Changes in the intermediate water masses of the Mediterranean Sea during the last climatic cycle ‐ New constraints from neodymium isotopes in foraminifera
Variations in Mediterranean thermohaline circulation of the Quaternary are still not well constrained whereas they have been considered to have an influence on the Atlantic Meridional Overturning Circulation and on the oxygenation of waters in the deep basins of the Mediterranean Sea. εNd analyses h...
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Online Access: | https://doi.org/10.1029/2020PA004153 https://archimer.ifremer.fr/doc/00679/79129/81621.pdf https://archimer.ifremer.fr/doc/00679/79129/84864.docx |
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fttriple:oai:gotriple.eu:10670/1.6it9x8 2023-05-15T18:01:04+02:00 Changes in the intermediate water masses of the Mediterranean Sea during the last climatic cycle ‐ New constraints from neodymium isotopes in foraminifera Colin, Christophe Duhamel, Maxence Siani, Giuseppe Dubois‐dauphin, Quentin, Ducassou, Emmanuelle Liu, Zhifei Wu, Jiawang Revel, Marie Dapoigny, Arnaud Douville, Eric Taviani, Marco Montagna, Paolo https://doi.org/10.1029/2020PA004153 https://archimer.ifremer.fr/doc/00679/79129/81621.pdf https://archimer.ifremer.fr/doc/00679/79129/84864.docx en eng American Geophysical Union (AGU) doi:10.1029/2020PA004153 10670/1.6it9x8 https://archimer.ifremer.fr/doc/00679/79129/81621.pdf https://archimer.ifremer.fr/doc/00679/79129/84864.docx Archimer, archive institutionnelle de l'Ifremer Paleoceanography And Paleoclimatology (2572-4517) (American Geophysical Union (AGU)), 2021-04 , Vol. 36 , N. 4 , P. e2020PA004153 (28p.) geo envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ fttriple https://doi.org/10.1029/2020PA004153 2023-01-22T17:01:32Z Variations in Mediterranean thermohaline circulation of the Quaternary are still not well constrained whereas they have been considered to have an influence on the Atlantic Meridional Overturning Circulation and on the oxygenation of waters in the deep basins of the Mediterranean Sea. εNd analyses have been carried out on planktonic foraminifera of cores collected in the central Mediterranean Sea to constrain water mass exchange between the Eastern and Western Mediterranean Sea (EMS and WMS) during the last climatic cycle. εNd records from the WMS and EMS display similar higher values during warm substages of interglacial Marine Isotopic Stage (MIS) 1 and 5. This suggests an efficient connection between the two Mediterranean sub‐basins and the transfer of radiogenic waters to the Tyrrhenian Sea via the Levantine Intermediate Water (LIW). Conversely, during glacial MIS, εNd of the intermediate depth of the Tyrrhenian Sea are less radiogenic than the EMS, implying limited hydrological connection between sub‐basins during low sea‐level stands. Superimposed on these glacial‐interglacial variations, increased εNd occurred during Heinrich Stadial events. This suggests a reduction in the formation of unradiogenic WIW in the Gulf of Lions due to the input of relatively fresh surface Atlantic water to the WMS and/or the inflow of radiogenic glacial LIW and upper EMDW to the Tyrrhenian Sea as a result of an active EMS convection related to saltier and colder conditions. Such potential millennial‐scale pulses of LIW intrusion into the Tyrrhenian Sea may have lead to an enhanced Mediterranean Outflow Water intensity in the Gibraltar Strait. Text Planktonic foraminifera Unknown Paleoceanography and Paleoclimatology 36 4 |
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geo envir Colin, Christophe Duhamel, Maxence Siani, Giuseppe Dubois‐dauphin, Quentin, Ducassou, Emmanuelle Liu, Zhifei Wu, Jiawang Revel, Marie Dapoigny, Arnaud Douville, Eric Taviani, Marco Montagna, Paolo Changes in the intermediate water masses of the Mediterranean Sea during the last climatic cycle ‐ New constraints from neodymium isotopes in foraminifera |
topic_facet |
geo envir |
