Enhanced ocean-atmosphere carbon partitioning via the carbonate counter pump during the last deglacial
International audience Several synergistic mechanisms were likely involved in the last deglacial atmospheric pCO$_2$ rise. Leading hypotheses invoke a release of deep-ocean carbon through enhanced convection in the Southern Ocean (SO) and concomitant decreased efficiency of the global soft-tissue pu...
Published in: | Nature Communications |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2018
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Subjects: | |
Online Access: | https://hal.science/hal-01819587 https://hal.science/hal-01819587/document https://hal.science/hal-01819587/file/2018_Duchamp-Alphonse_Nature%20Communications_1.pdf https://doi.org/10.1038/s41467-018-04625-7 |
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ftuniparissaclay:oai:HAL:hal-01819587v1 |
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openpolar |
institution |
Open Polar |
collection |
Archives ouvertes de Paris-Saclay |
op_collection_id |
ftuniparissaclay |
language |
English |
topic |
NATURAL IRON FERTILIZATION DEEP SOUTHERN-OCEAN ICE-AGE COCCOLITHOPHORE CALCIFICATION CO2 CONCENTRATION EXPORT PRODUCTION ORGANIC-MATTER PHYTOPLANKTON PRESERVATION VENTILATION [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
NATURAL IRON FERTILIZATION DEEP SOUTHERN-OCEAN ICE-AGE COCCOLITHOPHORE CALCIFICATION CO2 CONCENTRATION EXPORT PRODUCTION ORGANIC-MATTER PHYTOPLANKTON PRESERVATION VENTILATION [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Duchamp-Alphonse, Stéphanie Siani, Giuseppe Michel, Elisabeth Beaufort, Luc, L Gally, Yves Jaccard, Samuel Enhanced ocean-atmosphere carbon partitioning via the carbonate counter pump during the last deglacial |
topic_facet |
NATURAL IRON FERTILIZATION DEEP SOUTHERN-OCEAN ICE-AGE COCCOLITHOPHORE CALCIFICATION CO2 CONCENTRATION EXPORT PRODUCTION ORGANIC-MATTER PHYTOPLANKTON PRESERVATION VENTILATION [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Several synergistic mechanisms were likely involved in the last deglacial atmospheric pCO$_2$ rise. Leading hypotheses invoke a release of deep-ocean carbon through enhanced convection in the Southern Ocean (SO) and concomitant decreased efficiency of the global soft-tissue pump (STP). However, the temporal evolution of both the STP and the carbonate counter pump (CCP) remains unclear, thus preventing the evaluation of their contributions to the pCO$_2$ rise. Here we present sedimentary coccolith records combined with export production reconstructions from the Subantarctic Pacific to document the leverage the SO biological carbon pump (BCP) has imposed on deglacial pCO$_2$. Our data suggest a weakening of BCP during the phases of carbon outgassing, due in part to an increased CCP along with higher surface ocean fertility and elevated [CO$_{2aq}$]. We propose that reduced BCP efficiency combined with enhanced SO ventilation played a major role in propelling the Earth out of the last ice age. |
author2 |
Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) 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) Paléocéanographie (PALEOCEAN) 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)) Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Geological Sciences Bern Universität Bern = University of Bern = Université de Berne (UNIBE) Oeschger Centre for Climate Change Research (OCCR) French INSU/LEFE - CHICO project; Swedish Research Council VR-349-2012-6278 Swiss National Science Foundation PP00P2-144811, PP00P2_172915 |
format |
Article in Journal/Newspaper |
author |
Duchamp-Alphonse, Stéphanie Siani, Giuseppe Michel, Elisabeth Beaufort, Luc, L Gally, Yves Jaccard, Samuel |
author_facet |
Duchamp-Alphonse, Stéphanie Siani, Giuseppe Michel, Elisabeth Beaufort, Luc, L Gally, Yves Jaccard, Samuel |
author_sort |
Duchamp-Alphonse, Stéphanie |
title |
Enhanced ocean-atmosphere carbon partitioning via the carbonate counter pump during the last deglacial |
title_short |
Enhanced ocean-atmosphere carbon partitioning via the carbonate counter pump during the last deglacial |
title_full |
Enhanced ocean-atmosphere carbon partitioning via the carbonate counter pump during the last deglacial |
title_fullStr |
Enhanced ocean-atmosphere carbon partitioning via the carbonate counter pump during the last deglacial |
title_full_unstemmed |
