Changes in atmospheric CO2 and its carbon isotopic ratio during the penultimate deglaciation
International audience The largest natural increases in atmospheric CO2 concentration as recorded in ice cores occur when the Earth climate abruptly shifts from a glacial to an interglacial state. Open questions remain regarding the processes at play, the sequences of events and their similarities a...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , |
Other Authors: | , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2010
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Online Access: | https://hal-insu.archives-ouvertes.fr/insu-00653385 https://doi.org/10.1016/j.quascirev.2010.05.002 |
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English |
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[SDU]Sciences of the Universe [physics] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
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[SDU]Sciences of the Universe [physics] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Lourantou, A. Chappellaz, J. Barnola, J.M. Masson-Delmotte, Valérie Raynaud, D. Changes in atmospheric CO2 and its carbon isotopic ratio during the penultimate deglaciation |
topic_facet |
[SDU]Sciences of the Universe [physics] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The largest natural increases in atmospheric CO2 concentration as recorded in ice cores occur when the Earth climate abruptly shifts from a glacial to an interglacial state. Open questions remain regarding the processes at play, the sequences of events and their similarities along different glacial-interglacial transitions. Here we provide new combined data of atmospheric CO2 and its carbon isotopic ratio (δ13CO2) for the penultimate glacial-interglacial transition (Termination II) from the Antarctic EPICA Dome C ice core. Together with the strongest Antarctic warming, this transition bears the largest CO2 increase (104 ppmv) of the last nine Terminations, ending with an overshoot of 21 ppmv occurring within ∼300 y and leading to higher levels than those of the late pre-industrial Holocene. The full CO2 rise is accompanied by an overall decrease of the δ13CO2 minimum values, on which three positive excursions are superimposed. Peak-to-peak δ13CO2 changes in our record can reach ∼1‰. The ice core atmospheric δ13CO2 appears more depleted by ∼0.2‰ during Termination II compared to Termination I, paralleling a similar carbon isotopic depletion recorded in marine data. During both terminations, most of CO2 and δ13CO2 variations are attributed to southern ocean stratification breakdown and decreased efficiency of the biological pump. Compared to Termination I, Termination II ice core data point to different timings of decrease in iron supply and sea-ice extent, suggesting that they could account for distinct patterns of the carbon cycle. |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) CLIPS Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) European Project: 39423,FP6-SUSTDEV,EPICA-MIS |
format |
Article in Journal/Newspaper |
author |
Lourantou, A. Chappellaz, J. Barnola, J.M. Masson-Delmotte, Valérie Raynaud, D. |
author_facet |
Lourantou, A. Chappellaz, J. Barnola, J.M. Masson-Delmotte, Valérie Raynaud, D. |
author_sort |
Lourantou, A. |
title |
Changes in atmospheric CO2 and its carbon isotopic ratio during the penultimate deglaciation |
title_short |
Changes in atmospheric CO2 and its carbon isotopic ratio during the penultimate deglaciation |
title_full |
Changes in atmospheric CO2 and its carbon isotopic ratio during the penultimate deglaciation |
title_fullStr |
Changes in atmospheric CO2 and its carbon isotopic ratio during the penultimate deglaciation |
title_full_unstemmed |
Changes in atmospheric CO2 and its carbon isotopic ratio during the penultimate deglaciation |
title_sort |
changes in atmospheric co2 and its carbon isotopic ratio during the penultimate deglaciation |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal-insu.archives-ouvertes.fr/insu-00653385 https://doi.org/10.1016/j.quascirev.2010.05.002 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic EPICA ice core Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic EPICA ice core Sea ice Southern Ocean |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://hal-insu.archives-ouvertes.fr/insu-00653385 Quaternary Science Reviews, Elsevier, 2010, 29 (17-18), pp.1983-1992. ⟨10.1016/j.quascirev.2010.05.002⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2010.05.002 info:eu-repo/grantAgreement//39423/EU/New Paleoreconstructions from Antarctic Ice and Marine Records/EPICA-MIS insu-00653385 https://hal-insu.archives-ouvertes.fr/insu-00653385 doi:10.1016/j.quascirev.2010.05.002 |
op_doi |
https://doi.org/10.1016/j.quascirev.2010.05.002 |
container_title |
Quaternary Science Reviews |
container_volume |
29 |
container_issue |
17-18 |
container_start_page |
1983 |
op_container_end_page |
1992 |
_version_ |
1766253115264204800 |
spelling |
ftccsdartic:oai:HAL:insu-00653385v1 2023-05-15T13:50:09+02:00 Changes in atmospheric CO2 and its carbon isotopic ratio during the penultimate deglaciation Lourantou, A. Chappellaz, J. Barnola, J.M. Masson-Delmotte, Valérie Raynaud, D. Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) CLIPS Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Grenoble (OSUG) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) Glaces et Continents, Climats et Isotopes Stables (GLACCIOS) Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ) European Project: 39423,FP6-SUSTDEV,EPICA-MIS 2010-08 https://hal-insu.archives-ouvertes.fr/insu-00653385 https://doi.org/10.1016/j.quascirev.2010.05.002 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2010.05.002 info:eu-repo/grantAgreement//39423/EU/New Paleoreconstructions from Antarctic Ice and Marine Records/EPICA-MIS insu-00653385 https://hal-insu.archives-ouvertes.fr/insu-00653385 doi:10.1016/j.quascirev.2010.05.002 ISSN: 0277-3791 Quaternary Science Reviews https://hal-insu.archives-ouvertes.fr/insu-00653385 Quaternary Science Reviews, Elsevier, 2010, 29 (17-18), pp.1983-1992. ⟨10.1016/j.quascirev.2010.05.002⟩ [SDU]Sciences of the Universe [physics] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2010 ftccsdartic https://doi.org/10.1016/j.quascirev.2010.05.002 2021-12-19T03:31:32Z International audience The largest natural increases in atmospheric CO2 concentration as recorded in ice cores occur when the Earth climate abruptly shifts from a glacial to an interglacial state. Open questions remain regarding the processes at play, the sequences of events and their similarities along different glacial-interglacial transitions. Here we provide new combined data of atmospheric CO2 and its carbon isotopic ratio (δ13CO2) for the penultimate glacial-interglacial transition (Termination II) from the Antarctic EPICA Dome C ice core. Together with the strongest Antarctic warming, this transition bears the largest CO2 increase (104 ppmv) of the last nine Terminations, ending with an overshoot of 21 ppmv occurring within ∼300 y and leading to higher levels than those of the late pre-industrial Holocene. The full CO2 rise is accompanied by an overall decrease of the δ13CO2 minimum values, on which three positive excursions are superimposed. Peak-to-peak δ13CO2 changes in our record can reach ∼1‰. The ice core atmospheric δ13CO2 appears more depleted by ∼0.2‰ during Termination II compared to Termination I, paralleling a similar carbon isotopic depletion recorded in marine data. During both terminations, most of CO2 and δ13CO2 variations are attributed to southern ocean stratification breakdown and decreased efficiency of the biological pump. Compared to Termination I, Termination II ice core data point to different timings of decrease in iron supply and sea-ice extent, suggesting that they could account for distinct patterns of the carbon cycle. Article in Journal/Newspaper Antarc* Antarctic EPICA ice core Sea ice Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Southern Ocean The Antarctic Quaternary Science Reviews 29 17-18 1983 1992 |