Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination
International audience The past evolution of the Southern Ocean, one of the major components of the climatic system, is still a matter of debate. This study provides new insights into the deep Southern Ocean circulation based on the radiogenic isotopes and clay mineralogical signature of the terrige...
Published in: | Quaternary Science Reviews |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2020
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Online Access: | https://hal.science/hal-02992431 https://hal.science/hal-02992431/document https://hal.science/hal-02992431/file/Beny,%202020-QSR.pdf https://doi.org/10.1016/j.quascirev.2019.106089 |
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Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
[SDE]Environmental Sciences [SDU]Sciences of the Universe [physics] [SDV]Life Sciences [q-bio] [PHYS]Physics [physics] |
spellingShingle |
[SDE]Environmental Sciences [SDU]Sciences of the Universe [physics] [SDV]Life Sciences [q-bio] [PHYS]Physics [physics] Beny, F Bout‑roumazeilles, Viviane Davies, G, R Waelbroeck, C Bory, A Tribovillard, N Delattre, M Abraham, R Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination |
topic_facet |
[SDE]Environmental Sciences [SDU]Sciences of the Universe [physics] [SDV]Life Sciences [q-bio] [PHYS]Physics [physics] |
description |
International audience The past evolution of the Southern Ocean, one of the major components of the climatic system, is still a matter of debate. This study provides new insights into the deep Southern Ocean circulation based on the radiogenic isotopes and clay mineralogical signature of the terrigenous fractions transported by the main deep water masses to sediments recovered in core MD07-3076Q from the central South Atlantic. This approach successfully permits: (1) provenance identification of the various grain-size fractions (clay, cohesive silt and sortable silt); (2) assignment of each grain-size fraction to a specific water-mass; (3) reconstruction of past changes in the main deep water-mass pathways. These data document the evolution of deep-water masses in the South Atlantic Ocean during the last deglaciation. The Antarctic Bottom Water (AABW) speed and northward extension were maximum at the end of the Last Glacial Maximum (LGM), associated with strong bottom water production in the Weddell Sea, together with a vigorous Lower Circumpolar Deep Water (LCDW). In contrast the North Atlantic Deep Water (NADW) circulation was weaker than today. The onset of the deglaciation (from 17.5 ka to 15 ka,~Heinrich Stadial 1, HS 1) was marked by weakening and southerly retreat of the AABW and by an increase of mixing between AABW and LCDW. The speed of the AABW remained at its lowest during the Bølling Allerød (B/ A) and the Younger Dryas (YD), and the LCDW slowed and retreated to the south, while the NADW progressively migrated southward, deepened, and strengthened between the beginning of the Bølling Allerød and the Holocene (from~15 to 10 ka). |
author2 |
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Vrije Universiteit Amsterdam Amsterdam (VU) 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)) |
format |
Article in Journal/Newspaper |
author |
Beny, F Bout‑roumazeilles, Viviane Davies, G, R Waelbroeck, C Bory, A Tribovillard, N Delattre, M Abraham, R |
author_facet |
Beny, F Bout‑roumazeilles, Viviane Davies, G, R Waelbroeck, C Bory, A Tribovillard, N Delattre, M Abraham, R |
author_sort |
Beny, F |
title |
Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination |
title_short |
Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination |
title_full |
Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination |
title_fullStr |
Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination |
title_full_unstemmed |
Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination |
title_sort |
radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: new insights into south atlantic deep circulation during the last termination |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02992431 https://hal.science/hal-02992431/document https://hal.science/hal-02992431/file/Beny,%202020-QSR.pdf https://doi.org/10.1016/j.quascirev.2019.106089 |
geographic |
Antarctic Southern Ocean The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Southern Ocean The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic South Atlantic Ocean Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic South Atlantic Ocean Southern Ocean Weddell Sea |
op_source |
ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-02992431 Quaternary Science Reviews, 2020, 228, ⟨10.1016/j.quascirev.2019.106089⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2019.106089 hal-02992431 https://hal.science/hal-02992431 https://hal.science/hal-02992431/document https://hal.science/hal-02992431/file/Beny,%202020-QSR.pdf doi:10.1016/j.quascirev.2019.106089 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2019.106089 |
container_title |
Quaternary Science Reviews |
container_volume |
228 |
container_start_page |
106089 |
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1802643179679252480 |
spelling |
ftceafr:oai:HAL:hal-02992431v1 2024-06-23T07:45:57+00:00 Radiogenic isotopic and clay mineralogical signatures of terrigenous particles as water-mass tracers: New insights into South Atlantic deep circulation during the last termination Beny, F Bout‑roumazeilles, Viviane Davies, G, R Waelbroeck, C Bory, A Tribovillard, N Delattre, M Abraham, R Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) Vrije Universiteit Amsterdam Amsterdam (VU) 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)) 2020-01 https://hal.science/hal-02992431 https://hal.science/hal-02992431/document https://hal.science/hal-02992431/file/Beny,%202020-QSR.pdf https://doi.org/10.1016/j.quascirev.2019.106089 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2019.106089 hal-02992431 https://hal.science/hal-02992431 https://hal.science/hal-02992431/document https://hal.science/hal-02992431/file/Beny,%202020-QSR.pdf doi:10.1016/j.quascirev.2019.106089 info:eu-repo/semantics/OpenAccess ISSN: 0277-3791 EISSN: 1873-457X Quaternary Science Reviews https://hal.science/hal-02992431 Quaternary Science Reviews, 2020, 228, ⟨10.1016/j.quascirev.2019.106089⟩ [SDE]Environmental Sciences [SDU]Sciences of the Universe [physics] [SDV]Life Sciences [q-bio] [PHYS]Physics [physics] info:eu-repo/semantics/article Journal articles 2020 ftceafr https://doi.org/10.1016/j.quascirev.2019.106089 2024-06-03T23:45:30Z International audience The past evolution of the Southern Ocean, one of the major components of the climatic system, is still a matter of debate. This study provides new insights into the deep Southern Ocean circulation based on the radiogenic isotopes and clay mineralogical signature of the terrigenous fractions transported by the main deep water masses to sediments recovered in core MD07-3076Q from the central South Atlantic. This approach successfully permits: (1) provenance identification of the various grain-size fractions (clay, cohesive silt and sortable silt); (2) assignment of each grain-size fraction to a specific water-mass; (3) reconstruction of past changes in the main deep water-mass pathways. These data document the evolution of deep-water masses in the South Atlantic Ocean during the last deglaciation. The Antarctic Bottom Water (AABW) speed and northward extension were maximum at the end of the Last Glacial Maximum (LGM), associated with strong bottom water production in the Weddell Sea, together with a vigorous Lower Circumpolar Deep Water (LCDW). In contrast the North Atlantic Deep Water (NADW) circulation was weaker than today. The onset of the deglaciation (from 17.5 ka to 15 ka,~Heinrich Stadial 1, HS 1) was marked by weakening and southerly retreat of the AABW and by an increase of mixing between AABW and LCDW. The speed of the AABW remained at its lowest during the Bølling Allerød (B/ A) and the Younger Dryas (YD), and the LCDW slowed and retreated to the south, while the NADW progressively migrated southward, deepened, and strengthened between the beginning of the Bølling Allerød and the Holocene (from~15 to 10 ka). Article in Journal/Newspaper Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic South Atlantic Ocean Southern Ocean Weddell Sea HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Antarctic Southern Ocean The Antarctic Weddell Weddell Sea Quaternary Science Reviews 228 106089 |