Global continental and marine detrital εNd: an updated compilation for use in understanding marine Nd cycling
Understanding the role of sediment-water interactions in the oceanic cycling of neodymium (Nd) isotopes is essential for its reliable use as a modern and palaeoceanographic tracer of ocean circulation. However, the exact processes that control Nd cycling in the ocean are poorly defined and require a...
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Online Access: | http://hdl.handle.net/10044/1/87776 https://doi.org/10.1016/j.chemgeo.2021.120119 |
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ftimperialcol:oai:spiral.imperial.ac.uk:10044/1/87776 2023-05-15T17:35:27+02:00 Global continental and marine detrital εNd: an updated compilation for use in understanding marine Nd cycling Robinson, S Ivanovic, R Van de Flierdt, T Blanchet, CL Tachikawa, K Martin, EE Cook (Falco), CP Williams, T Gregoire, L Plancherel, Y Jeandel, C Arsouze, T Natural Environment Research Council (NERC) 2021-02-03 http://hdl.handle.net/10044/1/87776 https://doi.org/10.1016/j.chemgeo.2021.120119 English eng Elsevier Chemical Geology 0009-2541 http://hdl.handle.net/10044/1/87776 doi:10.1016/j.chemgeo.2021.120119 NE/P019080/1 NE/M017826/2 NE/F016751/1 NE/J021636/1 NE/N001141/1 © 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) http://creativecommons.org/licenses/by/4.0/ CC-BY 20 1 Geochemistry & Geophysics 0402 Geochemistry 0403 Geology 0406 Physical Geography and Environmental Geoscience Journal Article 2021 ftimperialcol https://doi.org/10.1016/j.chemgeo.2021.120119 2021-04-22T22:39:22Z Understanding the role of sediment-water interactions in the oceanic cycling of neodymium (Nd) isotopes is essential for its reliable use as a modern and palaeoceanographic tracer of ocean circulation. However, the exact processes that control Nd cycling in the ocean are poorly defined and require an up-to-date knowledge of the sources, sinks and transformation of this tracer to and within the ocean (e.g. as per the GEOTRACES core mission). We propose a considerable improvement of Nd-source identification by providing an extensive and up-to-date compilation of published terrestrial and marine sedimentary Nd isotopic measurements. From this database, we construct high resolution, gridded, global maps that characterise the Nd-isotopic signature of the continental margins and seafloor sediment. Here, we present the database, interpolation methods, and final data products. Consistent with the previous studies that inform our compilation, our global results show unradiogenic detrital Nd isotopic values (εNd ≈ -20) in the North Atlantic, εNd values of ≈ -12 to -7 in the Indian and Southern Ocean, and radiogenic values (εNd ≈ -3 to +4) in the Pacific. The new, high-resolution interpolation is useful for improving conceptual knowledge of Nd sources and sinks and enables the application of isotope-enabled ocean models to understand targeted Nd behaviour in the oceans. Such applications may include: examining the strength and distribution of a possible benthic flux required to reconcile global Nd budgets, establishing the potential use of Nd isotopes as a kinematic tracer of ocean circulation, and a general quantification of the non-conservative sedimentary processes that may contribute to marine Nd cycling. Article in Journal/Newspaper North Atlantic Southern Ocean Imperial College London: Spiral Indian Pacific Southern Ocean Chemical Geology 567 120119 |
institution |
Open Polar |
collection |
Imperial College London: Spiral |
op_collection_id |
ftimperialcol |
language |
English |
topic |
Geochemistry & Geophysics 0402 Geochemistry 0403 Geology 0406 Physical Geography and Environmental Geoscience |
spellingShingle |
Geochemistry & Geophysics 0402 Geochemistry 0403 Geology 0406 Physical Geography and Environmental Geoscience Robinson, S Ivanovic, R Van de Flierdt, T Blanchet, CL Tachikawa, K Martin, EE Cook (Falco), CP Williams, T Gregoire, L Plancherel, Y Jeandel, C Arsouze, T Global continental and marine detrital εNd: an updated compilation for use in understanding marine Nd cycling |
topic_facet |
Geochemistry & Geophysics 0402 Geochemistry 0403 Geology 0406 Physical Geography and Environmental Geoscience |
description |
Understanding the role of sediment-water interactions in the oceanic cycling of neodymium (Nd) isotopes is essential for its reliable use as a modern and palaeoceanographic tracer of ocean circulation. However, the exact processes that control Nd cycling in the ocean are poorly defined and require an up-to-date knowledge of the sources, sinks and transformation of this tracer to and within the ocean (e.g. as per the GEOTRACES core mission). We propose a considerable improvement of Nd-source identification by providing an extensive and up-to-date compilation of published terrestrial and marine sedimentary Nd isotopic measurements. From this database, we construct high resolution, gridded, global maps that characterise the Nd-isotopic signature of the continental margins and seafloor sediment. Here, we present the database, interpolation methods, and final data products. Consistent with the previous studies that inform our compilation, our global results show unradiogenic detrital Nd isotopic values (εNd ≈ -20) in the North Atlantic, εNd values of ≈ -12 to -7 in the Indian and Southern Ocean, and radiogenic values (εNd ≈ -3 to +4) in the Pacific. The new, high-resolution interpolation is useful for improving conceptual knowledge of Nd sources and sinks and enables the application of isotope-enabled ocean models to understand targeted Nd behaviour in the oceans. Such applications may include: examining the strength and distribution of a possible benthic flux required to reconcile global Nd budgets, establishing the potential use of Nd isotopes as a kinematic tracer of ocean circulation, and a general quantification of the non-conservative sedimentary processes that may contribute to marine Nd cycling. |
author2 |
Natural Environment Research Council (NERC) |
format |
Article in Journal/Newspaper |
author |
Robinson, S Ivanovic, R Van de Flierdt, T Blanchet, CL Tachikawa, K Martin, EE Cook (Falco), CP Williams, T Gregoire, L Plancherel, Y Jeandel, C Arsouze, T |
author_facet |
Robinson, S Ivanovic, R Van de Flierdt, T Blanchet, CL Tachikawa, K Martin, EE Cook (Falco), CP Williams, T Gregoire, L Plancherel, Y Jeandel, C Arsouze, T |
author_sort |
Robinson, S |
title |
Global continental and marine detrital εNd: an updated compilation for use in understanding marine Nd cycling |
title_short |
Global continental and marine detrital εNd: an updated compilation for use in understanding marine Nd cycling |
title_full |
Global continental and marine detrital εNd: an updated compilation for use in understanding marine Nd cycling |
title_fullStr |
Global continental and marine detrital εNd: an updated compilation for use in understanding marine Nd cycling |
title_full_unstemmed |
Global continental and marine detrital εNd: an updated compilation for use in understanding marine Nd cycling |
title_sort |
global continental and marine detrital εnd: an updated compilation for use in understanding marine nd cycling |
publisher |
Elsevier |
publishDate |
2021 |
url |
http://hdl.handle.net/10044/1/87776 https://doi.org/10.1016/j.chemgeo.2021.120119 |
geographic |
Indian Pacific Southern Ocean |
geographic_facet |
Indian Pacific Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
20 1 |
op_relation |
Chemical Geology 0009-2541 http://hdl.handle.net/10044/1/87776 doi:10.1016/j.chemgeo.2021.120119 NE/P019080/1 NE/M017826/2 NE/F016751/1 NE/J021636/1 NE/N001141/1 |
op_rights |
© 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.chemgeo.2021.120119 |
container_title |
Chemical Geology |
container_volume |
567 |
container_start_page |
120119 |
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1766134628131799040 |