Simulating marine neodymium isotope distributions using Nd v1.0 coupled to the ocean component of the FAMOUS-MOSES1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions
International audience The neodymium (Nd) isotopic composition of seawater is a widely used ocean circulation tracer. However, uncertainty in quantifying the global ocean Nd budget, particularly constraining elusive non-conservative processes, remains a major challenge. A substantial increase in mod...
Published in: | Geoscientific Model Development |
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Online Access: | https://insu.hal.science/insu-04131495 https://insu.hal.science/insu-04131495/document https://insu.hal.science/insu-04131495/file/gmd-16-1231-2023.pdf https://doi.org/10.5194/gmd-16-1231-2023 |
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ftccsdartic:oai:HAL:insu-04131495v1 2023-12-17T10:47:00+01:00 Simulating marine neodymium isotope distributions using Nd v1.0 coupled to the ocean component of the FAMOUS-MOSES1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions Robinson, Suzanne Ivanovic, Ruza F. Gregoire, Lauren J. Tindall, Julia van de Flierdt, Tina Plancherel, Yves Pöppelmeier, Frerk Tachikawa, Kazuyo Valdes, Paul J. Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) 2023 https://insu.hal.science/insu-04131495 https://insu.hal.science/insu-04131495/document https://insu.hal.science/insu-04131495/file/gmd-16-1231-2023.pdf https://doi.org/10.5194/gmd-16-1231-2023 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-16-1231-2023 insu-04131495 https://insu.hal.science/insu-04131495 https://insu.hal.science/insu-04131495/document https://insu.hal.science/insu-04131495/file/gmd-16-1231-2023.pdf BIBCODE: 2023GMD.16.1231R doi:10.5194/gmd-16-1231-2023 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://insu.hal.science/insu-04131495 Geoscientific Model Development, 2023, 16, pp.1231-1264. ⟨10.5194/gmd-16-1231-2023⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftccsdartic https://doi.org/10.5194/gmd-16-1231-2023 2023-11-18T23:47:18Z International audience The neodymium (Nd) isotopic composition of seawater is a widely used ocean circulation tracer. However, uncertainty in quantifying the global ocean Nd budget, particularly constraining elusive non-conservative processes, remains a major challenge. A substantial increase in modern seawater Nd measurements from the GEOTRACES programme, coupled with recent hypotheses that a seafloor-wide benthic Nd flux to the ocean may govern global Nd isotope distributions (ε Nd ), presents an opportunity to develop a new scheme specifically designed to test these paradigms. Here, we present the implementation of Nd isotopes ( 143 Nd and 144 Nd) into the ocean component of the FAMOUS coupled atmosphere-ocean general circulation model (Nd v1.0), a tool which can be widely used for simulating complex feedbacks between different Earth system processes on decadal to multi-millennial timescales. Using an equilibrium pre-industrial simulation tuned to represent the large-scale Atlantic Ocean circulation, we perform a series of sensitivity tests evaluating the new Nd isotope scheme. We investigate how Nd source and sink and cycling parameters govern global marine ε Nd distributions and provide an updated compilation of 6048 Nd concentrations and 3278 ε Nd measurements to assess model performance. Our findings support the notions that reversible scavenging is a key process for enhancing the Atlantic-Pacific basinal ε Nd gradient and is capable of driving the observed increase in Nd concentration along the global circulation pathway. A benthic flux represents a major source of Nd to the deep ocean. However, model-data disparities in the North Pacific highlight that under a uniform benthic flux, the source of ε Nd from seafloor sediments is too non-radiogenic in our model to be able to accurately represent seawater measurements. Additionally, model-data mismatch in the northern North Atlantic alludes to the possibility of preferential contributions from "reactive" non-radiogenic detrital sediments. The new Nd ... Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Geoscientific Model Development 16 4 1231 1264 |
