Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals
© The Author(s), 2017. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Climate of the Past 13 (2017): 17-37, doi:10.5194/cp-13-17-2017. We present the neodymium isotopic composition (εNd) of mixed planktonic foraminifer...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications on behalf of the European Geosciences Union
2017
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/8807 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/8807 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/8807 2023-05-15T17:08:49+02:00 Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals Dubois-Dauphin, Quentin Montagna, Paolo Siani, Giuseppe Douville, Eric Wienberg, Claudia Hebbeln, Dierk Liu, Zhifei Kallel, Nejib Dapoigny, Arnaud Revel, Marie Pons-Branchu, Edwige Taviani, Marco Colin, Christophe 2017-01-10 https://hdl.handle.net/1912/8807 en eng Copernicus Publications on behalf of the European Geosciences Union https://doi.org/10.5194/cp-13-17-2017 Climate of the Past 13 (2017): 17-37 https://hdl.handle.net/1912/8807 doi:10.5194/cp-13-17-2017 Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/ CC-BY Climate of the Past 13 (2017): 17-37 doi:10.5194/cp-13-17-2017 Article 2017 ftwhoas https://doi.org/10.5194/cp-13-17-2017 2022-05-28T22:59:50Z © The Author(s), 2017. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Climate of the Past 13 (2017): 17-37, doi:10.5194/cp-13-17-2017. We present the neodymium isotopic composition (εNd) of mixed planktonic foraminifera species from a sediment core collected at 622 m water depth in the Balearic Sea, as well as εNd of scleractinian cold-water corals (CWC; Madrepora oculata, Lophelia pertusa) retrieved between 280 and 442 m water depth in the Alboran Sea and at 414 m depth in the southern Sardinian continental margin. The aim is to constrain hydrological variations at intermediate depths in the western Mediterranean Sea during the last 20 kyr. Planktonic (Globigerina bulloides) and benthic (Cibicidoides pachyderma) foraminifera from the Balearic Sea were also analyzed for stable oxygen (δ18O) and carbon (δ13C) isotopes. The foraminiferal and coral εNd values from the Balearic and Alboran seas are comparable over the last ∼ 13 kyr, with mean values of −8.94 ± 0.26 (1σ; n = 24) and −8.91 ± 0.18 (1σ; n = 25), respectively. Before 13 ka BP, the foraminiferal εNd values are slightly lower (−9.28 ± 0.15) and tend to reflect higher mixing between intermediate and deep waters, which are characterized by more unradiogenic εNd values. The slight εNd increase after 13 ka BP is associated with a decoupling in the benthic foraminiferal δ13C composition between intermediate and deeper depths, which started at ∼ 16 ka BP. This suggests an earlier stratification of the water masses and a subsequent reduced contribution of unradiogenic εNd from deep waters. The CWC from the Sardinia Channel show a much larger scatter of εNd values, from −8.66 ± 0.30 to −5.99 ± 0.50, and a lower average (−7.31 ± 0.73; n = 19) compared to the CWC and foraminifera from the Alboran and Balearic seas, indicative of intermediate waters sourced from the Levantine basin. At the time of sapropel S1 deposition (10.2 to 6.4 ka), the εNd values of the Sardinian CWC become more ... Article in Journal/Newspaper Lophelia pertusa Planktonic foraminifera Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Climate of the Past 13 1 17 37 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
description |
© The Author(s), 2017. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Climate of the Past 13 (2017): 17-37, doi:10.5194/cp-13-17-2017. We present the neodymium isotopic composition (εNd) of mixed planktonic foraminifera species from a sediment core collected at 622 m water depth in the Balearic Sea, as well as εNd of scleractinian cold-water corals (CWC; Madrepora oculata, Lophelia pertusa) retrieved between 280 and 442 m water depth in the Alboran Sea and at 414 m depth in the southern Sardinian continental margin. The aim is to constrain hydrological variations at intermediate depths in the western Mediterranean Sea during the last 20 kyr. Planktonic (Globigerina bulloides) and benthic (Cibicidoides pachyderma) foraminifera from the Balearic Sea were also analyzed for stable oxygen (δ18O) and carbon (δ13C) isotopes. The foraminiferal and coral εNd values from the Balearic and Alboran seas are comparable over the last ∼ 13 kyr, with mean values of −8.94 ± 0.26 (1σ; n = 24) and −8.91 ± 0.18 (1σ; n = 25), respectively. Before 13 ka BP, the foraminiferal εNd values are slightly lower (−9.28 ± 0.15) and tend to reflect higher mixing between intermediate and deep waters, which are characterized by more unradiogenic εNd values. The slight εNd increase after 13 ka BP is associated with a decoupling in the benthic foraminiferal δ13C composition between intermediate and deeper depths, which started at ∼ 16 ka BP. This suggests an earlier stratification of the water masses and a subsequent reduced contribution of unradiogenic εNd from deep waters. The CWC from the Sardinia Channel show a much larger scatter of εNd values, from −8.66 ± 0.30 to −5.99 ± 0.50, and a lower average (−7.31 ± 0.73; n = 19) compared to the CWC and foraminifera from the Alboran and Balearic seas, indicative of intermediate waters sourced from the Levantine basin. At the time of sapropel S1 deposition (10.2 to 6.4 ka), the εNd values of the Sardinian CWC become more ... |
format |
Article in Journal/Newspaper |
author |
Dubois-Dauphin, Quentin Montagna, Paolo Siani, Giuseppe Douville, Eric Wienberg, Claudia Hebbeln, Dierk Liu, Zhifei Kallel, Nejib Dapoigny, Arnaud Revel, Marie Pons-Branchu, Edwige Taviani, Marco Colin, Christophe |
spellingShingle |
Dubois-Dauphin, Quentin Montagna, Paolo Siani, Giuseppe Douville, Eric Wienberg, Claudia Hebbeln, Dierk Liu, Zhifei Kallel, Nejib Dapoigny, Arnaud Revel, Marie Pons-Branchu, Edwige Taviani, Marco Colin, Christophe Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals |
author_facet |
Dubois-Dauphin, Quentin Montagna, Paolo Siani, Giuseppe Douville, Eric Wienberg, Claudia Hebbeln, Dierk Liu, Zhifei Kallel, Nejib Dapoigny, Arnaud Revel, Marie Pons-Branchu, Edwige Taviani, Marco Colin, Christophe |
author_sort |
Dubois-Dauphin, Quentin |
title |
Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals |
title_short |
Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals |
title_full |
Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals |
title_fullStr |
Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals |
title_full_unstemmed |
Hydrological variations of the intermediate water masses of the western Mediterranean Sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals |
title_sort |
hydrological variations of the intermediate water masses of the western mediterranean sea during the past 20 ka inferred from neodymium isotopic composition in foraminifera and cold-water corals |
publisher |
Copernicus Publications on behalf of the European Geosciences Union |
publishDate |
2017 |
url |
https://hdl.handle.net/1912/8807 |
genre |
Lophelia pertusa Planktonic foraminifera |
genre_facet |
Lophelia pertusa Planktonic foraminifera |
op_source |
Climate of the Past 13 (2017): 17-37 doi:10.5194/cp-13-17-2017 |
op_relation |
https://doi.org/10.5194/cp-13-17-2017 Climate of the Past 13 (2017): 17-37 https://hdl.handle.net/1912/8807 doi:10.5194/cp-13-17-2017 |
op_rights |
Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-13-17-2017 |
container_title |
Climate of the Past |
container_volume |
13 |
container_issue |
1 |
container_start_page |
17 |
op_container_end_page |
37 |
_version_ |
1766064690041978880 |