description |
Variations in Mediterranean thermohaline circulation of the Quaternary are still not well constrained whereas they have been considered to have an influence on the Atlantic Meridional Overturning Circulation and on the oxygenation of waters in the deep basins of the Mediterranean Sea. εNd analyses have been carried out on planktonic foraminifera of cores collected in the central Mediterranean Sea to constrain water mass exchange between the Eastern and Western Mediterranean Sea (EMS and WMS) during the last climatic cycle. εNd records from the WMS and EMS display similar higher values during warm substages of interglacial Marine Isotopic Stage (MIS) 1 and 5. This suggests an efficient connection between the two Mediterranean sub‐basins and the transfer of radiogenic waters to the Tyrrhenian Sea via the Levantine Intermediate Water (LIW). Conversely, during glacial MIS, εNd of the intermediate depth of the Tyrrhenian Sea are less radiogenic than the EMS, implying limited hydrological connection between sub‐basins during low sea‐level stands. Superimposed on these glacial‐interglacial variations, increased εNd occurred during Heinrich Stadial events. This suggests a reduction in the formation of unradiogenic WIW in the Gulf of Lions due to the input of relatively fresh surface Atlantic water to the WMS and/or the inflow of radiogenic glacial LIW and upper EMDW to the Tyrrhenian Sea as a result of an active EMS convection related to saltier and colder conditions. Such potential millennial‐scale pulses of LIW intrusion into the Tyrrhenian Sea may have lead to an enhanced Mediterranean Outflow Water intensity in the Gibraltar Strait. |
format |
Text |
author |
Colin, Christophe Duhamel, Maxence Siani, Giuseppe Dubois‐dauphin, Quentin, Ducassou, Emmanuelle Liu, Zhifei Wu, Jiawang Revel, Marie Dapoigny, Arnaud Douville, Eric Taviani, Marco Montagna, Paolo |
author_facet |
Colin, Christophe Duhamel, Maxence Siani, Giuseppe Dubois‐dauphin, Quentin, Ducassou, Emmanuelle Liu, Zhifei Wu, Jiawang Revel, Marie Dapoigny, Arnaud Douville, Eric Taviani, Marco Montagna, Paolo |
author_sort |
Colin, Christophe |
title |
Changes in the intermediate water masses of the Mediterranean Sea during the last climatic cycle ‐ New constraints from neodymium isotopes in foraminifera |
title_short |
Changes in the intermediate water masses of the Mediterranean Sea during the last climatic cycle ‐ New constraints from neodymium isotopes in foraminifera |
title_full |
Changes in the intermediate water masses of the Mediterranean Sea during the last climatic cycle ‐ New constraints from neodymium isotopes in foraminifera |
title_fullStr |
Changes in the intermediate water masses of the Mediterranean Sea during the last climatic cycle ‐ New constraints from neodymium isotopes in foraminifera |
title_full_unstemmed |
Changes in the intermediate water masses of the Mediterranean Sea during the last climatic cycle ‐ New constraints from neodymium isotopes in foraminifera |
title_sort |
changes in the intermediate water masses of the mediterranean sea during the last climatic cycle ‐ new constraints from neodymium isotopes in foraminifera |
publisher |
American Geophysical Union (AGU) |
url |
https://doi.org/10.1029/2020PA004153 https://archimer.ifremer.fr/doc/00679/79129/81621.pdf https://archimer.ifremer.fr/doc/00679/79129/84864.docx |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Archimer, archive institutionnelle de l'Ifremer Paleoceanography And Paleoclimatology (2572-4517) (American Geophysical Union (AGU)), 2021-04 , Vol. 36 , N. 4 , P. e2020PA004153 (28p.) |
op_relation |
doi:10.1029/2020PA004153 10670/1.6it9x8 https://archimer.ifremer.fr/doc/00679/79129/81621.pdf https://archimer.ifremer.fr/doc/00679/79129/84864.docx |
op_doi |
https://doi.org/10.1029/2020PA004153 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
36 |
container_issue |
4 |
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1766170391702667264 |