Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate
Reconstructing Northern Hemisphere ice-sheet oscillations and meltwater routing to the ocean is important to better understand the mechanisms behind abrupt climate changes. To date, research efforts have mainly focused on the North American (Laurentide) ice-sheets (LIS), leaving the potential role o...
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Online Access: | https://hal.science/hal-04200658 https://doi.org/10.1016/j.quascirev.2015.06.010 |
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ftccsdartic:oai:HAL:hal-04200658v1 2023-10-09T21:52:23+02:00 Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate Toucanne, Samuel Soulet, Guillaume Freslon, Nicolas Jacinto, Ricardo Silva Dennielou, Bernard Zaragosi, Sebastien Eynaud, Frederique Bourillet, Jean-Francois Bayon, Germain Laboratoire Environnements Sédimentaires (LES) Géosciences Marines (GM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Laboratoire Géochimie et Métallogénie (LGM) 2015-09 https://hal.science/hal-04200658 https://doi.org/10.1016/j.quascirev.2015.06.010 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2015.06.010 hal-04200658 https://hal.science/hal-04200658 doi:10.1016/j.quascirev.2015.06.010 ISSN: 0277-3791 Quaternary Science Reviews https://hal.science/hal-04200658 Quaternary Science Reviews, 2015, 123, pp.113-133. ⟨10.1016/j.quascirev.2015.06.010⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.1016/j.quascirev.2015.06.010 2023-09-23T22:56:50Z Reconstructing Northern Hemisphere ice-sheet oscillations and meltwater routing to the ocean is important to better understand the mechanisms behind abrupt climate changes. To date, research efforts have mainly focused on the North American (Laurentide) ice-sheets (LIS), leaving the potential role of the European Ice Sheet (EIS), and of the Scandinavian ice-sheet (SIS) in particular, largely unexplored. Using neodymium isotopes in detrital sediments deposited off the Channel River, we provide a continuous and well-dated record for the evolution of the EIS southern margin through the end of the last glacial period and during the deglaciation. Our results reveal that the evolution of EIS margins was accompanied with substantial ice recession (especially of the SIS) and simultaneous release of meltwater to the North Atlantic. These events occurred both in the course of the EIS to its LGM position (i.e., during Heinrich Stadial –HS– 3 and HS2; ∼31–29 ka and ∼26–23 ka, respectively) and during the deglaciation (i.e., at ∼22 ka, ∼20–19 ka and from 18.2 ± 0.2 to 16.7 ± 0.2 ka that corresponds to the first part of HS1). The deglaciation was discontinuous in character, and similar in timing to that of the southern LIS margin, with moderate ice-sheet retreat (from 22.5 ± 0.2 ka in the Baltic lowlands) as soon as the northern summer insolation increase (from ∼23 ka) and an acceleration of the margin retreat thereafter (from ∼20 ka). Importantly, our results show that EIS retreat events and release of meltwater to the North Atlantic during the deglaciation coincide with AMOC destabilisation and interhemispheric climate changes. They thus suggest that the EIS, together with the LIS, could have played a critical role in the climatic reorganization that accompanied the last deglaciation. Finally, our data suggest that meltwater discharges to the North Atlantic produced by large-scale recession of continental parts of Northern Hemisphere ice sheets during HS, could have been a possible source for the oceanic perturbations ... Article in Journal/Newspaper Ice Sheet North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Quaternary Science Reviews 123 113 133 |
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Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Toucanne, Samuel Soulet, Guillaume Freslon, Nicolas Jacinto, Ricardo Silva Dennielou, Bernard Zaragosi, Sebastien Eynaud, Frederique Bourillet, Jean-Francois Bayon, Germain Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
Reconstructing Northern Hemisphere ice-sheet oscillations and meltwater routing to the ocean is important to better understand the mechanisms behind abrupt climate changes. To date, research efforts have mainly focused on the North American (Laurentide) ice-sheets (LIS), leaving the potential role of the European Ice Sheet (EIS), and of the Scandinavian ice-sheet (SIS) in particular, largely unexplored. Using neodymium isotopes in detrital sediments deposited off the Channel River, we provide a continuous and well-dated record for the evolution of the EIS southern margin through the end of the last glacial period and during the deglaciation. Our results reveal that the evolution of EIS margins was accompanied with substantial ice recession (especially of the SIS) and simultaneous release of meltwater to the North Atlantic. These events occurred both in the course of the EIS to its LGM position (i.e., during Heinrich Stadial –HS– 3 and HS2; ∼31–29 ka and ∼26–23 ka, respectively) and during the deglaciation (i.e., at ∼22 ka, ∼20–19 ka and from 18.2 ± 0.2 to 16.7 ± 0.2 ka that corresponds to the first part of HS1). The deglaciation was discontinuous in character, and similar in timing to that of the southern LIS margin, with moderate ice-sheet retreat (from 22.5 ± 0.2 ka in the Baltic lowlands) as soon as the northern summer insolation increase (from ∼23 ka) and an acceleration of the margin retreat thereafter (from ∼20 ka). Importantly, our results show that EIS retreat events and release of meltwater to the North Atlantic during the deglaciation coincide with AMOC destabilisation and interhemispheric climate changes. They thus suggest that the EIS, together with the LIS, could have played a critical role in the climatic reorganization that accompanied the last deglaciation. Finally, our data suggest that meltwater discharges to the North Atlantic produced by large-scale recession of continental parts of Northern Hemisphere ice sheets during HS, could have been a possible source for the oceanic perturbations ... |
author2 |
Laboratoire Environnements Sédimentaires (LES) Géosciences Marines (GM) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) Laboratoire Géochimie et Métallogénie (LGM) |
format |
Article in Journal/Newspaper |
author |
Toucanne, Samuel Soulet, Guillaume Freslon, Nicolas Jacinto, Ricardo Silva Dennielou, Bernard Zaragosi, Sebastien Eynaud, Frederique Bourillet, Jean-Francois Bayon, Germain |
author_facet |
Toucanne, Samuel Soulet, Guillaume Freslon, Nicolas Jacinto, Ricardo Silva Dennielou, Bernard Zaragosi, Sebastien Eynaud, Frederique Bourillet, Jean-Francois Bayon, Germain |
author_sort |
Toucanne, Samuel |
title |
Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate |
title_short |
Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate |
title_full |
Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate |
title_fullStr |
Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate |
title_full_unstemmed |
Millennial-scale fluctuations of the European Ice Sheet at the end of the last glacial, and their potential impact on global climate |
title_sort |
millennial-scale fluctuations of the european ice sheet at the end of the last glacial, and their potential impact on global climate |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-04200658 https://doi.org/10.1016/j.quascirev.2015.06.010 |
genre |
Ice Sheet North Atlantic |
genre_facet |
Ice Sheet North Atlantic |
op_source |
ISSN: 0277-3791 Quaternary Science Reviews https://hal.science/hal-04200658 Quaternary Science Reviews, 2015, 123, pp.113-133. ⟨10.1016/j.quascirev.2015.06.010⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2015.06.010 hal-04200658 https://hal.science/hal-04200658 doi:10.1016/j.quascirev.2015.06.010 |
op_doi |
https://doi.org/10.1016/j.quascirev.2015.06.010 |
container_title |
Quaternary Science Reviews |
container_volume |
123 |
container_start_page |
113 |
op_container_end_page |
133 |
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1779315544216829952 |