surface water iron supplies in the Southern Ocean sustained by deep winter mixing. Nature Geoscience, vol. 7(4), pp 314-320 |
en_US |
dc.identifier.issn |
1752-0894 |
|
dc.identifier.uri |
http://www.nature.com/ngeo/journal/v7/n4/full/ngeo2101.html
|
|
dc.identifier.uri |
http://hdl.handle.net/10204/7583
|
|
dc.description |
Copyright: 2014 Nature Publishing Group. This is an ABSTRACT ONLY. The definitive version is published in Nature Geoscience, vol. 7(4), pp 314-320 |
en_US |
dc.description.abstract |
Low levels of iron limit primary productivity across much of the Southern Ocean. At the basin scale, most dissolved iron is supplied to surfacewaters from subsurface reservoirs, because land inputs are spatially limited. Deep mixing in winter together with year-round di density surfaces, known as diapycnal dihe main physical processes that carry iron-laden subsurface waters to the surface. Here, we analyse data on dissolved iron concentrations in the top 1,000m of the Southern Ocean, taken from all known and available cruises to date, together with hydrographic data to determine the relative importance of deep winter mixing and diapycnal disolved iron fluxes at the basin scale. Using information on the vertical distribution of iron we show that deep winter mixing supplies ten times more iron to the surface ocean each year, on average, than diapycnal diffusion. We further show that the amount of iron supplied to the surface ocean by winter mixing matches that used by phytoplankton, according to satellite-based estimates of phytoplankton iron utilization. Biological observations from the sub-Antarctic sector suggest that following the depletion of this wintertime iron pulse, intense iron recycling sustains productivity over the subsequent spring and summer. We conclude that winter mixing and surface water iron recycling are important drivers of temporal variations in Southern Ocean primary production. |
en_US |
dc.language.iso |
en |
en_US |
dc.publisher |
Nature Publishing Group |
en_US |
dc.relation.ispartofseries |
Workflow;12740 |
|
dc.subject |
Southern Ocean |
en_US |
dc.subject |
Iron-laden subsurface waters |
en_US |
dc.subject |
Southern Ocean carbon cycling |
en_US |
dc.title |
Surface water iron supplies in the Southern Ocean sustained by deep winter mixing |
en_US |
dc.type |
Article |
en_US |
dc.identifier.apacitation |
Tagliabue, A., Sallée, J., Bowie, A., Lévy, M., Swart, S., & Boyd, P. (2014). Surface water iron supplies in the Southern Ocean sustained by deep winter mixing. http://hdl.handle.net/10204/7583 |
en_ZA |
dc.identifier.chicagocitation |
Tagliabue, A, J-P Sallée, AR Bowie, M Lévy, S Swart, and PW Boyd "Surface water iron supplies in the Southern Ocean sustained by deep winter mixing." (2014) http://hdl.handle.net/10204/7583 |
en_ZA |
dc.identifier.vancouvercitation |
Tagliabue A, Sallée J, Bowie A, Lévy M, Swart S, Boyd P. Surface water iron supplies in the Southern Ocean sustained by deep winter mixing. 2014; http://hdl.handle.net/10204/7583. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Tagliabue, A
AU - Sallée, J-P
AU - Bowie, AR
AU - Lévy, M
AU - Swart, S
AU - Boyd, PW
AB - Low levels of iron limit primary productivity across much of the Southern Ocean. At the basin scale, most dissolved iron is supplied to surfacewaters from subsurface reservoirs, because land inputs are spatially limited. Deep mixing in winter together with year-round di density surfaces, known as diapycnal dihe main physical processes that carry iron-laden subsurface waters to the surface. Here, we analyse data on dissolved iron concentrations in the top 1,000m of the Southern Ocean, taken from all known and available cruises to date, together with hydrographic data to determine the relative importance of deep winter mixing and diapycnal disolved iron fluxes at the basin scale. Using information on the vertical distribution of iron we show that deep winter mixing supplies ten times more iron to the surface ocean each year, on average, than diapycnal diffusion. We further show that the amount of iron supplied to the surface ocean by winter mixing matches that used by phytoplankton, according to satellite-based estimates of phytoplankton iron utilization. Biological observations from the sub-Antarctic sector suggest that following the depletion of this wintertime iron pulse, intense iron recycling sustains productivity over the subsequent spring and summer. We conclude that winter mixing and surface water iron recycling are important drivers of temporal variations in Southern Ocean primary production.
DA - 2014-04
DB - ResearchSpace
DP - CSIR
KW - Southern Ocean
KW - Iron-laden subsurface waters
KW - Southern Ocean carbon cycling
LK - https://researchspace.csir.co.za
PY - 2014
SM - 1752-0894
T1 - Surface water iron supplies in the Southern Ocean sustained by deep winter mixing
TI - Surface water iron supplies in the Southern Ocean sustained by deep winter mixing
UR - http://hdl.handle.net/10204/7583
ER -
|
en_ZA |