Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise
International audience The link between the atmospheric CO 2 level and the ventilation state of the deep ocean is an important building block of the key hypotheses put forth to explain glacialinterglacial CO 2 fluctuations. In this study, we systematically examine the sensitivity of atmospheric CO 2...
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Online Access: | https://hal.science/hal-03113012 https://hal.science/hal-03113012/document https://hal.science/hal-03113012/file/cp-7-771-2011.pdf https://doi.org/10.5194/cp-7-771-2011 |
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ftinsu:oai:HAL:hal-03113012v1 2024-04-28T08:39:27+00:00 Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise Tschumi, T. Joos, F. Gehlen, M. Heinze, C. Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Oeschger Centre for Climate Change Research (OCCR) Universität Bern / University of Bern (UNIBE) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Geophysical Institute Bergen (GFI / BiU) University of Bergen (UiB) 2011 https://hal.science/hal-03113012 https://hal.science/hal-03113012/document https://hal.science/hal-03113012/file/cp-7-771-2011.pdf https://doi.org/10.5194/cp-7-771-2011 en eng HAL CCSD European Geosciences Union (EGU) info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-7-771-2011 hal-03113012 https://hal.science/hal-03113012 https://hal.science/hal-03113012/document https://hal.science/hal-03113012/file/cp-7-771-2011.pdf doi:10.5194/cp-7-771-2011 info:eu-repo/semantics/OpenAccess ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-03113012 Climate of the Past, 2011, 7 (3), pp.771-800. ⟨10.5194/cp-7-771-2011⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2011 ftinsu https://doi.org/10.5194/cp-7-771-2011 2024-04-05T00:38:39Z International audience The link between the atmospheric CO 2 level and the ventilation state of the deep ocean is an important building block of the key hypotheses put forth to explain glacialinterglacial CO 2 fluctuations. In this study, we systematically examine the sensitivity of atmospheric CO 2 and its carbon isotope composition to changes in deep ocean ventilation, the ocean carbon pumps, and sediment formation in a global 3-D ocean-sediment carbon cycle model. Our results provide support for the hypothesis that a break up of Southern Ocean stratification and invigorated deep ocean ventilation were the dominant drivers for the early deglacial CO 2 rise of ∼35 ppm between the Last Glacial Maximum and 14.6 ka BP. Another rise of 10 ppm until the end of the Holocene is attributed to carbonate compensation responding to the early deglacial change in ocean circulation. Our reasoning is based on a multi-proxy analysis which indicates that an acceleration of deep ocean ventilation during early deglaciation is not only consistent with recorded atmospheric CO 2 but also with the reconstructed opal sedimentation peak in the Southern Ocean at around 16 ka BP, the record of atmospheric δ 13 C CO 2 , and the reconstructed changes in the Pacific CaCO 3 saturation horizon. Article in Journal/Newspaper Southern Ocean Institut national des sciences de l'Univers: HAL-INSU Climate of the Past 7 3 771 800 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Tschumi, T. Joos, F. Gehlen, M. Heinze, C. Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience The link between the atmospheric CO 2 level and the ventilation state of the deep ocean is an important building block of the key hypotheses put forth to explain glacialinterglacial CO 2 fluctuations. In this study, we systematically examine the sensitivity of atmospheric CO 2 and its carbon isotope composition to changes in deep ocean ventilation, the ocean carbon pumps, and sediment formation in a global 3-D ocean-sediment carbon cycle model. Our results provide support for the hypothesis that a break up of Southern Ocean stratification and invigorated deep ocean ventilation were the dominant drivers for the early deglacial CO 2 rise of ∼35 ppm between the Last Glacial Maximum and 14.6 ka BP. Another rise of 10 ppm until the end of the Holocene is attributed to carbonate compensation responding to the early deglacial change in ocean circulation. Our reasoning is based on a multi-proxy analysis which indicates that an acceleration of deep ocean ventilation during early deglaciation is not only consistent with recorded atmospheric CO 2 but also with the reconstructed opal sedimentation peak in the Southern Ocean at around 16 ka BP, the record of atmospheric δ 13 C CO 2 , and the reconstructed changes in the Pacific CaCO 3 saturation horizon. |
author2 |
Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) Oeschger Centre for Climate Change Research (OCCR) Universität Bern / University of Bern (UNIBE) Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) 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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Modelling the Earth Response to Multiple Anthropogenic Interactions and Dynamics (MERMAID) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-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)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Geophysical Institute Bergen (GFI / BiU) University of Bergen (UiB) |
format |
Article in Journal/Newspaper |
author |
Tschumi, T. Joos, F. Gehlen, M. Heinze, C. |
author_facet |
Tschumi, T. Joos, F. Gehlen, M. Heinze, C. |
author_sort |
Tschumi, T. |
title |
Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise |
title_short |
Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise |
title_full |
Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise |
title_fullStr |
Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise |
title_full_unstemmed |
Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO2 rise |
title_sort |
deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial co2 rise |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://hal.science/hal-03113012 https://hal.science/hal-03113012/document https://hal.science/hal-03113012/file/cp-7-771-2011.pdf https://doi.org/10.5194/cp-7-771-2011 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 1814-9324 EISSN: 1814-9332 Climate of the Past https://hal.science/hal-03113012 Climate of the Past, 2011, 7 (3), pp.771-800. ⟨10.5194/cp-7-771-2011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/cp-7-771-2011 hal-03113012 https://hal.science/hal-03113012 https://hal.science/hal-03113012/document https://hal.science/hal-03113012/file/cp-7-771-2011.pdf doi:10.5194/cp-7-771-2011 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/cp-7-771-2011 |
container_title |
Climate of the Past |
container_volume |
7 |
container_issue |
3 |
container_start_page |
771 |
op_container_end_page |
800 |
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1797570467450585088 |