On the relationship between Nd isotopic composition and ocean overturning circulation in idealized freshwater discharge events
International audience Using a cost-efficient climate model, the effect of changes in overturning circulation on neodymium isotopic composition, Nd , is systematically examined for the first time. Idealized sequences of abrupt climate changes are induced by the application of periodic freshwater flu...
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Online Access: | https://hal.science/hal-03096624 https://hal.science/hal-03096624/document https://hal.science/hal-03096624/file/2012PA002312.pdf https://doi.org/10.1029/2012PA002312 |
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ftuniversailles:oai:HAL:hal-03096624v1 2024-04-28T07:59:16+00:00 On the relationship between Nd isotopic composition and ocean overturning circulation in idealized freshwater discharge events Rempfer, Johannes Stocker, Thomas Joos, Fortunat Dutay, Jean-Claude Oeschger Centre for Climate Change Research (OCCR) Universität Bern / University of Bern (UNIBE) 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) Modélisation du climat (CLIM) 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)) 2012-09 https://hal.science/hal-03096624 https://hal.science/hal-03096624/document https://hal.science/hal-03096624/file/2012PA002312.pdf https://doi.org/10.1029/2012PA002312 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2012PA002312 hal-03096624 https://hal.science/hal-03096624 https://hal.science/hal-03096624/document https://hal.science/hal-03096624/file/2012PA002312.pdf doi:10.1029/2012PA002312 info:eu-repo/semantics/OpenAccess ISSN: 0883-8305 Paleoceanography https://hal.science/hal-03096624 Paleoceanography, 2012, 27 (3), pp.n/a-n/a. ⟨10.1029/2012PA002312⟩ [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 2012 ftuniversailles https://doi.org/10.1029/2012PA002312 2024-04-04T17:35:12Z International audience Using a cost-efficient climate model, the effect of changes in overturning circulation on neodymium isotopic composition, Nd , is systematically examined for the first time. Idealized sequences of abrupt climate changes are induced by the application of periodic freshwater fluxes to the North Atlantic (NA) and the Southern Ocean (SO), thus mainly affecting either the formation of North Atlantic Deep Water (NADW) or Antarctic Bottom Water (AABW). Variations in Nd reflect weakening and strengthening of the formation of NADW and AABW, changes in Nd of end-members are relatively small. Relationships between Nd and the strength of NADW or AABW are more pronounced for AABW than for NADW. Atlantic patterns of variations in Nd systematically differ between NA and SO experiments. Additionally, the signature of changes in Nd in the Atlantic and the Pacific is alike in NA but opposite in SO experiments. Discrimination between NA and SO experiments is therefore possible based on the Atlantic pattern of variations in Nd and the contrariwise behavior of Nd in the Atlantic and the Pacific. In further experiments we examined the effect of variations in magnitudes of particle export fluxes. Within the examined range, and although settling particles represent the only sink of Nd, their effects on Nd are relatively small. Our results confirm the large potential of Nd as a paleocirculation tracer but also indicate its limitations of quantitative reconstructions of changes in the Atlantic Meridional Ocean Circulation. Article in Journal/Newspaper Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic Southern Ocean Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Paleoceanography 27 3 n/a n/a |
institution |
Open Polar |
collection |
Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
op_collection_id |
ftuniversailles |
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 Rempfer, Johannes Stocker, Thomas Joos, Fortunat Dutay, Jean-Claude On the relationship between Nd isotopic composition and ocean overturning circulation in idealized freshwater discharge events |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment |
description |
International audience Using a cost-efficient climate model, the effect of changes in overturning circulation on neodymium isotopic composition, Nd , is systematically examined for the first time. Idealized sequences of abrupt climate changes are induced by the application of periodic freshwater fluxes to the North Atlantic (NA) and the Southern Ocean (SO), thus mainly affecting either the formation of North Atlantic Deep Water (NADW) or Antarctic Bottom Water (AABW). Variations in Nd reflect weakening and strengthening of the formation of NADW and AABW, changes in Nd of end-members are relatively small. Relationships between Nd and the strength of NADW or AABW are more pronounced for AABW than for NADW. Atlantic patterns of variations in Nd systematically differ between NA and SO experiments. Additionally, the signature of changes in Nd in the Atlantic and the Pacific is alike in NA but opposite in SO experiments. Discrimination between NA and SO experiments is therefore possible based on the Atlantic pattern of variations in Nd and the contrariwise behavior of Nd in the Atlantic and the Pacific. In further experiments we examined the effect of variations in magnitudes of particle export fluxes. Within the examined range, and although settling particles represent the only sink of Nd, their effects on Nd are relatively small. Our results confirm the large potential of Nd as a paleocirculation tracer but also indicate its limitations of quantitative reconstructions of changes in the Atlantic Meridional Ocean Circulation. |
author2 |
Oeschger Centre for Climate Change Research (OCCR) Universität Bern / University of Bern (UNIBE) 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) Modélisation du climat (CLIM) 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 |
Rempfer, Johannes Stocker, Thomas Joos, Fortunat Dutay, Jean-Claude |
author_facet |
Rempfer, Johannes Stocker, Thomas Joos, Fortunat Dutay, Jean-Claude |
author_sort |
Rempfer, Johannes |
title |
On the relationship between Nd isotopic composition and ocean overturning circulation in idealized freshwater discharge events |
title_short |
On the relationship between Nd isotopic composition and ocean overturning circulation in idealized freshwater discharge events |
title_full |
On the relationship between Nd isotopic composition and ocean overturning circulation in idealized freshwater discharge events |
title_fullStr |
On the relationship between Nd isotopic composition and ocean overturning circulation in idealized freshwater discharge events |
title_full_unstemmed |
On the relationship between Nd isotopic composition and ocean overturning circulation in idealized freshwater discharge events |
title_sort |
on the relationship between nd isotopic composition and ocean overturning circulation in idealized freshwater discharge events |
publisher |
HAL CCSD |
publishDate |
2012 |
url |
https://hal.science/hal-03096624 https://hal.science/hal-03096624/document https://hal.science/hal-03096624/file/2012PA002312.pdf https://doi.org/10.1029/2012PA002312 |
genre |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic NADW North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
ISSN: 0883-8305 Paleoceanography https://hal.science/hal-03096624 Paleoceanography, 2012, 27 (3), pp.n/a-n/a. ⟨10.1029/2012PA002312⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2012PA002312 hal-03096624 https://hal.science/hal-03096624 https://hal.science/hal-03096624/document https://hal.science/hal-03096624/file/2012PA002312.pdf doi:10.1029/2012PA002312 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2012PA002312 |
container_title |
Paleoceanography |
container_volume |
27 |
container_issue |
3 |
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n/a |
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1797572105452126208 |