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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] Robinson, Suzanne Ivanovic, Ruza F. Gregoire, Lauren J. Tindall, Julia van de Flierdt, Tina Plancherel, Yves Pöppelmeier, Frerk Tachikawa, Kazuyo Valdes, Paul J. Simulating marine neodymium isotope distributions using Nd v1.0 coupled to the ocean component of the FAMOUS-MOSES1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The neodymium (Nd) isotopic composition of seawater is a widely used ocean circulation tracer. However, uncertainty in quantifying the global ocean Nd budget, particularly constraining elusive non-conservative processes, remains a major challenge. A substantial increase in modern seawater Nd measurements from the GEOTRACES programme, coupled with recent hypotheses that a seafloor-wide benthic Nd flux to the ocean may govern global Nd isotope distributions (ε Nd ), presents an opportunity to develop a new scheme specifically designed to test these paradigms. Here, we present the implementation of Nd isotopes ( 143 Nd and 144 Nd) into the ocean component of the FAMOUS coupled atmosphere-ocean general circulation model (Nd v1.0), a tool which can be widely used for simulating complex feedbacks between different Earth system processes on decadal to multi-millennial timescales. Using an equilibrium pre-industrial simulation tuned to represent the large-scale Atlantic Ocean circulation, we perform a series of sensitivity tests evaluating the new Nd isotope scheme. We investigate how Nd source and sink and cycling parameters govern global marine ε Nd distributions and provide an updated compilation of 6048 Nd concentrations and 3278 ε Nd measurements to assess model performance. Our findings support the notions that reversible scavenging is a key process for enhancing the Atlantic-Pacific basinal ε Nd gradient and is capable of driving the observed increase in Nd concentration along the global circulation pathway. A benthic flux represents a major source of Nd to the deep ocean. However, model-data disparities in the North Pacific highlight that under a uniform benthic flux, the source of ε Nd from seafloor sediments is too non-radiogenic in our model to be able to accurately represent seawater measurements. Additionally, model-data mismatch in the northern North Atlantic alludes to the possibility of preferential contributions from "reactive" non-radiogenic detrital sediments. The new Nd ... |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE) |
format |
Article in Journal/Newspaper |
author |
Robinson, Suzanne Ivanovic, Ruza F. Gregoire, Lauren J. Tindall, Julia van de Flierdt, Tina Plancherel, Yves Pöppelmeier, Frerk Tachikawa, Kazuyo Valdes, Paul J. |
author_facet |
Robinson, Suzanne Ivanovic, Ruza F. Gregoire, Lauren J. Tindall, Julia van de Flierdt, Tina Plancherel, Yves Pöppelmeier, Frerk Tachikawa, Kazuyo Valdes, Paul J. |
author_sort |
Robinson, Suzanne |
title |
Simulating marine neodymium isotope distributions using Nd v1.0 coupled to the ocean component of the FAMOUS-MOSES1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions |
title_short |
Simulating marine neodymium isotope distributions using Nd v1.0 coupled to the ocean component of the FAMOUS-MOSES1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions |
title_full |
Simulating marine neodymium isotope distributions using Nd v1.0 coupled to the ocean component of the FAMOUS-MOSES1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions |
title_fullStr |
Simulating marine neodymium isotope distributions using Nd v1.0 coupled to the ocean component of the FAMOUS-MOSES1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions |
title_full_unstemmed |
Simulating marine neodymium isotope distributions using Nd v1.0 coupled to the ocean component of the FAMOUS-MOSES1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions |
title_sort |
simulating marine neodymium isotope distributions using nd v1.0 coupled to the ocean component of the famous-moses1 climate model: sensitivities to reversible scavenging efficiency and benthic source distributions |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-04131495 https://insu.hal.science/insu-04131495/document https://insu.hal.science/insu-04131495/file/gmd-16-1231-2023.pdf https://doi.org/10.5194/gmd-16-1231-2023 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://insu.hal.science/insu-04131495 Geoscientific Model Development, 2023, 16, pp.1231-1264. ⟨10.5194/gmd-16-1231-2023⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-16-1231-2023 insu-04131495 https://insu.hal.science/insu-04131495 https://insu.hal.science/insu-04131495/document https://insu.hal.science/insu-04131495/file/gmd-16-1231-2023.pdf BIBCODE: 2023GMD.16.1231R doi:10.5194/gmd-16-1231-2023 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/gmd-16-1231-2023 |
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Geoscientific Model Development |
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