Millennial-scale variations of the Holocene North Atlantic mid-depth gyre inferred from radiocarbon and neodymium isotopes in cold water corals
International audience Variations in North Atlantic Ocean mid-depth circulation during the Holocene are poorly understood. It is believed that they had a significant influence on the properties of water entering the Nordic Sea by redistributing heat and freshwater, potentially affecting deep-water f...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2019
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Subjects: | |
Online Access: | https://hal.science/hal-02087629 https://hal.science/hal-02087629/document https://hal.science/hal-02087629/file/1-s2.0-S0277379119301180-am.pdf https://doi.org/10.1016/j.quascirev.2019.03.011 |
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ftuniversailles:oai:HAL:hal-02087629v1 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
language |
English |
topic |
Panoply Cold-water corals Rockall Trough Holocene Nd isotopic composition radiocarbon North Atlantic gyre dynamics [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
Panoply Cold-water corals Rockall Trough Holocene Nd isotopic composition radiocarbon North Atlantic gyre dynamics [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Colin, Christophe Tisnerat-Laborde, Nadine Mienis, Furu Collart, Tim Pons-Branchu, Edwige Dubois-Dauphin, Quentin Frank, Norbert Dapoigny, Arnaud Ayache, Mohamed Swingedouw, Didier Dutay, Jean-Claude Eynaud, Frédérique Debret, Maxime Blamart, Dominique Douville, Eric Millennial-scale variations of the Holocene North Atlantic mid-depth gyre inferred from radiocarbon and neodymium isotopes in cold water corals |
topic_facet |
Panoply Cold-water corals Rockall Trough Holocene Nd isotopic composition radiocarbon North Atlantic gyre dynamics [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience Variations in North Atlantic Ocean mid-depth circulation during the Holocene are poorly understood. It is believed that they had a significant influence on the properties of water entering the Nordic Sea by redistributing heat and freshwater, potentially affecting deep-water formation and climate. To improve our knowledge of the NE Atlantic mid-depth circulation, radiocarbon and neodymium isotope analyses have been then carried out on precisely dated (U-Th) L. pertusa and M. oculata coral fragments from two sediment cores taken at ∼750 m water depth on the SW Rockall Trough margin. Cold-water coral (CWC) εNd values vary between −12.2 ± 0.3 and −16.6 ± 0.4 and result from variable contributions of unradiogenic mid-depth subpolar gyre (mid-SPG) water (∼-15) and more radiogenic Eastern North Atlantic Water (ENAW) (∼-11) which is transported northward to the Rockall Trough by boundary currents along the European margin. Increased coral εNd reflects a westward contraction of the mid-SPG water and a higher proportion of ENAW. The mid-Holocene (from 8.8 to 6.8 ka BP) is marked by unradiogenic coral εNd (from −16.6 ± 0.4 to −14.6 ± 0.5) indicating a greater eastward extension of the mid-SPG. This is followed by a shift from 6.8 to 5 ka BP toward more radiogenic εNd values (from −15.4 ± 0.3 to −13.3 ± 0.2) suggesting a westward contraction of the mid-SPG and a higher proportion of ENAW. The mid-Holocene long-term change in εNd is characterized by millennial variations of up to 2.5 epsilon units well marked during the Late Holocene, indicating that eastward extension of the mid-SPG coeval with warm periods in northern Europe (e.g. the Medieval Climatic Anomaly and the Roman Warm Period). Most of the CWC-derived Δ14C values match the global ocean values indicating that the water masses bathing the corals were generally well ventilated; the exceptions are a few short intervals of eastward extension of the mid-SPG, which are characterized by lower Δ14C during the late Holocene. We propose that these ... |
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) Géochrononologie Traceurs Archéométrie (GEOTRAC) 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)) Universiteit Utrecht / Utrecht University Utrecht Universiteit Gent = Ghent University (UGENT) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Modélisation du climat (CLIM) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Paléocéanographie (PALEOCEAN) ANR-17-EURE-0006,IPSL-CGS,IPSL Climate graduate school(2017) ANR-10-LABX-0018,L-IPSL,LabEx Institut Pierre Simon Laplace (IPSL): Understand climate and anticipate future changes(2010) |
format |
Article in Journal/Newspaper |
author |
Colin, Christophe Tisnerat-Laborde, Nadine Mienis, Furu Collart, Tim Pons-Branchu, Edwige Dubois-Dauphin, Quentin Frank, Norbert Dapoigny, Arnaud Ayache, Mohamed Swingedouw, Didier Dutay, Jean-Claude Eynaud, Frédérique Debret, Maxime Blamart, Dominique Douville, Eric |
author_facet |
Colin, Christophe Tisnerat-Laborde, Nadine Mienis, Furu Collart, Tim Pons-Branchu, Edwige Dubois-Dauphin, Quentin Frank, Norbert Dapoigny, Arnaud Ayache, Mohamed Swingedouw, Didier Dutay, Jean-Claude Eynaud, Frédérique Debret, Maxime Blamart, Dominique Douville, Eric |
author_sort |
Colin, Christophe |
title |
Millennial-scale variations of the Holocene North Atlantic mid-depth gyre inferred from radiocarbon and neodymium isotopes in cold water corals |
title_short |
Millennial-scale variations of the Holocene North Atlantic mid-depth gyre inferred from radiocarbon and neodymium isotopes in cold water corals |
title_full |
Millennial-scale variations of the Holocene North Atlantic mid-depth gyre inferred from radiocarbon and neodymium isotopes in cold water corals |
title_fullStr |
Millennial-scale variations of the Holocene North Atlantic mid-depth gyre inferred from radiocarbon and neodymium isotopes in cold water corals |
title_full_unstemmed |
