Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar front

16 pages, 7 figures, 4 tables

Detalhes bibliográficos
Autores: Puigcorbé, Viena, Roca-Martí, Montserrat, Masqué, Pere, Benítez-Nelson, Claudia, van der Loeff, Michiel Rutgers, Laglera, Luis M., Bracher, Astrid, Cheah, Wee, Strass, Volker, Hoppema, Mario, Santos-Echeandía, Juan, Hunt, Brian P. V., Pakhomov, Evgeny A., Klaas, Christine
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2017
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/306286
Acesso em linha:http://hdl.handle.net/10261/306286
Access Level:acceso abierto
Palavra-chave:Particulate organic carbon export
Thorium
Southern Ocean
Antarctic Circumpolar Current
Polar Front
Export efficiency
Transfer efficiency
Plankton community
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spelling Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar frontPuigcorbé, VienaRoca-Martí, MontserratMasqué, PereBenítez-Nelson, Claudiavan der Loeff, Michiel RutgersLaglera, Luis M.Bracher, AstridCheah, WeeStrass, VolkerHoppema, MarioSantos-Echeandía, JuanHunt, Brian P. V.Pakhomov, Evgeny A.Klaas, ChristineParticulate organic carbon exportThoriumSouthern OceanAntarctic Circumpolar CurrentPolar FrontExport efficiencyTransfer efficiencyPlankton community16 pages, 7 figures, 4 tablesThe vertical distribution of 234Th was measured along the 10°E meridian between 44°S and 53°S in the Antarctic Circumpolar Current (ACC) during the austral summer of 2012. The overarching goal of this work was to estimate particulate organic carbon (POC) export across three fronts: the Sub-Antarctic Front (SAF), the Antarctic Polar Front (APF) and the Southern Polar Front (SPF). Steady state export fluxes of 234Th in the upper 100 m ranged from 1600 to 2600 dpm m−2 d−1, decreasing with increasing latitude. Using large particle (>53 μm) C/234Th ratios, the 234Th-derived POC fluxes at 100 m ranged from 25 to 41 mmol C m−2 d−1. Observed C/234Th ratios decreased with increasing depth north of the APF while south of the APF, ratios remained similar or even increased with depth. These changes in C/234Th ratios are likely due to differences in the food web. Indeed, satellite images, together with macronutrients and dissolved iron concentrations suggest two different planktonic community structures north and south of the APF. Our results indicate that higher ratios of POC flux at 100 m to primary production occurred in nanophytoplankton dominated surface waters, where primary production rates were lower. Satellite images prior to the expedition suggest that the higher export efficiencies obtained in the northern half of the transect may be the result of the decoupling between production and export (Buesseler 1998). Transfer efficiencies to 400 m, i.e. the fraction of exported POC that reached 400 m, were found to be higher south of the APF, where diatoms were dominant and salps largely abundant. This suggests different remineralization pathways of sinking particles, influencing the transfer efficiency of exported POC to depth.Financial support for this project was provided by the Ministerio de Ciencia e Innovación (CTM2011-14027-E, Spain) and the Generalitat de Catalunya to the research group MERS (2014 SGR-1365). VP and MR-M have been funded by Ph.D. fellowships from the Spanish Government (AP-2009-4733 and AP2010-2510, respectively). The participation of LML and JSE was funded by the MINECO of Spain (CGL2010-11846-E). Funding to WC and AB was supplied partly by the Helmholtz Innovation Fund Phytooptics (VH-NG-300). MH was partly supported by the DFG in the framework of the priority program "Antarctic Research with comparative investigations in Arctic ice areas" by a Grant HO 4680/1.Peer reviewedElsevierMinisterio de Ciencia e Innovación (España)Generalitat de CatalunyaMinisterio de Economía y Competitividad (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttp://hdl.handle.net/10261/306286reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MICINN//CTM2011-14027-Einfo:eu-repo/grantAgreement/ME//AP2010-2510info:eu-repo/grantAgreement/MICINN//CGL2010-11846-Einfo:eu-repo/grantAgreement/ME//AP2009-4733https://doi.org/10.1016/j.dsr2.2016.05.016Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3062862026-05-22T06:33:51Z
dc.title.none.fl_str_mv Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar front
title Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar front
spellingShingle Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar front
Puigcorbé, Viena
Particulate organic carbon export
Thorium
Southern Ocean
Antarctic Circumpolar Current
Polar Front
Export efficiency
Transfer efficiency
Plankton community
title_short Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar front
title_full Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar front
title_fullStr Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar front
title_full_unstemmed Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar front
title_sort Particulate organic carbon export across the antarctic circumpolar current at 10°e: differences between north and south of the antarctic polar front
dc.creator.none.fl_str_mv Puigcorbé, Viena
Roca-Martí, Montserrat
Masqué, Pere
Benítez-Nelson, Claudia
van der Loeff, Michiel Rutgers
Laglera, Luis M.
Bracher, Astrid
Cheah, Wee
Strass, Volker
Hoppema, Mario
Santos-Echeandía, Juan
Hunt, Brian P. V.
Pakhomov, Evgeny A.
Klaas, Christine
author Puigcorbé, Viena
author_facet Puigcorbé, Viena
Roca-Martí, Montserrat
Masqué, Pere
Benítez-Nelson, Claudia
van der Loeff, Michiel Rutgers
Laglera, Luis M.
Bracher, Astrid
Cheah, Wee
Strass, Volker
Hoppema, Mario
Santos-Echeandía, Juan
Hunt, Brian P. V.
Pakhomov, Evgeny A.
Klaas, Christine
author_role author
author2 Roca-Martí, Montserrat
Masqué, Pere
Benítez-Nelson, Claudia
van der Loeff, Michiel Rutgers
Laglera, Luis M.
Bracher, Astrid
Cheah, Wee
Strass, Volker
Hoppema, Mario
Santos-Echeandía, Juan
Hunt, Brian P. V.
Pakhomov, Evgeny A.
Klaas, Christine
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Generalitat de Catalunya
Ministerio de Economía y Competitividad (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Particulate organic carbon export
Thorium
Southern Ocean
Antarctic Circumpolar Current
Polar Front
Export efficiency
Transfer efficiency
Plankton community
topic Particulate organic carbon export
Thorium
Southern Ocean
Antarctic Circumpolar Current
Polar Front
Export efficiency
Transfer efficiency
Plankton community
description 16 pages, 7 figures, 4 tables
publishDate 2017
dc.date.none.fl_str_mv 2017
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/306286
url http://hdl.handle.net/10261/306286
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
#PLACEHOLDER_PARENT_METADATA_VALUE#
info:eu-repo/grantAgreement/MICINN//CTM2011-14027-E
info:eu-repo/grantAgreement/ME//AP2010-2510
info:eu-repo/grantAgreement/MICINN//CGL2010-11846-E
info:eu-repo/grantAgreement/ME//AP2009-4733
https://doi.org/10.1016/j.dsr2.2016.05.016
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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