Mg/Ca, Sr/Ca and stable isotopes from the planktonic foraminifera T. sacculifer : testing a multi-proxy approach for inferring paleotemperature and paleosalinity
International audience Over the last decades, sea surface temperature (SST) reconstructions based on the Mg/Ca of foraminiferal calcite have frequently been used in combination with the δ 18 O signal from the same material to provide estimates of the δ 18 O of water (δ 18 O w ), a proxy for global i...
Published in: | Biogeosciences |
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Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2021
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Subjects: | |
Online Access: | https://hal.science/hal-03157790 https://hal.science/hal-03157790/document https://hal.science/hal-03157790/file/bg-18-423-2021.pdf https://doi.org/10.5194/bg-18-423-2021 |
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ftunivnantes:oai:HAL:hal-03157790v1 |
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Université de Nantes: HAL-UNIV-NANTES |
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ftunivnantes |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology Dissard, Delphine Reichart, Gert Jan Menkès, Christophe E. Mangeas, Morgan Frickenhaus, Stephan Bijma, Jelle Mg/Ca, Sr/Ca and stable isotopes from the planktonic foraminifera T. sacculifer : testing a multi-proxy approach for inferring paleotemperature and paleosalinity |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology |
description |
International audience Over the last decades, sea surface temperature (SST) reconstructions based on the Mg/Ca of foraminiferal calcite have frequently been used in combination with the δ 18 O signal from the same material to provide estimates of the δ 18 O of water (δ 18 O w ), a proxy for global ice volume and sea surface salinity (SSS). However, because of error propagation from one step to the next, better calibrations are required to increase the accuracy and robustness of existing isotope and element to temperature proxy relationships. Towards that goal, we determined Mg/Ca, Sr/Ca and the oxygen isotopic composition of Trilobatus sacculifer (previously referenced as Globigerinoides sacculifer) collected from surface waters (0–10 m) along a north–south transect in the eastern basin of the tropical and subtropical Atlantic Ocean. We established a new paleotemperature calibration based on Mg/Ca and on the combination of Mg/Ca and Sr/Ca. Subsequently, a sensitivity analysis was performed in which one, two or three different equations were considered. Results indicate that foraminiferal Mg/Ca allows for an accurate reconstruction of surface water temperature. Combining equations, δ 18 O w can be reconstructed with a precision of about ± 0.5 ‰. However, the best possible salinity reconstruction based on locally calibrated equations only allowed for a reconstruction with an uncertainty of ± 2.49. This was confirmed by a Monte Carlo simulation, applied to test successive reconstructions in an “ideal case” in which explanatory variables are known. This simulation shows that from a purely statistical point of view, successive reconstructions involving Mg/Ca and δ 18 O c preclude salinity reconstructions with a precision better than ± 1.69 and hardly better than ± 2.65 due to error propagation. Nevertheless, a direct linear fit to reconstruct salinity based on the same measured variables (Mg/Ca and δ 18 O c ) was established. This direct reconstruction of salinity led to a much better estimation of salinity (± ... |
author2 |
Variabilité à long terme du climat de l'océan (VALCO) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Royal Netherlands Institute for Sea Research (NIOZ) Department of Earth Sciences Utrecht Utrecht University Utrecht Ecologie marine tropicale des océans Pacifique et Indien (ENTROPIE Nouvelle-Calédonie ) Institut de Recherche pour le Développement (IRD Nouvelle-Calédonie )-Ifremer - Nouvelle-Calédonie Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de la Nouvelle-Calédonie (UNC) |
format |
Article in Journal/Newspaper |
author |
Dissard, Delphine Reichart, Gert Jan Menkès, Christophe E. Mangeas, Morgan Frickenhaus, Stephan Bijma, Jelle |
author_facet |
Dissard, Delphine Reichart, Gert Jan Menkès, Christophe E. Mangeas, Morgan Frickenhaus, Stephan Bijma, Jelle |
author_sort |
Dissard, Delphine |
title |
Mg/Ca, Sr/Ca and stable isotopes from the planktonic foraminifera T. sacculifer : testing a multi-proxy approach for inferring paleotemperature and paleosalinity |
title_short |
Mg/Ca, Sr/Ca and stable isotopes from the planktonic foraminifera T. sacculifer : testing a multi-proxy approach for inferring paleotemperature and paleosalinity |
title_full |
Mg/Ca, Sr/Ca and stable isotopes from the planktonic foraminifera T. sacculifer : testing a multi-proxy approach for inferring paleotemperature and paleosalinity |
title_fullStr |
Mg/Ca, Sr/Ca and stable isotopes from the planktonic foraminifera T. sacculifer : testing a multi-proxy approach for inferring paleotemperature and paleosalinity |
