Neodymium budget in the modern ocean and paleo-oceanographic implications
International audience The oceanic Nd budget is calculated using a steady state 10-box model and a compilation of field data. This is the first attempt to propose consistent estimates of the Nd fluxes entering the ocean, as well as indicating possible Nd sources and the proportion of Nd fluxes excha...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2003
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Online Access: | https://hal.archives-ouvertes.fr/hal-01463334 https://hal.archives-ouvertes.fr/hal-01463334/document https://hal.archives-ouvertes.fr/hal-01463334/file/1999JC000285.pdf https://doi.org/10.1029/1999JC000285 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
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language |
English |
topic |
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] |
spellingShingle |
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] Tachikawa, K Athias, V Jeandel, C Neodymium budget in the modern ocean and paleo-oceanographic implications |
topic_facet |
[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] |
description |
International audience The oceanic Nd budget is calculated using a steady state 10-box model and a compilation of field data. This is the first attempt to propose consistent estimates of the Nd fluxes entering the ocean, as well as indicating possible Nd sources and the proportion of Nd fluxes exchanged between dissolved and particulate fractions. With presently available Nd data the best estimates give a total Nd influx of 9 x 10(9) g/yr, which leads to an oceanic Nd residence time of 500 years. From modeling tests we suggest that the authigenic Nd scavenged by particulates is 100% remineralized in the deep ocean. The total exchanged Nd flux may be as high as 2 x 10(10) g/yr. The epsilon(Nd(0)) values of the influxes are -22, -11, +1, and -4 for the North Atlantic, surface Atlantic, North Pacific, and surface Indo-Pacific regions, respectively. Atmospheric and riverine Nd fluxes are insufficient to explain the magnitude and regional variability of calculated Nd influxes and epsilon(Nd(0)). We propose continental margins as an additional source supplying Nd to the ocean. Using the model calibrated for Nd, we examine the sensitivity of deep water epsilon(Nd(0)) to variations of Nd inputs to the ocean. Deep water Nd concentrations and epsilon(Nd(0)) vary with the changes in Nd influxes and their epsilon(Nd(0)). As Nd sources to the ocean may change during glacial/interglacial periods, the epsilon(Nd(0)) shifts recorded in ferromanganese nodules and crusts do not necessarily reflect changes in paleoceanic circulation. The effects of continental erosion should be considered in reconstructing patterns of ocean circulation using Nd isotopes. |
author2 |
Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) GEOMAR LEGOS Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Tachikawa, K Athias, V Jeandel, C |
author_facet |
Tachikawa, K Athias, V Jeandel, C |
author_sort |
Tachikawa, K |
title |
Neodymium budget in the modern ocean and paleo-oceanographic implications |
title_short |
Neodymium budget in the modern ocean and paleo-oceanographic implications |
title_full |
Neodymium budget in the modern ocean and paleo-oceanographic implications |
title_fullStr |
Neodymium budget in the modern ocean and paleo-oceanographic implications |
title_full_unstemmed |
Neodymium budget in the modern ocean and paleo-oceanographic implications |
title_sort |
neodymium budget in the modern ocean and paleo-oceanographic implications |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.archives-ouvertes.fr/hal-01463334 https://hal.archives-ouvertes.fr/hal-01463334/document https://hal.archives-ouvertes.fr/hal-01463334/file/1999JC000285.pdf https://doi.org/10.1029/1999JC000285 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.archives-ouvertes.fr/hal-01463334 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2003, 108 (C8), ⟨10.1029/1999JC000285⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JC000285 hal-01463334 https://hal.archives-ouvertes.fr/hal-01463334 https://hal.archives-ouvertes.fr/hal-01463334/document https://hal.archives-ouvertes.fr/hal-01463334/file/1999JC000285.pdf doi:10.1029/1999JC000285 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/1999JC000285 |
container_title |
Journal of Geophysical Research |
container_volume |
108 |
container_issue |
C8 |
_version_ |
1766134409972416512 |
spelling |
ftccsdartic:oai:HAL:hal-01463334v1 2023-05-15T17:35:17+02:00 Neodymium budget in the modern ocean and paleo-oceanographic implications Tachikawa, K Athias, V Jeandel, C Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE) Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Collège de France (CdF (institution))-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA) GEOMAR LEGOS Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS) Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3) Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales Toulouse (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS) 2003-08 https://hal.archives-ouvertes.fr/hal-01463334 https://hal.archives-ouvertes.fr/hal-01463334/document https://hal.archives-ouvertes.fr/hal-01463334/file/1999JC000285.pdf https://doi.org/10.1029/1999JC000285 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/1999JC000285 hal-01463334 https://hal.archives-ouvertes.fr/hal-01463334 https://hal.archives-ouvertes.fr/hal-01463334/document https://hal.archives-ouvertes.fr/hal-01463334/file/1999JC000285.pdf doi:10.1029/1999JC000285 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.archives-ouvertes.fr/hal-01463334 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2003, 108 (C8), ⟨10.1029/1999JC000285⟩ [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/article Journal articles 2003 ftccsdartic https://doi.org/10.1029/1999JC000285 2021-11-27T23:56:31Z International audience The oceanic Nd budget is calculated using a steady state 10-box model and a compilation of field data. This is the first attempt to propose consistent estimates of the Nd fluxes entering the ocean, as well as indicating possible Nd sources and the proportion of Nd fluxes exchanged between dissolved and particulate fractions. With presently available Nd data the best estimates give a total Nd influx of 9 x 10(9) g/yr, which leads to an oceanic Nd residence time of 500 years. From modeling tests we suggest that the authigenic Nd scavenged by particulates is 100% remineralized in the deep ocean. The total exchanged Nd flux may be as high as 2 x 10(10) g/yr. The epsilon(Nd(0)) values of the influxes are -22, -11, +1, and -4 for the North Atlantic, surface Atlantic, North Pacific, and surface Indo-Pacific regions, respectively. Atmospheric and riverine Nd fluxes are insufficient to explain the magnitude and regional variability of calculated Nd influxes and epsilon(Nd(0)). We propose continental margins as an additional source supplying Nd to the ocean. Using the model calibrated for Nd, we examine the sensitivity of deep water epsilon(Nd(0)) to variations of Nd inputs to the ocean. Deep water Nd concentrations and epsilon(Nd(0)) vary with the changes in Nd influxes and their epsilon(Nd(0)). As Nd sources to the ocean may change during glacial/interglacial periods, the epsilon(Nd(0)) shifts recorded in ferromanganese nodules and crusts do not necessarily reflect changes in paleoceanic circulation. The effects of continental erosion should be considered in reconstructing patterns of ocean circulation using Nd isotopes. Article in Journal/Newspaper North Atlantic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Pacific Journal of Geophysical Research 108 C8 |