δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2

Autores
Campos, Marília C.; Mazur Chiessi, Cristiano; Voigt, Ines; Piola, Alberto Ricardo; Kuhnert, Henning; Mulitza, Stefan
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Abrupt millennial-scale climate change events of the last deglaciation (i.e. Heinrich Stadial 1 and the Younger Dryas) were accompanied by marked increases in atmospheric CO2 (CO2atm) and decreases in its stable carbon isotopic ratios (δ13C), i.e. δ13CO2atm, presumably due to outgassing from the ocean. However, information on the preceding Heinrich Stadials during the last glacial period is scarce. Here we present δ13C records from two species of planktonic foraminifera from the western South Atlantic that reveal major decreases (up to 1%) during Heinrich Stadials 3 and 2. These δ13C decreases are most likely related to millennial-scale periods of weakening of the Atlantic meridional overturning circulation and the consequent increase (decrease) in CO2atm (δ13CO2atm). We hypothesise two mechanisms that could account for the decreases observed in our records, namely strengthening of Southern Ocean deep-water ventilation and weakening of the biological pump. Additionally, we suggest that air-sea gas exchange could have contributed to the observed δ13C decreases. Together with other lines of evidence, our data are consistent with the hypothesis that the CO2 added to the atmosphere during abrupt millennial-scale climate change events of the last glacial period also originated in the ocean and reached the atmosphere by outgassing. The temporal evolution of δ13C during Heinrich Stadials 3 and 2 in our records is characterized by two relative minima separated by a relative maximum. This "w structure" is also found in North Atlantic and South American records, further suggesting that such a structure is a pervasive feature of Heinrich Stadial 2 and, possibly, also Heinrich Stadial 3.
Fil: Campos, Marília C.. Universidade do Sao Paulo. Facultad de Filosofía, Letras e Ciencias Humanas; Brasil
Fil: Mazur Chiessi, Cristiano. Universidade do Sao Paulo. Facultad de Filosofía, Letras e Ciencias Humanas; Brasil
Fil: Voigt, Ines. Universitat Bremen; Alemania
Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina
Fil: Kuhnert, Henning. Universitat Bremen; Alemania
Fil: Mulitza, Stefan. Universitat Bremen; Alemania
Materia
Planktonic Foraminifera
Stable Carbon Isotopes
Heinrich Stadials
Southern Ocean
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/72736
Acceder
id CONICETDig_b7505d61164951de0c948feadf674da4
oai_identifier_str oai:ri.conicet.gov.ar:11336/72736
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2Campos, Marília C.Mazur Chiessi, CristianoVoigt, InesPiola, Alberto RicardoKuhnert, HenningMulitza, StefanPlanktonic ForaminiferaStable Carbon IsotopesHeinrich StadialsSouthern Oceanhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Abrupt millennial-scale climate change events of the last deglaciation (i.e. Heinrich Stadial 1 and the Younger Dryas) were accompanied by marked increases in atmospheric CO2 (CO2atm) and decreases in its stable carbon isotopic ratios (δ13C), i.e. δ13CO2atm, presumably due to outgassing from the ocean. However, information on the preceding Heinrich Stadials during the last glacial period is scarce. Here we present δ13C records from two species of planktonic foraminifera from the western South Atlantic that reveal major decreases (up to 1%) during Heinrich Stadials 3 and 2. These δ13C decreases are most likely related to millennial-scale periods of weakening of the Atlantic meridional overturning circulation and the consequent increase (decrease) in CO2atm (δ13CO2atm). We hypothesise two mechanisms that could account for the decreases observed in our records, namely strengthening of Southern Ocean deep-water ventilation and weakening of the biological pump. Additionally, we suggest that air-sea gas exchange could have contributed to the observed δ13C decreases. Together with other lines of evidence, our data are consistent with the hypothesis that the CO2 added to the atmosphere during abrupt millennial-scale climate change events of the last glacial period also originated in the ocean and reached the atmosphere by outgassing. The temporal evolution of δ13C during Heinrich Stadials 3 and 2 in our records is characterized by two relative minima separated by a relative maximum. This "w structure" is also found in North Atlantic and South American records, further suggesting that such a structure is a pervasive feature of Heinrich Stadial 2 and, possibly, also Heinrich Stadial 3.Fil: Campos, Marília C.. Universidade do Sao Paulo. Facultad de Filosofía, Letras e Ciencias Humanas; BrasilFil: Mazur Chiessi, Cristiano. Universidade do Sao Paulo. Facultad de Filosofía, Letras e Ciencias Humanas; BrasilFil: Voigt, Ines. Universitat Bremen; AlemaniaFil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; ArgentinaFil: Kuhnert, Henning. Universitat Bremen; AlemaniaFil: Mulitza, Stefan. Universitat Bremen; AlemaniaCopernicus Publications2017-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/72736Campos, Marília C.; Mazur Chiessi, Cristiano; Voigt, Ines; Piola, Alberto Ricardo; Kuhnert, Henning; et al.; δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2; Copernicus Publications; Climate Of The Past; 13; 4; 4-2017; 345-3581814-93241814-9332CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.clim-past.net/13/345/2017/info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-13-345-2017info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:54:23Zoai:ri.conicet.gov.ar:11336/72736instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:54:23.771CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2
title δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2
spellingShingle δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2
Campos, Marília C.
