Carbon 13 Isotopes Reveal Limited Ocean Circulation Changes Between Interglacials of the Last 800 ka
International audience Ice core data have shown that atmospheric CO2 concentrations during interglacials were lower before the Mid-Brunhes Event (MBE, ~430 ka), than after the MBE by around 30 ppm. To explain such a difference, it has been hypothesized that increased bottom water formation around An...
Published in: | Paleoceanography and Paleoclimatology |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.science/hal-02844111 https://hal.science/hal-02844111/document https://hal.science/hal-02844111/file/2019PA003776.pdf https://doi.org/10.1029/2019PA003776 |
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Institut national des sciences de l'Univers: HAL-INSU |
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modeling carbon 13 interglacial iLOVECLIM [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
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modeling carbon 13 interglacial iLOVECLIM [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Bouttes, Nathaëlle Vazquez Riveiros, Natalia Govin, Aline Swingedouw, Didier Sanchez-Goni, Maria F. Crosta, Xavier Roche, Didier M. Carbon 13 Isotopes Reveal Limited Ocean Circulation Changes Between Interglacials of the Last 800 ka |
topic_facet |
modeling carbon 13 interglacial iLOVECLIM [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Ice core data have shown that atmospheric CO2 concentrations during interglacials were lower before the Mid-Brunhes Event (MBE, ~430 ka), than after the MBE by around 30 ppm. To explain such a difference, it has been hypothesized that increased bottom water formation around Antarctica or reduced Atlantic Meridional Overturning Circulation (AMOC) could have led to greater oceanic carbon storage before the MBE, resulting in less carbon in the atmosphere. However, only few data on possible changes in interglacial ocean circulation across the MBE have been compiled, hampering model-data comparison. Here we present a new global compilation of benthic foraminifera carbon isotopic (δ13C) records from 31 marine sediment cores covering the last 800 ka, with the aim of evaluating possible changes of interglacial ocean circulation across the MBE. We show that a small systematic difference between pre- and post-MBE interglacial δ13C is observed. In pre-MBE interglacials, northern source waters tend to have slightly higher δ13C values and penetrate deeper, which could be linked to an increased northern sourced water formation or a decreased southern sourced water formation. Numerical model simulations tend to support the role of abyssal water formation around Antarctica: Decreased convection there associated with increased sinking of dense water along the continental slopes results in increased δ13C values in the Atlantic in agreement with pre-MBE interglacial data. It also yields reduced atmospheric CO2 as in pre-MBE records, despite a smaller simulated amplitude change compared to data, highlighting the need for other processes to explain the MBE transition. |
author2 |
Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Modélisation du climat (CLIM) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Géosciences Marines (GM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Climat et Magnétisme (CLIMAG) École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL) The research leading to these results has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement no. 656625, project CHOCOLATE. European Project: 656625,H2020,H2020-MSCA-IF-2014,CHOCOLATE(2015) |
format |
Article in Journal/Newspaper |
author |
Bouttes, Nathaëlle Vazquez Riveiros, Natalia Govin, Aline Swingedouw, Didier Sanchez-Goni, Maria F. Crosta, Xavier Roche, Didier M. |
author_facet |
Bouttes, Nathaëlle Vazquez Riveiros, Natalia Govin, Aline Swingedouw, Didier Sanchez-Goni, Maria F. Crosta, Xavier Roche, Didier M. |
author_sort |
Bouttes, Nathaëlle |
title |
Carbon 13 Isotopes Reveal Limited Ocean Circulation Changes Between Interglacials of the Last 800 ka |
title_short |
Carbon 13 Isotopes Reveal Limited Ocean Circulation Changes Between Interglacials of the Last 800 ka |
title_full |
Carbon 13 Isotopes Reveal Limited Ocean Circulation Changes Between Interglacials of the Last 800 ka |
title_fullStr |
Carbon 13 Isotopes Reveal Limited Ocean Circulation Changes Between Interglacials of the Last 800 ka |
title_full_unstemmed |
Carbon 13 Isotopes Reveal Limited Ocean Circulation Changes Between Interglacials of the Last 800 ka |
title_sort |