Millennial-scale variations of the Holocene North Atlantic mid-depth gyre inferred from radiocarbon and neodymium isotopes in cold water corals |
title_sort |
millennial-scale variations of the holocene north atlantic mid-depth gyre inferred from radiocarbon and neodymium isotopes in cold water corals |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02087629 https://hal.science/hal-02087629/document https://hal.science/hal-02087629/file/1-s2.0-S0277379119301180-am.pdf https://doi.org/10.1016/j.quascirev.2019.03.011 |
genre |
Nordic Sea North Atlantic |
genre_facet |
Nordic Sea North Atlantic |
op_source |
ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-02087629 Quaternary Science Reviews, 2019, 211, pp.93-106. ⟨10.1016/j.quascirev.2019.03.011⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2019.03.011 hal-02087629 https://hal.science/hal-02087629 https://hal.science/hal-02087629/document https://hal.science/hal-02087629/file/1-s2.0-S0277379119301180-am.pdf doi:10.1016/j.quascirev.2019.03.011 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2019.03.011 |
container_title |
Quaternary Science Reviews |
container_volume |
211 |
container_start_page |
93 |
op_container_end_page |
106 |
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1799484137947529216 |
spelling |
ftuniversailles:oai:HAL:hal-02087629v1 2024-05-19T07:44:22+00:00 Millennial-scale variations of the Holocene North Atlantic mid-depth gyre inferred from radiocarbon and neodymium isotopes in cold water corals Colin, Christophe Tisnerat-Laborde, Nadine Mienis, Furu Collart, Tim Pons-Branchu, Edwige Dubois-Dauphin, Quentin Frank, Norbert Dapoigny, Arnaud Ayache, Mohamed Swingedouw, Didier Dutay, Jean-Claude Eynaud, Frédérique Debret, Maxime Blamart, Dominique Douville, Eric 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) Géochrononologie Traceurs Archéométrie (GEOTRAC) 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)) Universiteit Utrecht / Utrecht University Utrecht Universiteit Gent = Ghent University (UGENT) Environnements et Paléoenvironnements OCéaniques (EPOC) Observatoire aquitain des sciences de l'univers (OASU) Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-École Pratique des Hautes Études (EPHE) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Centre National de la Recherche Scientifique (CNRS) Modélisation du climat (CLIM) Morphodynamique Continentale et Côtière (M2C) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rouen Normandie (UNIROUEN) Normandie Université (NU)-Centre National de la Recherche Scientifique (CNRS) Paléocéanographie (PALEOCEAN) ANR-17-EURE-0006,IPSL-CGS,IPSL Climate graduate school(2017) ANR-10-LABX-0018,L-IPSL,LabEx Institut Pierre Simon Laplace (IPSL): Understand climate and anticipate future changes(2010) 2019-05 https://hal.science/hal-02087629 https://hal.science/hal-02087629/document https://hal.science/hal-02087629/file/1-s2.0-S0277379119301180-am.pdf https://doi.org/10.1016/j.quascirev.2019.03.011 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2019.03.011 hal-02087629 https://hal.science/hal-02087629 https://hal.science/hal-02087629/document https://hal.science/hal-02087629/file/1-s2.0-S0277379119301180-am.pdf doi:10.1016/j.quascirev.2019.03.011 info:eu-repo/semantics/OpenAccess ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-02087629 Quaternary Science Reviews, 2019, 211, pp.93-106. ⟨10.1016/j.quascirev.2019.03.011⟩ Panoply Cold-water corals Rockall Trough Holocene Nd isotopic composition radiocarbon North Atlantic gyre dynamics [SDU]Sciences of the Universe [physics] [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2019 ftuniversailles https://doi.org/10.1016/j.quascirev.2019.03.011 2024-05-02T00:02:05Z International audience Variations in North Atlantic Ocean mid-depth circulation during the Holocene are poorly understood. It is believed that they had a significant influence on the properties of water entering the Nordic Sea by redistributing heat and freshwater, potentially affecting deep-water formation and climate. To improve our knowledge of the NE Atlantic mid-depth circulation, radiocarbon and neodymium isotope analyses have been then carried out on precisely dated (U-Th) L. pertusa and M. oculata coral fragments from two sediment cores taken at ∼750 m water depth on the SW Rockall Trough margin. Cold-water coral (CWC) εNd values vary between −12.2 ± 0.3 and −16.6 ± 0.4 and result from variable contributions of unradiogenic mid-depth subpolar gyre (mid-SPG) water (∼-15) and more radiogenic Eastern North Atlantic Water (ENAW) (∼-11) which is transported northward to the Rockall Trough by boundary currents along the European margin. Increased coral εNd reflects a westward contraction of the mid-SPG water and a higher proportion of ENAW. The mid-Holocene (from 8.8 to 6.8 ka BP) is marked by unradiogenic coral εNd (from −16.6 ± 0.4 to −14.6 ± 0.5) indicating a greater eastward extension of the mid-SPG. This is followed by a shift from 6.8 to 5 ka BP toward more radiogenic εNd values (from −15.4 ± 0.3 to −13.3 ± 0.2) suggesting a westward contraction of the mid-SPG and a higher proportion of ENAW. The mid-Holocene long-term change in εNd is characterized by millennial variations of up to 2.5 epsilon units well marked during the Late Holocene, indicating that eastward extension of the mid-SPG coeval with warm periods in northern Europe (e.g. the Medieval Climatic Anomaly and the Roman Warm Period). Most of the CWC-derived Δ14C values match the global ocean values indicating that the water masses bathing the corals were generally well ventilated; the exceptions are a few short intervals of eastward extension of the mid-SPG, which are characterized by lower Δ14C during the late Holocene. We propose that these ... Article in Journal/Newspaper Nordic Sea North Atlantic Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Quaternary Science Reviews 211 93 106 |