Abrupt drainage cycles of the Fennoscandian Ice Sheet
Continental ice sheets are a key component of the Earth’s climate system, but their internal dynamics need to be further studied. Since the last deglaciation, the northern Eurasian Fennoscandian Ice Sheet (FIS) has been connected to the Black Sea (BS) watershed, making this basin a suitable location...
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ftarchimer:oai:archimer.ifremer.fr:24489 2023-05-15T16:12:52+02:00 Abrupt drainage cycles of the Fennoscandian Ice Sheet Soulet, Guillaume Menot, Guillemette Bayon, Germain Rostek, Frauke Ponzevera, Emmanuel Toucanne, Samuel Lericolais, Gilles Bard, Edouard 2013-04 application/pdf https://archimer.ifremer.fr/doc/00134/24489/22515.pdf https://archimer.ifremer.fr/doc/00134/24489/22516.pdf https://doi.org/10.1073/pnas.1214676110 https://archimer.ifremer.fr/doc/00134/24489/ eng eng Natl Acad Sciences https://archimer.ifremer.fr/doc/00134/24489/22515.pdf https://archimer.ifremer.fr/doc/00134/24489/22516.pdf doi:10.1073/pnas.1214676110 https://archimer.ifremer.fr/doc/00134/24489/ © 2013 National Academy of Sciences info:eu-repo/semantics/openAccess restricted use Proceedings Of The National Academy Of Sciences Of The United States Of America (0027-8424) (Natl Acad Sciences), 2013-04 , Vol. 110 , N. 17 , P. 6682-6687 ice dynamics meltwater routing European hydrographic network text Publication info:eu-repo/semantics/article 2013 ftarchimer https://doi.org/10.1073/pnas.1214676110 2021-09-23T20:22:52Z Continental ice sheets are a key component of the Earth’s climate system, but their internal dynamics need to be further studied. Since the last deglaciation, the northern Eurasian Fennoscandian Ice Sheet (FIS) has been connected to the Black Sea (BS) watershed, making this basin a suitable location to investigate former ice-sheet dynamics. Here, from a core retrieved in the BS, we combine the use of neodymium isotopes, high-resolution elemental analysis, and biomarkers to trace changes in sediment provenance and river runoff. We reveal cyclic releases of meltwater originating from Lake Disna, a proglacial lake linked to the FIS during Heinrich Stadial 1. Regional interactions within the climate–lake–FIS system, linked to changes in the availability of subglacial water, led to abrupt drainage cycles of the FIS into the BS watershed. This phenomenon raised the BS water level by ∼100 m until the sill of the Bosphorus Strait was reached, flooding the vast northwestern BS shelf and deeply affecting the hydrology and circulation of the BS and, probably, of the Marmara and Aegean Seas. Article in Journal/Newspaper Fennoscandian Ice Sheet Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Proceedings of the National Academy of Sciences 110 17 6682 6687 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
ice dynamics meltwater routing European hydrographic network |
spellingShingle |
ice dynamics meltwater routing European hydrographic network Soulet, Guillaume Menot, Guillemette Bayon, Germain Rostek, Frauke Ponzevera, Emmanuel Toucanne, Samuel Lericolais, Gilles Bard, Edouard Abrupt drainage cycles of the Fennoscandian Ice Sheet |
topic_facet |
ice dynamics meltwater routing European hydrographic network |
description |
Continental ice sheets are a key component of the Earth’s climate system, but their internal dynamics need to be further studied. Since the last deglaciation, the northern Eurasian Fennoscandian Ice Sheet (FIS) has been connected to the Black Sea (BS) watershed, making this basin a suitable location to investigate former ice-sheet dynamics. Here, from a core retrieved in the BS, we combine the use of neodymium isotopes, high-resolution elemental analysis, and biomarkers to trace changes in sediment provenance and river runoff. We reveal cyclic releases of meltwater originating from Lake Disna, a proglacial lake linked to the FIS during Heinrich Stadial 1. Regional interactions within the climate–lake–FIS system, linked to changes in the availability of subglacial water, led to abrupt drainage cycles of the FIS into the BS watershed. This phenomenon raised the BS water level by ∼100 m until the sill of the Bosphorus Strait was reached, flooding the vast northwestern BS shelf and deeply affecting the hydrology and circulation of the BS and, probably, of the Marmara and Aegean Seas. |
format |
Article in Journal/Newspaper |
author |
Soulet, Guillaume Menot, Guillemette Bayon, Germain Rostek, Frauke Ponzevera, Emmanuel Toucanne, Samuel Lericolais, Gilles Bard, Edouard |
author_facet |
Soulet, Guillaume Menot, Guillemette Bayon, Germain Rostek, Frauke Ponzevera, Emmanuel Toucanne, Samuel Lericolais, Gilles Bard, Edouard |
author_sort |
Soulet, Guillaume |
title |
Abrupt drainage cycles of the Fennoscandian Ice Sheet |
title_short |
Abrupt drainage cycles of the Fennoscandian Ice Sheet |
title_full |
Abrupt drainage cycles of the Fennoscandian Ice Sheet |
title_fullStr |
Abrupt drainage cycles of the Fennoscandian Ice Sheet |
title_full_unstemmed |
Abrupt drainage cycles of the Fennoscandian Ice Sheet |
title_sort |
abrupt drainage cycles of the fennoscandian ice sheet |
publisher |
Natl Acad Sciences |
publishDate |
2013 |
url |
https://archimer.ifremer.fr/doc/00134/24489/22515.pdf https://archimer.ifremer.fr/doc/00134/24489/22516.pdf https://doi.org/10.1073/pnas.1214676110 https://archimer.ifremer.fr/doc/00134/24489/ |
genre |
Fennoscandian Ice Sheet |
genre_facet |
Fennoscandian Ice Sheet |
op_source |
Proceedings Of The National Academy Of Sciences Of The United States Of America (0027-8424) (Natl Acad Sciences), 2013-04 , Vol. 110 , N. 17 , P. 6682-6687 |
op_relation |
https://archimer.ifremer.fr/doc/00134/24489/22515.pdf https://archimer.ifremer.fr/doc/00134/24489/22516.pdf doi:10.1073/pnas.1214676110 https://archimer.ifremer.fr/doc/00134/24489/ |
op_rights |
© 2013 National Academy of Sciences info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1073/pnas.1214676110 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
110 |
container_issue |
17 |
container_start_page |
6682 |
op_container_end_page |
6687 |
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1765998475907956736 |