Lithium isotopes in foraminifera shells as a novel proxy for the ocean dissolved inorganic carbon (DIC)
International audience Past ocean pH and pCO2 are critical parameters for establishing relationships between Earth's climate and the carbon cycle. Previous pCO2 estimates are associated with large uncertainties and are debated. In this study, laboratory cultures of the foraminiferan genus Amphi...
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Online Access: | https://hal.univ-lorraine.fr/hal-01770189 https://doi.org/10.1016/j.crte.2014.12.001 |
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ftccsdartic:oai:HAL:hal-01770189v1 2023-05-15T18:00:54+02:00 Lithium isotopes in foraminifera shells as a novel proxy for the ocean dissolved inorganic carbon (DIC) Vigier, Nathalie Rollion-Bard, Claire Levenson, Yaël Erez, Jonathan Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Institute of Earth Science, Hebrew University, Jerusalem The Hebrew University of Jerusalem (HUJ)-The Hebrew University of Jerusalem (HUJ) 2015-01 https://hal.univ-lorraine.fr/hal-01770189 https://doi.org/10.1016/j.crte.2014.12.001 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.crte.2014.12.001 hal-01770189 https://hal.univ-lorraine.fr/hal-01770189 doi:10.1016/j.crte.2014.12.001 Comptes Rendus Géoscience https://hal.univ-lorraine.fr/hal-01770189 Comptes Rendus Géoscience, Elsevier, 2015, 347 (1), pp.43 - 51. ⟨10.1016/j.crte.2014.12.001⟩ Lithium isotope fractionation Foraminifera DIC proxy δ7Li pH Temperature Calcite [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.1016/j.crte.2014.12.001 2021-12-26T00:01:43Z International audience Past ocean pH and pCO2 are critical parameters for establishing relationships between Earth's climate and the carbon cycle. Previous pCO2 estimates are associated with large uncertainties and are debated. In this study, laboratory cultures of the foraminiferan genus Amphistegina were performed in order to examine the possible factors that control the Li isotope composition (δ7Li) of their shells. δ7Li is insensitive to temperature and pH variations but correlates positively with the Dissolved Inorganic Carbon (DIC) of seawater. Li/Ca ratio in the shells shows negative correlation with δ7Li, consistent with published data for planktonic foraminifera from core tops and from short periods during the Cenozoic. We propose that the sensitivity of δ7Li and Li/Ca ratio to DIC is a biological phenomenon and is related to biomineralization mechanisms in foraminifera. We used the published foraminiferal δ7Li records, and our experimental results, to determine the paleo-ocean DIC and pH for the last glacial–interglacial cycle. The results are consistent with published estimates of pH and pCO2 based on boron isotopes and ice cores. We suggest Li and its isotopes may serve as a new complementary proxy for the paleo-ocean carbonate chemistry. Article in Journal/Newspaper Planktonic foraminifera Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Comptes Rendus Geoscience 347 1 43 51 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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ftccsdartic |
language |
English |
topic |
Lithium isotope fractionation Foraminifera DIC proxy δ7Li pH Temperature Calcite [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Lithium isotope fractionation Foraminifera DIC proxy δ7Li pH Temperature Calcite [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Vigier, Nathalie Rollion-Bard, Claire Levenson, Yaël Erez, Jonathan Lithium isotopes in foraminifera shells as a novel proxy for the ocean dissolved inorganic carbon (DIC) |
topic_facet |
Lithium isotope fractionation Foraminifera DIC proxy δ7Li pH Temperature Calcite [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Past ocean pH and pCO2 are critical parameters for establishing relationships between Earth's climate and the carbon cycle. Previous pCO2 estimates are associated with large uncertainties and are debated. In this study, laboratory cultures of the foraminiferan genus Amphistegina were performed in order to examine the possible factors that control the Li isotope composition (δ7Li) of their shells. δ7Li is insensitive to temperature and pH variations but correlates positively with the Dissolved Inorganic Carbon (DIC) of seawater. Li/Ca ratio in the shells shows negative correlation with δ7Li, consistent with published data for planktonic foraminifera from core tops and from short periods during the Cenozoic. We propose that the sensitivity of δ7Li and Li/Ca ratio to DIC is a biological phenomenon and is related to biomineralization mechanisms in foraminifera. We used the published foraminiferal δ7Li records, and our experimental results, to determine the paleo-ocean DIC and pH for the last glacial–interglacial cycle. The results are consistent with published estimates of pH and pCO2 based on boron isotopes and ice cores. We suggest Li and its isotopes may serve as a new complementary proxy for the paleo-ocean carbonate chemistry. |
author2 |
Centre de Recherches Pétrographiques et Géochimiques (CRPG) Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) Laboratoire d'océanographie de Villefranche (LOV) Observatoire océanologique de Villefranche-sur-mer (OOVM) Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS) Institute of Earth Science, Hebrew University, Jerusalem The Hebrew University of Jerusalem (HUJ)-The Hebrew University of Jerusalem (HUJ) |
format |
Article in Journal/Newspaper |
author |
Vigier, Nathalie Rollion-Bard, Claire Levenson, Yaël Erez, Jonathan |
author_facet |
Vigier, Nathalie Rollion-Bard, Claire Levenson, Yaël Erez, Jonathan |
author_sort |
Vigier, Nathalie |
title |
Lithium isotopes in foraminifera shells as a novel proxy for the ocean dissolved inorganic carbon (DIC) |
title_short |
Lithium isotopes in foraminifera shells as a novel proxy for the ocean dissolved inorganic carbon (DIC) |
title_full |
Lithium isotopes in foraminifera shells as a novel proxy for the ocean dissolved inorganic carbon (DIC) |
title_fullStr |
Lithium isotopes in foraminifera shells as a novel proxy for the ocean dissolved inorganic carbon (DIC) |
title_full_unstemmed |
Lithium isotopes in foraminifera shells as a novel proxy for the ocean dissolved inorganic carbon (DIC) |
title_sort |
lithium isotopes in foraminifera shells as a novel proxy for the ocean dissolved inorganic carbon (dic) |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.univ-lorraine.fr/hal-01770189 https://doi.org/10.1016/j.crte.2014.12.001 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Comptes Rendus Géoscience https://hal.univ-lorraine.fr/hal-01770189 Comptes Rendus Géoscience, Elsevier, 2015, 347 (1), pp.43 - 51. ⟨10.1016/j.crte.2014.12.001⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.crte.2014.12.001 hal-01770189 https://hal.univ-lorraine.fr/hal-01770189 doi:10.1016/j.crte.2014.12.001 |
op_doi |
https://doi.org/10.1016/j.crte.2014.12.001 |
container_title |
Comptes Rendus Geoscience |
container_volume |
347 |
container_issue |
1 |
container_start_page |
43 |
op_container_end_page |
51 |
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1766170174080155648 |