Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply

Climate change is projected to significantly alter the delivery (stratification, boundarycurrents, aridification of landmasses, glacial melt) of iron to the Southern Ocean. Wereport the most comprehensive suite of biogeochemical iron budgets to date for threecontrasting sites in subantarctic and pol...

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Published in:Global Biogeochemical Cycles
Main Authors: Bowie, AR, Lannuzel, D, Remenyi, TA, Wagener, T, Lam, PJ, Boyd, PW, Guieu, C, Townsend, AT, Trull, T
Format: Article in Journal/Newspaper
Language:English
Published: Amer Geophysical Union 2009
Subjects:
Earth Sciences
Oceanography
Chemical Oceanography
Southern Ocean
Online Access:http://www.agu.org/
https://doi.org/10.1029/2009GB003500
http://ecite.utas.edu.au/62060
id ftunivtasecite:oai:ecite.utas.edu.au:62060
record_format openpolar
spelling ftunivtasecite:oai:ecite.utas.edu.au:62060 2023-05-15T18:24:53+02:00 Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply Bowie, AR Lannuzel, D Remenyi, TA Wagener, T Lam, PJ Boyd, PW Guieu, C Townsend, AT Trull, T 2009 application/pdf http://www.agu.org/ https://doi.org/10.1029/2009GB003500 http://ecite.utas.edu.au/62060 en eng Amer Geophysical Union http://ecite.utas.edu.au/62060/1/2009BOWIE.pdf http://dx.doi.org/10.1029/2009GB003500 Bowie, AR and Lannuzel, D and Remenyi, TA and Wagener, T and Lam, PJ and Boyd, PW and Guieu, C and Townsend, AT and Trull, T, Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply, Global Biogeochemical Cycles, 23, (4) Article GB4034. ISSN 0886-6236 (2009) [Refereed Article] http://ecite.utas.edu.au/62060 Earth Sciences Oceanography Chemical Oceanography Refereed Article PeerReviewed 2009 ftunivtasecite https://doi.org/10.1029/2009GB003500 2019-12-13T21:32:23Z Climate change is projected to significantly alter the delivery (stratification, boundarycurrents, aridification of landmasses, glacial melt) of iron to the Southern Ocean. Wereport the most comprehensive suite of biogeochemical iron budgets to date for threecontrasting sites in subantarctic and polar frontal waters south of Australia. Distinctregional environments were responsible for differences in the mode and strength of ironsupply mechanisms, with higher iron stocks and fluxes observed in surface northernsubantarctic waters, where atmospheric iron fluxes were greater. Subsurface waterssoutheast of Tasmania were also enriched with particulate iron, manganese andaluminum, indicative of a strong advective source from shelf sediments. Subantarcticphytoplankton blooms are thus driven by both seasonal iron supply from southwardadvection of subtropical waters and by wind-blown dust deposition, resulting in a strongdecoupling of iron and nutrient cycles. We discuss the broader global significance ouriron budgets for other ocean regions sensitive to climate-driven changes in iron supply. Article in Journal/Newspaper Southern Ocean eCite UTAS (University of Tasmania) Southern Ocean Global Biogeochemical Cycles 23 4 n/a n/a
institution Open Polar
collection eCite UTAS (University of Tasmania)
op_collection_id ftunivtasecite
language English
topic Earth Sciences
Oceanography
Chemical Oceanography
spellingShingle Earth Sciences
Oceanography
Chemical Oceanography
Bowie, AR
Lannuzel, D
Remenyi, TA
Wagener, T
Lam, PJ
Boyd, PW
Guieu, C
Townsend, AT
Trull, T
Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply
topic_facet Earth Sciences
Oceanography
Chemical Oceanography
description Climate change is projected to significantly alter the delivery (stratification, boundarycurrents, aridification of landmasses, glacial melt) of iron to the Southern Ocean. Wereport the most comprehensive suite of biogeochemical iron budgets to date for threecontrasting sites in subantarctic and polar frontal waters south of Australia. Distinctregional environments were responsible for differences in the mode and strength of ironsupply mechanisms, with higher iron stocks and fluxes observed in surface northernsubantarctic waters, where atmospheric iron fluxes were greater. Subsurface waterssoutheast of Tasmania were also enriched with particulate iron, manganese andaluminum, indicative of a strong advective source from shelf sediments. Subantarcticphytoplankton blooms are thus driven by both seasonal iron supply from southwardadvection of subtropical waters and by wind-blown dust deposition, resulting in a strongdecoupling of iron and nutrient cycles. We discuss the broader global significance ouriron budgets for other ocean regions sensitive to climate-driven changes in iron supply.
format Article in Journal/Newspaper
author Bowie, AR
Lannuzel, D
Remenyi, TA
Wagener, T
Lam, PJ
Boyd, PW
Guieu, C
Townsend, AT
Trull, T
author_facet Bowie, AR
Lannuzel, D
Remenyi, TA
Wagener, T
Lam, PJ
Boyd, PW
Guieu, C
Townsend, AT
Trull, T
author_sort Bowie, AR
title Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply
title_short Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply
title_full Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply
title_fullStr Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply
title_full_unstemmed Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply
title_sort biogeochemical iron budgets of the southern ocean south of australia: decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply
publisher Amer Geophysical Union
publishDate 2009
url http://www.agu.org/
https://doi.org/10.1029/2009GB003500
http://ecite.utas.edu.au/62060
geographic Southern Ocean
geographic_facet Southern Ocean
genre Southern Ocean
genre_facet Southern Ocean
op_relation http://ecite.utas.edu.au/62060/1/2009BOWIE.pdf
http://dx.doi.org/10.1029/2009GB003500
Bowie, AR and Lannuzel, D and Remenyi, TA and Wagener, T and Lam, PJ and Boyd, PW and Guieu, C and Townsend, AT and Trull, T, Biogeochemical iron budgets of the Southern Ocean south of Australia: Decoupling of iron and nutrient cycles in the subantarctic zone by the summertime supply, Global Biogeochemical Cycles, 23, (4) Article GB4034. ISSN 0886-6236 (2009) [Refereed Article]
http://ecite.utas.edu.au/62060
op_doi https://doi.org/10.1029/2009GB003500
container_title Global Biogeochemical Cycles
container_volume 23
container_issue 4
container_start_page n/a
op_container_end_page n/a
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