Planktonic Foraminifera
Stable Carbon Isotopes
Heinrich Stadials
Southern Ocean
title_short δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2
title_full δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2
title_fullStr δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2
title_full_unstemmed δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2
title_sort δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2
dc.creator.none.fl_str_mv Campos, Marília C.
Mazur Chiessi, Cristiano
Voigt, Ines
Piola, Alberto Ricardo
Kuhnert, Henning
Mulitza, Stefan
author Campos, Marília C.
author_facet Campos, Marília C.
Mazur Chiessi, Cristiano
Voigt, Ines
Piola, Alberto Ricardo
Kuhnert, Henning
Mulitza, Stefan
author_role author
author2 Mazur Chiessi, Cristiano
Voigt, Ines
Piola, Alberto Ricardo
Kuhnert, Henning
Mulitza, Stefan
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Planktonic Foraminifera
Stable Carbon Isotopes
Heinrich Stadials
Southern Ocean
topic Planktonic Foraminifera
Stable Carbon Isotopes
Heinrich Stadials
Southern Ocean
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Abrupt millennial-scale climate change events of the last deglaciation (i.e. Heinrich Stadial 1 and the Younger Dryas) were accompanied by marked increases in atmospheric CO2 (CO2atm) and decreases in its stable carbon isotopic ratios (δ13C), i.e. δ13CO2atm, presumably due to outgassing from the ocean. However, information on the preceding Heinrich Stadials during the last glacial period is scarce. Here we present δ13C records from two species of planktonic foraminifera from the western South Atlantic that reveal major decreases (up to 1%) during Heinrich Stadials 3 and 2. These δ13C decreases are most likely related to millennial-scale periods of weakening of the Atlantic meridional overturning circulation and the consequent increase (decrease) in CO2atm (δ13CO2atm). We hypothesise two mechanisms that could account for the decreases observed in our records, namely strengthening of Southern Ocean deep-water ventilation and weakening of the biological pump. Additionally, we suggest that air-sea gas exchange could have contributed to the observed δ13C decreases. Together with other lines of evidence, our data are consistent with the hypothesis that the CO2 added to the atmosphere during abrupt millennial-scale climate change events of the last glacial period also originated in the ocean and reached the atmosphere by outgassing. The temporal evolution of δ13C during Heinrich Stadials 3 and 2 in our records is characterized by two relative minima separated by a relative maximum. This "w structure" is also found in North Atlantic and South American records, further suggesting that such a structure is a pervasive feature of Heinrich Stadial 2 and, possibly, also Heinrich Stadial 3.
Fil: Campos, Marília C.. Universidade do Sao Paulo. Facultad de Filosofía, Letras e Ciencias Humanas; Brasil
Fil: Mazur Chiessi, Cristiano. Universidade do Sao Paulo. Facultad de Filosofía, Letras e Ciencias Humanas; Brasil
Fil: Voigt, Ines. Universitat Bremen; Alemania
Fil: Piola, Alberto Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina
Fil: Kuhnert, Henning. Universitat Bremen; Alemania
Fil: Mulitza, Stefan. Universitat Bremen; Alemania
description Abrupt millennial-scale climate change events of the last deglaciation (i.e. Heinrich Stadial 1 and the Younger Dryas) were accompanied by marked increases in atmospheric CO2 (CO2atm) and decreases in its stable carbon isotopic ratios (δ13C), i.e. δ13CO2atm, presumably due to outgassing from the ocean. However, information on the preceding Heinrich Stadials during the last glacial period is scarce. Here we present δ13C records from two species of planktonic foraminifera from the western South Atlantic that reveal major decreases (up to 1%) during Heinrich Stadials 3 and 2. These δ13C decreases are most likely related to millennial-scale periods of weakening of the Atlantic meridional overturning circulation and the consequent increase (decrease) in CO2atm (δ13CO2atm). We hypothesise two mechanisms that could account for the decreases observed in our records, namely strengthening of Southern Ocean deep-water ventilation and weakening of the biological pump. Additionally, we suggest that air-sea gas exchange could have contributed to the observed δ13C decreases. Together with other lines of evidence, our data are consistent with the hypothesis that the CO2 added to the atmosphere during abrupt millennial-scale climate change events of the last glacial period also originated in the ocean and reached the atmosphere by outgassing. The temporal evolution of δ13C during Heinrich Stadials 3 and 2 in our records is characterized by two relative minima separated by a relative maximum. This "w structure" is also found in North Atlantic and South American records, further suggesting that such a structure is a pervasive feature of Heinrich Stadial 2 and, possibly, also Heinrich Stadial 3.
publishDate 2017
dc.date.none.fl_str_mv 2017-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/72736
Campos, Marília C.; Mazur Chiessi, Cristiano; Voigt, Ines; Piola, Alberto Ricardo; Kuhnert, Henning; et al.; δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2; Copernicus Publications; Climate Of The Past; 13; 4; 4-2017; 345-358
1814-9324
1814-9332
CONICET Digital
CONICET
url http://hdl.handle.net/11336/72736
identifier_str_mv Campos, Marília C.; Mazur Chiessi, Cristiano; Voigt, Ines; Piola, Alberto Ricardo; Kuhnert, Henning; et al.; δ13C decreases in the upper western South Atlantic during Heinrich Stadials 3 and 2; Copernicus Publications; Climate Of The Past; 13; 4; 4-2017; 345-358
1814-9324
1814-9332
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.clim-past.net/13/345/2017/
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-13-345-2017
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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