carbon 13 isotopes reveal limited ocean circulation changes between interglacials of the last 800 ka |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02844111 https://hal.science/hal-02844111/document https://hal.science/hal-02844111/file/2019PA003776.pdf https://doi.org/10.1029/2019PA003776 |
genre |
Antarc* Antarctica ice core |
genre_facet |
Antarc* Antarctica ice core |
op_source |
ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal.science/hal-02844111 Paleoceanography and Paleoclimatology, 2020, 35 (5), pp.e2019PA003776. ⟨10.1029/2019PA003776⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1029/2019PA003776 info:eu-repo/grantAgreement//656625/EU/CHanges Of CO2 Levels during pAst and fuTure intErglacials/CHOCOLATE hal-02844111 https://hal.science/hal-02844111 https://hal.science/hal-02844111/document https://hal.science/hal-02844111/file/2019PA003776.pdf doi:10.1029/2019PA003776 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2019PA003776 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
35 |
container_issue |
5 |
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1769006158285111296 |
spelling |
ftinsu:oai:HAL:hal-02844111v1 2023-06-18T03:36:24+02:00 Carbon 13 Isotopes Reveal Limited Ocean Circulation Changes Between Interglacials of the Last 800 ka Bouttes, Nathaëlle Vazquez Riveiros, Natalia Govin, Aline Swingedouw, Didier Sanchez-Goni, Maria F. Crosta, Xavier Roche, Didier M. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Modélisation du climat (CLIM) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) Géosciences Marines (GM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Climat et Magnétisme (CLIMAG) École Pratique des Hautes Études (EPHE) Université Paris sciences et lettres (PSL) The research leading to these results has received funding from the European Union's Horizon 2020 research and innovation program under grant agreement no. 656625, project CHOCOLATE. European Project: 656625,H2020,H2020-MSCA-IF-2014,CHOCOLATE(2015) 2020-05-10 https://hal.science/hal-02844111 https://hal.science/hal-02844111/document https://hal.science/hal-02844111/file/2019PA003776.pdf https://doi.org/10.1029/2019PA003776 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2019PA003776 info:eu-repo/grantAgreement//656625/EU/CHanges Of CO2 Levels during pAst and fuTure intErglacials/CHOCOLATE hal-02844111 https://hal.science/hal-02844111 https://hal.science/hal-02844111/document https://hal.science/hal-02844111/file/2019PA003776.pdf doi:10.1029/2019PA003776 info:eu-repo/semantics/OpenAccess ISSN: 2572-4525 EISSN: 1944-9186 Paleoceanography and Paleoclimatology https://hal.science/hal-02844111 Paleoceanography and Paleoclimatology, 2020, 35 (5), pp.e2019PA003776. ⟨10.1029/2019PA003776⟩ modeling carbon 13 interglacial iLOVECLIM [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2020 ftinsu https://doi.org/10.1029/2019PA003776 2023-06-05T22:57:06Z International audience Ice core data have shown that atmospheric CO2 concentrations during interglacials were lower before the Mid-Brunhes Event (MBE, ~430 ka), than after the MBE by around 30 ppm. To explain such a difference, it has been hypothesized that increased bottom water formation around Antarctica or reduced Atlantic Meridional Overturning Circulation (AMOC) could have led to greater oceanic carbon storage before the MBE, resulting in less carbon in the atmosphere. However, only few data on possible changes in interglacial ocean circulation across the MBE have been compiled, hampering model-data comparison. Here we present a new global compilation of benthic foraminifera carbon isotopic (δ13C) records from 31 marine sediment cores covering the last 800 ka, with the aim of evaluating possible changes of interglacial ocean circulation across the MBE. We show that a small systematic difference between pre- and post-MBE interglacial δ13C is observed. In pre-MBE interglacials, northern source waters tend to have slightly higher δ13C values and penetrate deeper, which could be linked to an increased northern sourced water formation or a decreased southern sourced water formation. Numerical model simulations tend to support the role of abyssal water formation around Antarctica: Decreased convection there associated with increased sinking of dense water along the continental slopes results in increased δ13C values in the Atlantic in agreement with pre-MBE interglacial data. It also yields reduced atmospheric CO2 as in pre-MBE records, despite a smaller simulated amplitude change compared to data, highlighting the need for other processes to explain the MBE transition. Article in Journal/Newspaper Antarc* Antarctica ice core Institut national des sciences de l'Univers: HAL-INSU Paleoceanography and Paleoclimatology 35 5 |