Enhanced ocean-atmosphere carbon partitioning via the carbonate counter pump during the last deglacial |
title_sort |
enhanced ocean-atmosphere carbon partitioning via the carbonate counter pump during the last deglacial |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.science/hal-01819587 https://hal.science/hal-01819587/document https://hal.science/hal-01819587/file/2018_Duchamp-Alphonse_Nature%20Communications_1.pdf https://doi.org/10.1038/s41467-018-04625-7 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.science/hal-01819587 Nature Communications, 2018, 9, pp.2396. ⟨10.1038/s41467-018-04625-7⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-018-04625-7 info:eu-repo/semantics/altIdentifier/pmid/29921874 hal-01819587 https://hal.science/hal-01819587 https://hal.science/hal-01819587/document https://hal.science/hal-01819587/file/2018_Duchamp-Alphonse_Nature%20Communications_1.pdf doi:10.1038/s41467-018-04625-7 PRODINRA: 450184 PUBMED: 29921874 WOS: 000435538500014 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1038/s41467-018-04625-7 |
container_title |
Nature Communications |
container_volume |
9 |
container_issue |
1 |
_version_ |
1812181561449119744 |
spelling |
ftuniparissaclay:oai:HAL:hal-01819587v1 2024-10-06T13:52:57+00:00 Enhanced ocean-atmosphere carbon partitioning via the carbonate counter pump during the last deglacial Duchamp-Alphonse, Stéphanie Siani, Giuseppe Michel, Elisabeth Beaufort, Luc, L Gally, Yves Jaccard, Samuel Géosciences Paris Sud (GEOPS) Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS) 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) Paléocéanographie (PALEOCEAN) 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)) Centre Européen de Recherche et d'Enseignement des Géosciences de l'Environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) Institute of Geological Sciences Bern Universität Bern = University of Bern = Université de Berne (UNIBE) Oeschger Centre for Climate Change Research (OCCR) French INSU/LEFE - CHICO project; Swedish Research Council VR-349-2012-6278 Swiss National Science Foundation PP00P2-144811, PP00P2_172915 2018-12 https://hal.science/hal-01819587 https://hal.science/hal-01819587/document https://hal.science/hal-01819587/file/2018_Duchamp-Alphonse_Nature%20Communications_1.pdf https://doi.org/10.1038/s41467-018-04625-7 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-018-04625-7 info:eu-repo/semantics/altIdentifier/pmid/29921874 hal-01819587 https://hal.science/hal-01819587 https://hal.science/hal-01819587/document https://hal.science/hal-01819587/file/2018_Duchamp-Alphonse_Nature%20Communications_1.pdf doi:10.1038/s41467-018-04625-7 PRODINRA: 450184 PUBMED: 29921874 WOS: 000435538500014 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2041-1723 EISSN: 2041-1723 Nature Communications https://hal.science/hal-01819587 Nature Communications, 2018, 9, pp.2396. ⟨10.1038/s41467-018-04625-7⟩ NATURAL IRON FERTILIZATION DEEP SOUTHERN-OCEAN ICE-AGE COCCOLITHOPHORE CALCIFICATION CO2 CONCENTRATION EXPORT PRODUCTION ORGANIC-MATTER PHYTOPLANKTON PRESERVATION VENTILATION [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2018 ftuniparissaclay https://doi.org/10.1038/s41467-018-04625-7 2024-09-06T00:30:31Z International audience Several synergistic mechanisms were likely involved in the last deglacial atmospheric pCO$_2$ rise. Leading hypotheses invoke a release of deep-ocean carbon through enhanced convection in the Southern Ocean (SO) and concomitant decreased efficiency of the global soft-tissue pump (STP). However, the temporal evolution of both the STP and the carbonate counter pump (CCP) remains unclear, thus preventing the evaluation of their contributions to the pCO$_2$ rise. Here we present sedimentary coccolith records combined with export production reconstructions from the Subantarctic Pacific to document the leverage the SO biological carbon pump (BCP) has imposed on deglacial pCO$_2$. Our data suggest a weakening of BCP during the phases of carbon outgassing, due in part to an increased CCP along with higher surface ocean fertility and elevated [CO$_{2aq}$]. We propose that reduced BCP efficiency combined with enhanced SO ventilation played a major role in propelling the Earth out of the last ice age. Article in Journal/Newspaper Southern Ocean Archives ouvertes de Paris-Saclay Pacific Southern Ocean Nature Communications 9 1 |