Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5
Sediment core PS1904 reveals continuous records of planktic and benthic foraminiferal stable isotopes (δ18O/δ13C) from the north-eastern Greenland continental margin. The data show good comparability with other records from the Nordic Seas, allowing the stratigraphic range of PS1904 to be dated to M...
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Online Access: | https://oceanrep.geomar.de/id/eprint/44179/ https://oceanrep.geomar.de/id/eprint/44179/7/Telesinski.pdf https://doi.org/10.1002/jqs.3060 |
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ftoceanrep:oai:oceanrep.geomar.de:44179 2023-05-15T13:11:33+02:00 Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5 Telesinski, Maciej M. Bauch, Henning A. Spielhagen, Robert F. 2018-10 text https://oceanrep.geomar.de/id/eprint/44179/ https://oceanrep.geomar.de/id/eprint/44179/7/Telesinski.pdf https://doi.org/10.1002/jqs.3060 en eng Wiley-Blackwell https://oceanrep.geomar.de/id/eprint/44179/7/Telesinski.pdf Telesinski, M. M., Bauch, H. A. and Spielhagen, R. F. (2018) Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5. Journal of Quaternary Science, 33 (7). pp. 794-803. DOI 10.1002/jqs.3060 <https://doi.org/10.1002/jqs.3060>. doi:10.1002/jqs.3060 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.1002/jqs.3060 2023-04-07T15:41:11Z Sediment core PS1904 reveals continuous records of planktic and benthic foraminiferal stable isotopes (δ18O/δ13C) from the north-eastern Greenland continental margin. The data show good comparability with other records from the Nordic Seas, allowing the stratigraphic range of PS1904 to be dated to Marine Isotope Stage (MIS) 6. Focusing on MIS 5 reveals light δ18O values during MIS 5a compared to the last interglacial peak (MIS 5e) which indicates that surface and bottom water layers were strongly affected by freshwater during the former event. We present two possible scenarios explaining the origin and routing of the freshwater: (i) drainage of a Eurasian proglacial lake coupled with the collapse of the Kara Sea Ice Sheet at the MIS 5b/a boundary, and (ii) destabilization and melting of the nearby Greenland Ice Sheet. Although both scenarios could have acted simultaneously, sediment records from the Eurasian sector of the Arctic Ocean hint at the proglacial lake system in north-western Siberia as the largest freshwater source. Regardless of the actual source, the freshwater lowered the surface ocean salinity causing water column stratification and sea ice expansion. Increased sea-ice abundance led to a higher albedo and probably contributed to the cooling and global ice sheet growth that occurred subsequently during MIS 4. Article in Journal/Newspaper albedo Arctic Arctic Arctic Ocean Foraminifera* Greenland Ice Sheet Kara Sea Nordic Seas Sea ice Siberia OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Arctic Ocean Greenland Kara Sea Journal of Quaternary Science 33 7 794 803 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Sediment core PS1904 reveals continuous records of planktic and benthic foraminiferal stable isotopes (δ18O/δ13C) from the north-eastern Greenland continental margin. The data show good comparability with other records from the Nordic Seas, allowing the stratigraphic range of PS1904 to be dated to Marine Isotope Stage (MIS) 6. Focusing on MIS 5 reveals light δ18O values during MIS 5a compared to the last interglacial peak (MIS 5e) which indicates that surface and bottom water layers were strongly affected by freshwater during the former event. We present two possible scenarios explaining the origin and routing of the freshwater: (i) drainage of a Eurasian proglacial lake coupled with the collapse of the Kara Sea Ice Sheet at the MIS 5b/a boundary, and (ii) destabilization and melting of the nearby Greenland Ice Sheet. Although both scenarios could have acted simultaneously, sediment records from the Eurasian sector of the Arctic Ocean hint at the proglacial lake system in north-western Siberia as the largest freshwater source. Regardless of the actual source, the freshwater lowered the surface ocean salinity causing water column stratification and sea ice expansion. Increased sea-ice abundance led to a higher albedo and probably contributed to the cooling and global ice sheet growth that occurred subsequently during MIS 4. |
format |
Article in Journal/Newspaper |
author |
Telesinski, Maciej M. Bauch, Henning A. Spielhagen, Robert F. |
spellingShingle |
Telesinski, Maciej M. Bauch, Henning A. Spielhagen, Robert F. Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5 |
author_facet |
Telesinski, Maciej M. Bauch, Henning A. Spielhagen, Robert F. |
author_sort |
Telesinski, Maciej M. |
title |
Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5 |
title_short |
Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5 |
title_full |
Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5 |
title_fullStr |
Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5 |
title_full_unstemmed |
Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5 |
title_sort |
causes and consequences of arctic freshwater routing into the nordic seas during late marine isotope stage 5 |
publisher |
Wiley-Blackwell |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/44179/ https://oceanrep.geomar.de/id/eprint/44179/7/Telesinski.pdf https://doi.org/10.1002/jqs.3060 |
geographic |
Arctic Arctic Ocean Greenland Kara Sea |
geographic_facet |
Arctic Arctic Ocean Greenland Kara Sea |
genre |
albedo Arctic Arctic Arctic Ocean Foraminifera* Greenland Ice Sheet Kara Sea Nordic Seas Sea ice Siberia |
genre_facet |
albedo Arctic Arctic Arctic Ocean Foraminifera* Greenland Ice Sheet Kara Sea Nordic Seas Sea ice Siberia |
op_relation |
https://oceanrep.geomar.de/id/eprint/44179/7/Telesinski.pdf Telesinski, M. M., Bauch, H. A. and Spielhagen, R. F. (2018) Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5. Journal of Quaternary Science, 33 (7). pp. 794-803. DOI 10.1002/jqs.3060 <https://doi.org/10.1002/jqs.3060>. doi:10.1002/jqs.3060 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/jqs.3060 |
container_title |
Journal of Quaternary Science |
container_volume |
33 |
container_issue |
7 |
container_start_page |
794 |
op_container_end_page |
803 |
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1766247965096148992 |