Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5
ABSTRACT Sediment core PS1904 reveals continuous records of planktic and benthic foraminiferal stable isotopes (δ 18 O/δ 13 C) 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...
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crwiley:10.1002/jqs.3060 2023-10-29T02:29:51+01:00 Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5 Telesiński, Maciej M. Bauch, Henning A. Spielhagen, Robert F. The German Federal Ministry for Education and Science (BMBF) The German-Russian collaborative project ‘Transdrift’ 2018 http://dx.doi.org/10.1002/jqs.3060 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.3060 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3060 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 33, issue 7, page 794-803 ISSN 0267-8179 1099-1417 Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) journal-article 2018 crwiley https://doi.org/10.1002/jqs.3060 2023-10-02T17:06:00Z ABSTRACT Sediment core PS1904 reveals continuous records of planktic and benthic foraminiferal stable isotopes (δ 18 O/δ 13 C) 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 δ 18 O 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 Ocean Foraminifera* Greenland Ice Sheet Kara Sea Nordic Seas Sea ice Siberia Wiley Online Library (via Crossref) Journal of Quaternary Science 33 7 794 803 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) |
spellingShingle |
Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) Telesiński, 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 |
topic_facet |
Paleontology Earth and Planetary Sciences (miscellaneous) Arts and Humanities (miscellaneous) |
description |
ABSTRACT Sediment core PS1904 reveals continuous records of planktic and benthic foraminiferal stable isotopes (δ 18 O/δ 13 C) 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 δ 18 O 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. |
author2 |
The German Federal Ministry for Education and Science (BMBF) The German-Russian collaborative project ‘Transdrift’ |
format |
Article in Journal/Newspaper |
author |
Telesiński, Maciej M. Bauch, Henning A. Spielhagen, Robert F. |
author_facet |
Telesiński, Maciej M. Bauch, Henning A. Spielhagen, Robert F. |
author_sort |
Telesiński, 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 |
publishDate |
2018 |
url |
http://dx.doi.org/10.1002/jqs.3060 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.3060 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3060 |
genre |
albedo Arctic Arctic Ocean Foraminifera* Greenland Ice Sheet Kara Sea Nordic Seas Sea ice Siberia |
genre_facet |
albedo Arctic Arctic Ocean Foraminifera* Greenland Ice Sheet Kara Sea Nordic Seas Sea ice Siberia |
op_source |
Journal of Quaternary Science volume 33, issue 7, page 794-803 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
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 |
_version_ |
1781069973858287616 |