Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern Ocean

Article

Bibliographic Details
Authors: Tanhua, Toste, Hoppema, Mario, Jones, Elizabeth M., Stöven, Tim, Hauck, Judith, González-Dávila, Melchor, Santana-Casiano, Juana Magdalena, Álvarez-Rodríguez, Marta, Strass, V.H.
Format: article
Status:Versión aceptada para publicación
Publication Date:2017
Country:España
Institution:Consejo Superior de Investigaciones Científicas (CSIC)
Repository:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/316470
Online Access:http://hdl.handle.net/10261/316470
Access Level:Open access
Keyword:Medio Marino
Centro Oceanográfico de A Coruña
Tracers
Carbon cycle
Southern ocean
carbon cycle
tracers
carbon
ventilation
energy
Anthropogenic effects
Chemical oceanography
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oai_identifier_str oai:digital.csic.es:10261/316470
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spelling Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern OceanTanhua, TosteHoppema, MarioJones, Elizabeth M.Stöven, TimHauck, JudithGonzález-Dávila, MelchorSantana-Casiano, Juana MagdalenaÁlvarez-Rodríguez, MartaStrass, V.H.Medio MarinoCentro Oceanográfico de A CoruñaTracersCarbon cycleSouthern oceancarbon cycletracerscarbonventilationenergyAnthropogenic effectsChemical oceanographyArticleThe Southern Ocean is the most important area of anthropogenic carbon (Cant) uptake in the world ocean, only rivalled in importance by the North Atlantic Ocean. Significant variability on decadal time-scales in the uptake of Cant in the Southern Ocean has been observed and modelled, likely with consequences for the interior ocean storage of Cant in the region, and implications for the global carbon budget. Here we use eight cruises between 1973 and 2012 to assess decadal variability in Cant storage rates in the southeast Atlantic sector of the Southern Ocean. For this we employed the extended multiple linear regression (eMLR) method. We relate variability in DIC (dissolved inorganic carbon) storage, which is assumed to equal anthropogenic carbon storage, to changes in ventilation as observed from repeat measurements of transient tracers. Within the Antarctic Intermediate Water (AAIW) layer, which is the dominant transport conduit for Cant into the interior ocean, moderate Cant storage rates were found without any clear temporal trend. In Subantarctic Mode Water (SAMW), a less dense water mass found north of the Subantarctic Front and above AAIW, high storage rates of Cant were observed up to about 2005 but lower rates in more recent times. The transient tracer data suggest a significant speed-up of ventilation in the summer warmed upper part of AAIW between 1998 and 2012, which is consistent with the high storage rate of Cant. A shift of more northern Cant storage to more southern storage in near surface waters was detected in the early 2000s. Beneath the AAIW the eMLR method as applied here did not detect significant storage of Cant. However, the presence of the transient tracer CFC-12 all through the water column suggests that some Cant should be present, but at concentrations not reliably quantifiable. The observed temporal variability in the interior ocean seems at a first glance to be out of phase with observed surface ocean Cant fluxes, but this can be explained by the time delay for the surface ocean signal to manifest itself in the interior of the ocean.SIConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202320232017info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/316470reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#ANT-XXVIII/3 (2012) and GLODA Pv2Centro Oceanográfico de A Coruñahttps://www.sciencedirect.com/science/article/pii/S0967064516303046Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3164702026-05-22T06:33:51Z
dc.title.none.fl_str_mv Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern Ocean
title Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern Ocean
spellingShingle Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern Ocean
Tanhua, Toste
Medio Marino
Centro Oceanográfico de A Coruña
Tracers
Carbon cycle
Southern ocean
carbon cycle
tracers
carbon
ventilation
energy
Anthropogenic effects
Chemical oceanography
title_short Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern Ocean
title_full Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern Ocean
title_fullStr Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern Ocean
title_full_unstemmed Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern Ocean
title_sort Temporal changes in ventilation and the carbonate system in the Atlantic sector of the Southern Ocean
dc.creator.none.fl_str_mv Tanhua, Toste
Hoppema, Mario
Jones, Elizabeth M.
Stöven, Tim
Hauck, Judith
González-Dávila, Melchor
Santana-Casiano, Juana Magdalena
Álvarez-Rodríguez, Marta
Strass, V.H.
author Tanhua, Toste
author_facet Tanhua, Toste
Hoppema, Mario
Jones, Elizabeth M.
Stöven, Tim
Hauck, Judith
González-Dávila, Melchor
Santana-Casiano, Juana Magdalena
Álvarez-Rodríguez, Marta
Strass, V.H.
author_role author
author2 Hoppema, Mario
Jones, Elizabeth M.
Stöven, Tim
Hauck, Judith
González-Dávila, Melchor
Santana-Casiano, Juana Magdalena
Álvarez-Rodríguez, Marta
Strass, V.H.
author2_role author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Medio Marino
Centro Oceanográfico de A Coruña
Tracers
Carbon cycle
Southern ocean
carbon cycle
tracers
carbon
ventilation
energy
Anthropogenic effects
Chemical oceanography
topic Medio Marino
Centro Oceanográfico de A Coruña
Tracers
Carbon cycle
Southern ocean
carbon cycle
tracers
carbon
ventilation
energy
Anthropogenic effects
Chemical oceanography
description Article
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/10261/316470
url http://hdl.handle.net/10261/316470
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
ANT-XXVIII/3 (2012) and GLODA Pv2
Centro Oceanográfico de A Coruña
https://www.sciencedirect.com/science/article/pii/S0967064516303046
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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 15,812429

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