Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes
Sediment core MSM5/5-712 from the West Spitsbergen continental margin has been investigated at high resolution for its seawater-derived neodymium (Nd) and lead (Pb) isotope compositions stored in ferromanganese oxyhydroxide coatings of the sediment particles to reconstruct Holocene changes in the so...
Published in: | Quaternary Science Reviews |
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Language: | English |
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Elsevier
2014
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Online Access: | https://oceanrep.geomar.de/id/eprint/21615/ https://oceanrep.geomar.de/id/eprint/21615/1/Werner.pdf https://doi.org/10.1016/j.quascirev.2013.06.015 |
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ftoceanrep:oai:oceanrep.geomar.de:21615 2023-05-15T15:03:50+02:00 Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes Werner, Kirstin Frank, Martin Teschner, Claudia Müller, Juliane Spielhagen, Robert F. 2014-05-15 text https://oceanrep.geomar.de/id/eprint/21615/ https://oceanrep.geomar.de/id/eprint/21615/1/Werner.pdf https://doi.org/10.1016/j.quascirev.2013.06.015 en eng Elsevier https://oceanrep.geomar.de/id/eprint/21615/1/Werner.pdf Werner, K., Frank, M. , Teschner, C., Müller, J. and Spielhagen, R. F. (2014) Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes. Quaternary Science Reviews, 92 . pp. 190-207. DOI 10.1016/j.quascirev.2013.06.015 <https://doi.org/10.1016/j.quascirev.2013.06.015>. doi:10.1016/j.quascirev.2013.06.015 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2014 ftoceanrep https://doi.org/10.1016/j.quascirev.2013.06.015 2023-04-07T15:09:49Z Sediment core MSM5/5-712 from the West Spitsbergen continental margin has been investigated at high resolution for its seawater-derived neodymium (Nd) and lead (Pb) isotope compositions stored in ferromanganese oxyhydroxide coatings of the sediment particles to reconstruct Holocene changes in the sources and mixing of bottom waters passing the site. The radiogenic isotope data are used in combination with a multitude of proxy indicators for the climatic and oceanographic development of the eastern Fram Strait during the past 8500 years. To calibrate the downcore data, seawater and core top samples from the area were analysed for their radiogenic isotope compositions. Core top leachates reveal relatively high (more radiogenic) Nd isotope compositions between εNd −9.7 and −9.1, which are higher than present-day seawater εNd in eastern Fram Strait (−12.6 to −10.5) and indicate that the seawater values have only been established very recently. The core top data agree well with the downcore signatures within the uppermost 40 cm of the sediment core (εNd −9.1 to −8.8) indicating a reduced inflow of waters from the Nordic Seas, concurrent with cool conditions and a south-eastward shift of the marginal ice zone after ca 2.8 cal ka BP (Late Holocene). High sea-ice abundances in eastern Fram Strait are coeval with the well-known Neoglacial trend in the northern North Atlantic region. In contrast, warmer conditions of the late Early to Mid-Holocene were accompanied by lower (less radiogenic) εNd signatures of the bottom waters indicating an increased admixture from the Nordic Seas (−10.6 to −10.1). A shift to significantly more radiogenic εNd signatures of the detrital material also occurred at 3 cal ka BP and was accompanied by a marked increase in supply of fine-grained ice-rafted material (IRF) from the Arctic Ocean to the core site. The most likely source areas for this radiogenic material are the shallow Arctic shelves, in particular the Kara Sea shelf. The evolution of the Pb isotope compositions of past seawater was ... Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Kara Sea Nordic Seas North Atlantic Sea ice Spitsbergen OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Kara Sea Quaternary Science Reviews 92 190 207 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Sediment core MSM5/5-712 from the West Spitsbergen continental margin has been investigated at high resolution for its seawater-derived neodymium (Nd) and lead (Pb) isotope compositions stored in ferromanganese oxyhydroxide coatings of the sediment particles to reconstruct Holocene changes in the sources and mixing of bottom waters passing the site. The radiogenic isotope data are used in combination with a multitude of proxy indicators for the climatic and oceanographic development of the eastern Fram Strait during the past 8500 years. To calibrate the downcore data, seawater and core top samples from the area were analysed for their radiogenic isotope compositions. Core top leachates reveal relatively high (more radiogenic) Nd isotope compositions between εNd −9.7 and −9.1, which are higher than present-day seawater εNd in eastern Fram Strait (−12.6 to −10.5) and indicate that the seawater values have only been established very recently. The core top data agree well with the downcore signatures within the uppermost 40 cm of the sediment core (εNd −9.1 to −8.8) indicating a reduced inflow of waters from the Nordic Seas, concurrent with cool conditions and a south-eastward shift of the marginal ice zone after ca 2.8 cal ka BP (Late Holocene). High sea-ice abundances in eastern Fram Strait are coeval with the well-known Neoglacial trend in the northern North Atlantic region. In contrast, warmer conditions of the late Early to Mid-Holocene were accompanied by lower (less radiogenic) εNd signatures of the bottom waters indicating an increased admixture from the Nordic Seas (−10.6 to −10.1). A shift to significantly more radiogenic εNd signatures of the detrital material also occurred at 3 cal ka BP and was accompanied by a marked increase in supply of fine-grained ice-rafted material (IRF) from the Arctic Ocean to the core site. The most likely source areas for this radiogenic material are the shallow Arctic shelves, in particular the Kara Sea shelf. The evolution of the Pb isotope compositions of past seawater was ... |
format |
Article in Journal/Newspaper |
author |
Werner, Kirstin Frank, Martin Teschner, Claudia Müller, Juliane Spielhagen, Robert F. |
spellingShingle |
Werner, Kirstin Frank, Martin Teschner, Claudia Müller, Juliane Spielhagen, Robert F. Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes |
author_facet |
Werner, Kirstin Frank, Martin Teschner, Claudia Müller, Juliane Spielhagen, Robert F. |
author_sort |
Werner, Kirstin |
title |
Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes |
title_short |
Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes |
title_full |
Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes |
title_fullStr |
Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes |
title_full_unstemmed |
Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes |
title_sort |
neoglacial change in deep water exchange and increase of sea-ice transport through eastern fram strait: evidence from radiogenic isotopes |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://oceanrep.geomar.de/id/eprint/21615/ https://oceanrep.geomar.de/id/eprint/21615/1/Werner.pdf https://doi.org/10.1016/j.quascirev.2013.06.015 |
geographic |
Arctic Arctic Ocean Kara Sea |
geographic_facet |
Arctic Arctic Ocean Kara Sea |
genre |
Arctic Arctic Ocean Fram Strait Kara Sea Nordic Seas North Atlantic Sea ice Spitsbergen |
genre_facet |
Arctic Arctic Ocean Fram Strait Kara Sea Nordic Seas North Atlantic Sea ice Spitsbergen |
op_relation |
https://oceanrep.geomar.de/id/eprint/21615/1/Werner.pdf Werner, K., Frank, M. , Teschner, C., Müller, J. and Spielhagen, R. F. (2014) Neoglacial change in deep water exchange and increase of sea-ice transport through eastern Fram Strait: evidence from radiogenic isotopes. Quaternary Science Reviews, 92 . pp. 190-207. DOI 10.1016/j.quascirev.2013.06.015 <https://doi.org/10.1016/j.quascirev.2013.06.015>. doi:10.1016/j.quascirev.2013.06.015 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2013.06.015 |
container_title |
Quaternary Science Reviews |
container_volume |
92 |
container_start_page |
190 |
op_container_end_page |
207 |
_version_ |
1766335682516615168 |