Nd isotopic composition of water masses and dilution of the Mediterranean outflow along the southwest European margin
Nd isotopic compositions (epsilon Nd) of seawater profiles and deep-sea corals collected off the coast of Iberia and from the Bay of Biscay were measured (1) to constrain the Nd isotopic composition of water masses along the southwest European margin, (2) to track the Mediterranean Outflow Water (MO...
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American Geophysical Union
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Online Access: | https://archimer.ifremer.fr/doc/00040/15108/12571.pdf https://doi.org/10.1029/2011GC003529 https://archimer.ifremer.fr/doc/00040/15108/ |
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ftarchimer:oai:archimer.ifremer.fr:15108 2023-05-15T17:06:07+02:00 Nd isotopic composition of water masses and dilution of the Mediterranean outflow along the southwest European margin Copard, K. Colin, C. Frank, N. Jeandel, C. Montero-serrano, J-c Reverdin, G. Ferron, Bruno 2011-06 application/pdf https://archimer.ifremer.fr/doc/00040/15108/12571.pdf https://doi.org/10.1029/2011GC003529 https://archimer.ifremer.fr/doc/00040/15108/ eng eng American Geophysical Union https://archimer.ifremer.fr/doc/00040/15108/12571.pdf doi:10.1029/2011GC003529 https://archimer.ifremer.fr/doc/00040/15108/ 2011 by the American Geophysical Union info:eu-repo/semantics/openAccess restricted use Geochemistry Geophysics Geosystems - G3 (1525-2027) (American Geophysical Union), 2011-06 , Vol. 12 , N. Q06020 , P. 14 p. European margin Nd isotopic composition deep‐sea corals water masses text Publication info:eu-repo/semantics/article 2011 ftarchimer https://doi.org/10.1029/2011GC003529 2021-09-23T20:19:33Z Nd isotopic compositions (epsilon Nd) of seawater profiles and deep-sea corals collected off the coast of Iberia and from the Bay of Biscay were measured (1) to constrain the Nd isotopic composition of water masses along the southwest European margin, (2) to track the Mediterranean Outflow Water (MOW) during its northward propagation, and (3) to establish hydrological changes during the last 1500 years. The Eastern North Atlantic Central Water (ENACW) is characterized by Nd isotopic composition of around -12.0. Mediterranean Sea Water (MSW) is collected from 800 and 1200 m depth and is characterized by epsilon Nd values ranging from -10.9, off the coast of Iberia, to -11.6 in the Bay of Biscay. These epsilon Nd results suggest a strong dilution of the pure MOW at the Strait of Gibraltar (epsilon Nd -9.4) of approximately 40% and 30% along its northward circulation pathway essentially with a contribution from ENACW. At around 2000 m depth, epsilon Nd water profiles display the occurrence of a nonradiogenic water mass (epsilon Nd -13), originating from the Labrador Sea (Labrador Sea Water). Fossil deep-sea corals, dated between 84 and 1500 years, display Nd isotopic compositions that vary moderately from present-day seawater values, suggesting a weaker influence of MOW in the formation of MSW during the Dark Ages and the Little Ice Age. These recent cold events seem to be associated with a reduction in the northward penetration of MSW, which may result from a greater eastward extension of the middepth subpolar gyre and/or a reduction of MSW formation, likely tied to a variation in deep Mediterranean water production. Article in Journal/Newspaper Labrador Sea North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Geochemistry, Geophysics, Geosystems 12 6 n/a n/a |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
European margin Nd isotopic composition deep‐sea corals water masses |
spellingShingle |
European margin Nd isotopic composition deep‐sea corals water masses Copard, K. Colin, C. Frank, N. Jeandel, C. Montero-serrano, J-c Reverdin, G. Ferron, Bruno Nd isotopic composition of water masses and dilution of the Mediterranean outflow along the southwest European margin |
topic_facet |
European margin Nd isotopic composition deep‐sea corals water masses |
description |
Nd isotopic compositions (epsilon Nd) of seawater profiles and deep-sea corals collected off the coast of Iberia and from the Bay of Biscay were measured (1) to constrain the Nd isotopic composition of water masses along the southwest European margin, (2) to track the Mediterranean Outflow Water (MOW) during its northward propagation, and (3) to establish hydrological changes during the last 1500 years. The Eastern North Atlantic Central Water (ENACW) is characterized by Nd isotopic composition of around -12.0. Mediterranean Sea Water (MSW) is collected from 800 and 1200 m depth and is characterized by epsilon Nd values ranging from -10.9, off the coast of Iberia, to -11.6 in the Bay of Biscay. These epsilon Nd results suggest a strong dilution of the pure MOW at the Strait of Gibraltar (epsilon Nd -9.4) of approximately 40% and 30% along its northward circulation pathway essentially with a contribution from ENACW. At around 2000 m depth, epsilon Nd water profiles display the occurrence of a nonradiogenic water mass (epsilon Nd -13), originating from the Labrador Sea (Labrador Sea Water). Fossil deep-sea corals, dated between 84 and 1500 years, display Nd isotopic compositions that vary moderately from present-day seawater values, suggesting a weaker influence of MOW in the formation of MSW during the Dark Ages and the Little Ice Age. These recent cold events seem to be associated with a reduction in the northward penetration of MSW, which may result from a greater eastward extension of the middepth subpolar gyre and/or a reduction of MSW formation, likely tied to a variation in deep Mediterranean water production. |
format |
Article in Journal/Newspaper |
author |
Copard, K. Colin, C. Frank, N. Jeandel, C. Montero-serrano, J-c Reverdin, G. Ferron, Bruno |
author_facet |
Copard, K. Colin, C. Frank, N. Jeandel, C. Montero-serrano, J-c Reverdin, G. Ferron, Bruno |
author_sort |
Copard, K. |
title |
Nd isotopic composition of water masses and dilution of the Mediterranean outflow along the southwest European margin |
title_short |
Nd isotopic composition of water masses and dilution of the Mediterranean outflow along the southwest European margin |
title_full |
Nd isotopic composition of water masses and dilution of the Mediterranean outflow along the southwest European margin |
title_fullStr |
Nd isotopic composition of water masses and dilution of the Mediterranean outflow along the southwest European margin |
title_full_unstemmed |
Nd isotopic composition of water masses and dilution of the Mediterranean outflow along the southwest European margin |
title_sort |
nd isotopic composition of water masses and dilution of the mediterranean outflow along the southwest european margin |
publisher |
American Geophysical Union |
publishDate |
2011 |
url |
https://archimer.ifremer.fr/doc/00040/15108/12571.pdf https://doi.org/10.1029/2011GC003529 https://archimer.ifremer.fr/doc/00040/15108/ |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_source |
Geochemistry Geophysics Geosystems - G3 (1525-2027) (American Geophysical Union), 2011-06 , Vol. 12 , N. Q06020 , P. 14 p. |
op_relation |
https://archimer.ifremer.fr/doc/00040/15108/12571.pdf doi:10.1029/2011GC003529 https://archimer.ifremer.fr/doc/00040/15108/ |
op_rights |
2011 by the American Geophysical Union info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2011GC003529 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
12 |
container_issue |
6 |
container_start_page |
n/a |
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n/a |
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1766061106342658048 |