Benthic δ 18 O records in the North Atlantic over the Last Glacial Period (60-10 kyr): Evidence for brine formation
International audience Four high-resolution benthic isotope records from North Atlantic and south Norwegian Sea cores are compared for the past 60 kyr. The benthic records show light 15•80 peaks simultaneously to or following the Heinrich events. The amplitude of these light peaks varies between 1%0...
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Format: | Article in Journal/Newspaper |
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1998
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Online Access: | https://hal.science/hal-02958584 https://hal.science/hal-02958584/document https://hal.science/hal-02958584/file/98PA00315.pdf https://doi.org/10.1029/98PA00315 |
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ftinsu:oai:HAL:hal-02958584v1 2024-04-28T08:29:37+00:00 Benthic δ 18 O records in the North Atlantic over the Last Glacial Period (60-10 kyr): Evidence for brine formation Vidal, L. Labeyrie, L. van Weering, T. 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)) Nederlands Instituut Voor Onderzoek der Zee 1998-06 https://hal.science/hal-02958584 https://hal.science/hal-02958584/document https://hal.science/hal-02958584/file/98PA00315.pdf https://doi.org/10.1029/98PA00315 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/98PA00315 hal-02958584 https://hal.science/hal-02958584 https://hal.science/hal-02958584/document https://hal.science/hal-02958584/file/98PA00315.pdf doi:10.1029/98PA00315 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.science/hal-02958584 Paleoceanography, 1998, 13 (3), pp.245-251. ⟨10.1029/98PA00315⟩ [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 1998 ftinsu https://doi.org/10.1029/98PA00315 2024-04-05T00:40:57Z International audience Four high-resolution benthic isotope records from North Atlantic and south Norwegian Sea cores are compared for the past 60 kyr. The benthic records show light 15•80 peaks simultaneously to or following the Heinrich events. The amplitude of these light peaks varies between 1%0 for the most northern core ENAM93-21 and 0.35%0 for the deep North Atlantic cores. The high 15•80 gradient between the North Atlantic cores and the Pacific core V19-30 suggests a regional influence of 15•80-depleted meltwater to deeper depth during periods of iceberg discharges. The most likely process for transferring 15•80-depleted meltwater to depth is sea ice formation induced by brine formation. During Heinrich events 4 and 3 this mecanism was of major importance (compared to open ocean convection) in the southern Norwegian Sea and at the northern boundaries of the Atlantic, leading to intermediate to deep water formation. Other 15•80 excursions appearing in all the records point to the contribution of both brine formation and global changes in the 15•80 of seawater associated with the Heinrich event periods. Article in Journal/Newspaper North Atlantic Norwegian Sea Sea ice Institut national des sciences de l'Univers: HAL-INSU Paleoceanography 13 3 245 251 |
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Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
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 Vidal, L. Labeyrie, L. van Weering, T. Benthic δ 18 O records in the North Atlantic over the Last Glacial Period (60-10 kyr): Evidence for brine formation |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Four high-resolution benthic isotope records from North Atlantic and south Norwegian Sea cores are compared for the past 60 kyr. The benthic records show light 15•80 peaks simultaneously to or following the Heinrich events. The amplitude of these light peaks varies between 1%0 for the most northern core ENAM93-21 and 0.35%0 for the deep North Atlantic cores. The high 15•80 gradient between the North Atlantic cores and the Pacific core V19-30 suggests a regional influence of 15•80-depleted meltwater to deeper depth during periods of iceberg discharges. The most likely process for transferring 15•80-depleted meltwater to depth is sea ice formation induced by brine formation. During Heinrich events 4 and 3 this mecanism was of major importance (compared to open ocean convection) in the southern Norwegian Sea and at the northern boundaries of the Atlantic, leading to intermediate to deep water formation. Other 15•80 excursions appearing in all the records point to the contribution of both brine formation and global changes in the 15•80 of seawater associated with the Heinrich event periods. |
author2 |
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)) Nederlands Instituut Voor Onderzoek der Zee |
format |
Article in Journal/Newspaper |
author |
Vidal, L. Labeyrie, L. van Weering, T. |
author_facet |
Vidal, L. Labeyrie, L. van Weering, T. |
author_sort |
Vidal, L. |
title |
Benthic δ 18 O records in the North Atlantic over the Last Glacial Period (60-10 kyr): Evidence for brine formation |
title_short |
Benthic δ 18 O records in the North Atlantic over the Last Glacial Period (60-10 kyr): Evidence for brine formation |
title_full |
Benthic δ 18 O records in the North Atlantic over the Last Glacial Period (60-10 kyr): Evidence for brine formation |
title_fullStr |
Benthic δ 18 O records in the North Atlantic over the Last Glacial Period (60-10 kyr): Evidence for brine formation |
title_full_unstemmed |
Benthic δ 18 O records in the North Atlantic over the Last Glacial Period (60-10 kyr): Evidence for brine formation |
title_sort |
benthic δ 18 o records in the north atlantic over the last glacial period (60-10 kyr): evidence for brine formation |
publisher |
HAL CCSD |
publishDate |
1998 |
url |
https://hal.science/hal-02958584 https://hal.science/hal-02958584/document https://hal.science/hal-02958584/file/98PA00315.pdf https://doi.org/10.1029/98PA00315 |
genre |
North Atlantic Norwegian Sea Sea ice |
genre_facet |
North Atlantic Norwegian Sea Sea ice |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.science/hal-02958584 Paleoceanography, 1998, 13 (3), pp.245-251. ⟨10.1029/98PA00315⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/98PA00315 hal-02958584 https://hal.science/hal-02958584 https://hal.science/hal-02958584/document https://hal.science/hal-02958584/file/98PA00315.pdf doi:10.1029/98PA00315 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/98PA00315 |
container_title |
Paleoceanography |
container_volume |
13 |
container_issue |
3 |
container_start_page |
245 |
op_container_end_page |
251 |
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1797587741874061312 |