The timing of the last deglaciation in North Atlantic climate records
International audience To determine the mechanisms governing the last deglaciation and the sequence of events that lead to deglaciation, it is important to obtain a temporal framework that applies to both continental and marine climate records. Radiocarbon dating has been widely used to derive calen...
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ftecolephe:oai:HAL:hal-02913470v1 2024-06-09T07:48:02+00:00 The timing of the last deglaciation in North Atlantic climate records Waelbroeck, Claire Duplessy, Jean-Claude Michel, Elisabeth Labeyrie, Laurent Paillard, Didier Duprat, Josette Paléocéanographie (PALEOCEAN) 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)-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) Modélisation du climat (CLIM) 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) 2001-08 https://hal.science/hal-02913470 https://doi.org/10.1038/35089060 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/35089060 hal-02913470 https://hal.science/hal-02913470 doi:10.1038/35089060 WOS: 000170450200041 ISSN: 0028-0836 EISSN: 1476-4687 Nature https://hal.science/hal-02913470 Nature, 2001, 412 (6848), pp.724-727. ⟨10.1038/35089060⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment info:eu-repo/semantics/article Journal articles 2001 ftecolephe https://doi.org/10.1038/35089060 2024-05-16T11:03:11Z International audience To determine the mechanisms governing the last deglaciation and the sequence of events that lead to deglaciation, it is important to obtain a temporal framework that applies to both continental and marine climate records. Radiocarbon dating has been widely used to derive calendar dates for marine sediments, but it rests on the assumption that the `apparent age' of surface water (the age of surface water relative to the atmosphere) has remained constant over time. Here we present new evidence for variation in the apparent age of surface water (or reservoir age) in the North Atlantic ocean north of 40°N over the past 20,000 years. In two cores we found apparent surface-water ages to be larger than those of today by 1,230 +/- 600 and 1,940 +/- 750 years at the end of the Heinrich 1 surge event (15,000 years BP) and by 820 +/- 430 to 1,010 +/- 340 years at the end of the Younger Dryas cold episode. During the warm Bølling-Allerød period, between these two periods of large reservoir ages, apparent surface-water ages were comparable to present values. Our results allow us to reconcile the chronologies from ice cores and the North Atlantic marine records over the entire deglaciation period. Moreover, the data imply that marine carbon dates from the North Atlantic north of 40°N will need to be corrected for these highly variable effects. Article in Journal/Newspaper North Atlantic EPHE (Ecole pratique des hautes études, Paris): HAL Nature 412 6848 724 727 |
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Open Polar |
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EPHE (Ecole pratique des hautes études, Paris): HAL |
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ftecolephe |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Waelbroeck, Claire Duplessy, Jean-Claude Michel, Elisabeth Labeyrie, Laurent Paillard, Didier Duprat, Josette The timing of the last deglaciation in North Atlantic climate records |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience To determine the mechanisms governing the last deglaciation and the sequence of events that lead to deglaciation, it is important to obtain a temporal framework that applies to both continental and marine climate records. Radiocarbon dating has been widely used to derive calendar dates for marine sediments, but it rests on the assumption that the `apparent age' of surface water (the age of surface water relative to the atmosphere) has remained constant over time. Here we present new evidence for variation in the apparent age of surface water (or reservoir age) in the North Atlantic ocean north of 40°N over the past 20,000 years. In two cores we found apparent surface-water ages to be larger than those of today by 1,230 +/- 600 and 1,940 +/- 750 years at the end of the Heinrich 1 surge event (15,000 years BP) and by 820 +/- 430 to 1,010 +/- 340 years at the end of the Younger Dryas cold episode. During the warm Bølling-Allerød period, between these two periods of large reservoir ages, apparent surface-water ages were comparable to present values. Our results allow us to reconcile the chronologies from ice cores and the North Atlantic marine records over the entire deglaciation period. Moreover, the data imply that marine carbon dates from the North Atlantic north of 40°N will need to be corrected for these highly variable effects. |
author2 |
Paléocéanographie (PALEOCEAN) 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)-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) Modélisation du climat (CLIM) 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) |
format |
Article in Journal/Newspaper |
author |
Waelbroeck, Claire Duplessy, Jean-Claude Michel, Elisabeth Labeyrie, Laurent Paillard, Didier Duprat, Josette |
author_facet |
Waelbroeck, Claire Duplessy, Jean-Claude Michel, Elisabeth Labeyrie, Laurent Paillard, Didier Duprat, Josette |
author_sort |
Waelbroeck, Claire |
title |
The timing of the last deglaciation in North Atlantic climate records |
title_short |
The timing of the last deglaciation in North Atlantic climate records |
title_full |
The timing of the last deglaciation in North Atlantic climate records |
title_fullStr |
The timing of the last deglaciation in North Atlantic climate records |
title_full_unstemmed |
The timing of the last deglaciation in North Atlantic climate records |
title_sort |
timing of the last deglaciation in north atlantic climate records |
publisher |
HAL CCSD |
publishDate |
2001 |
url |
https://hal.science/hal-02913470 https://doi.org/10.1038/35089060 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 0028-0836 EISSN: 1476-4687 Nature https://hal.science/hal-02913470 Nature, 2001, 412 (6848), pp.724-727. ⟨10.1038/35089060⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1038/35089060 hal-02913470 https://hal.science/hal-02913470 doi:10.1038/35089060 WOS: 000170450200041 |
op_doi |
https://doi.org/10.1038/35089060 |
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Nature |
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412 |
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6848 |
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724 |
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727 |
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1801379572263944192 |