title_full_unstemmed |
Mg/Ca, Sr/Ca and stable isotopes from the planktonic foraminifera T. sacculifer : testing a multi-proxy approach for inferring paleotemperature and paleosalinity |
title_sort |
mg/ca, sr/ca and stable isotopes from the planktonic foraminifera t. sacculifer : testing a multi-proxy approach for inferring paleotemperature and paleosalinity |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03157790 https://hal.science/hal-03157790/document https://hal.science/hal-03157790/file/bg-18-423-2021.pdf https://doi.org/10.5194/bg-18-423-2021 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-03157790 Biogeosciences, 2021, 18 (2), pp.423-439. ⟨10.5194/bg-18-423-2021⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-18-423-2021 hal-03157790 https://hal.science/hal-03157790 https://hal.science/hal-03157790/document https://hal.science/hal-03157790/file/bg-18-423-2021.pdf doi:10.5194/bg-18-423-2021 IRD: fdi:010080932 WOS: 000611534700002 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/bg-18-423-2021 |
container_title |
Biogeosciences |
container_volume |
18 |
container_issue |
2 |
container_start_page |
423 |
op_container_end_page |
439 |
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1766170559017648128 |
spelling |
ftunivnantes:oai:HAL:hal-03157790v1 2023-05-15T18:01:11+02:00 Mg/Ca, Sr/Ca and stable isotopes from the planktonic foraminifera T. sacculifer : testing a multi-proxy approach for inferring paleotemperature and paleosalinity Dissard, Delphine Reichart, Gert Jan Menkès, Christophe E. Mangeas, Morgan Frickenhaus, Stephan Bijma, Jelle Variabilité à long terme du climat de l'océan (VALCO) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) Royal Netherlands Institute for Sea Research (NIOZ) Department of Earth Sciences Utrecht Utrecht University Utrecht Ecologie marine tropicale des océans Pacifique et Indien (ENTROPIE Nouvelle-Calédonie ) Institut de Recherche pour le Développement (IRD Nouvelle-Calédonie )-Ifremer - Nouvelle-Calédonie Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de la Nouvelle-Calédonie (UNC) 2021 https://hal.science/hal-03157790 https://hal.science/hal-03157790/document https://hal.science/hal-03157790/file/bg-18-423-2021.pdf https://doi.org/10.5194/bg-18-423-2021 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/bg-18-423-2021 hal-03157790 https://hal.science/hal-03157790 https://hal.science/hal-03157790/document https://hal.science/hal-03157790/file/bg-18-423-2021.pdf doi:10.5194/bg-18-423-2021 IRD: fdi:010080932 WOS: 000611534700002 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1726-4170 EISSN: 1726-4189 Biogeosciences https://hal.science/hal-03157790 Biogeosciences, 2021, 18 (2), pp.423-439. ⟨10.5194/bg-18-423-2021⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.5194/bg-18-423-2021 2023-01-18T00:29:06Z International audience Over the last decades, sea surface temperature (SST) reconstructions based on the Mg/Ca of foraminiferal calcite have frequently been used in combination with the δ 18 O signal from the same material to provide estimates of the δ 18 O of water (δ 18 O w ), a proxy for global ice volume and sea surface salinity (SSS). However, because of error propagation from one step to the next, better calibrations are required to increase the accuracy and robustness of existing isotope and element to temperature proxy relationships. Towards that goal, we determined Mg/Ca, Sr/Ca and the oxygen isotopic composition of Trilobatus sacculifer (previously referenced as Globigerinoides sacculifer) collected from surface waters (0–10 m) along a north–south transect in the eastern basin of the tropical and subtropical Atlantic Ocean. We established a new paleotemperature calibration based on Mg/Ca and on the combination of Mg/Ca and Sr/Ca. Subsequently, a sensitivity analysis was performed in which one, two or three different equations were considered. Results indicate that foraminiferal Mg/Ca allows for an accurate reconstruction of surface water temperature. Combining equations, δ 18 O w can be reconstructed with a precision of about ± 0.5 ‰. However, the best possible salinity reconstruction based on locally calibrated equations only allowed for a reconstruction with an uncertainty of ± 2.49. This was confirmed by a Monte Carlo simulation, applied to test successive reconstructions in an “ideal case” in which explanatory variables are known. This simulation shows that from a purely statistical point of view, successive reconstructions involving Mg/Ca and δ 18 O c preclude salinity reconstructions with a precision better than ± 1.69 and hardly better than ± 2.65 due to error propagation. Nevertheless, a direct linear fit to reconstruct salinity based on the same measured variables (Mg/Ca and δ 18 O c ) was established. This direct reconstruction of salinity led to a much better estimation of salinity (± ... Article in Journal/Newspaper Planktonic foraminifera Université de Nantes: HAL-UNIV-NANTES Biogeosciences 18 2 423 439 |