Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles
The last glacial period was marked by pronounced millennial-scale variability in ocean circulation and global climate. Shifts in sea ice cover within the Nordic Seas are believed to have amplified the glacial climate variability in northern high latitudes and contributed to abrupt, high-amplitude te...
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American Association for the Advancement of Science (AAAS)
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Online Access: | https://archimer.ifremer.fr/doc/00484/59606/62620.pdf https://archimer.ifremer.fr/doc/00484/59606/62621.pdf https://doi.org/10.1126/sciadv.aau6174 https://archimer.ifremer.fr/doc/00484/59606/ |
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ftarchimer:oai:archimer.ifremer.fr:59606 2023-05-15T16:27:14+02:00 Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles Sadatzki, Henrik Dokken, Trond M. Berben, Sarah M. P. Muschitiello, Francesco Stein, Ruediger Fahl, Kirsten Menviel, Laurie Timmermann, Axel Jansen, Eystein 2019-03 application/pdf https://archimer.ifremer.fr/doc/00484/59606/62620.pdf https://archimer.ifremer.fr/doc/00484/59606/62621.pdf https://doi.org/10.1126/sciadv.aau6174 https://archimer.ifremer.fr/doc/00484/59606/ eng eng American Association for the Advancement of Science (AAAS) info:eu-repo/grantAgreement/EC/FP7/610055/EU//ICE2ICE https://archimer.ifremer.fr/doc/00484/59606/62620.pdf https://archimer.ifremer.fr/doc/00484/59606/62621.pdf doi:10.1126/sciadv.aau6174 https://archimer.ifremer.fr/doc/00484/59606/ info:eu-repo/semantics/openAccess restricted use Science Advances (2375-2548) (American Association for the Advancement of Science (AAAS)), 2019-03 , Vol. 5 , N. 3 , P. eaau6174 (11p.) text Publication info:eu-repo/semantics/article 2019 ftarchimer https://doi.org/10.1126/sciadv.aau6174 2021-09-23T20:32:13Z The last glacial period was marked by pronounced millennial-scale variability in ocean circulation and global climate. Shifts in sea ice cover within the Nordic Seas are believed to have amplified the glacial climate variability in northern high latitudes and contributed to abrupt, high-amplitude temperature changes over Greenland. We present unprecedented empirical evidence that resolves the nature, timing, and role of sea ice fluctuations for abrupt ocean and climate change 32 to 40 thousand years ago, using biomarker sea ice reconstructions from the southern Norwegian Sea. Our results document that initial sea ice reductions at the core site preceded the major reinvigoration of convective deep-water formation in the Nordic Seas and abrupt Greenland warming; sea ice expansions preceded the buildup of a deep oceanic heat reservoir. Our findings suggest that the sea ice variability shaped regime shifts between surface stratification and deep convection in the Nordic Seas during abrupt climate changes. Article in Journal/Newspaper Greenland Nordic Seas Norwegian Sea Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Greenland Norwegian Sea Science Advances 5 3 eaau6174 |
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 |
description |
The last glacial period was marked by pronounced millennial-scale variability in ocean circulation and global climate. Shifts in sea ice cover within the Nordic Seas are believed to have amplified the glacial climate variability in northern high latitudes and contributed to abrupt, high-amplitude temperature changes over Greenland. We present unprecedented empirical evidence that resolves the nature, timing, and role of sea ice fluctuations for abrupt ocean and climate change 32 to 40 thousand years ago, using biomarker sea ice reconstructions from the southern Norwegian Sea. Our results document that initial sea ice reductions at the core site preceded the major reinvigoration of convective deep-water formation in the Nordic Seas and abrupt Greenland warming; sea ice expansions preceded the buildup of a deep oceanic heat reservoir. Our findings suggest that the sea ice variability shaped regime shifts between surface stratification and deep convection in the Nordic Seas during abrupt climate changes. |
format |
Article in Journal/Newspaper |
author |
Sadatzki, Henrik Dokken, Trond M. Berben, Sarah M. P. Muschitiello, Francesco Stein, Ruediger Fahl, Kirsten Menviel, Laurie Timmermann, Axel Jansen, Eystein |
spellingShingle |
Sadatzki, Henrik Dokken, Trond M. Berben, Sarah M. P. Muschitiello, Francesco Stein, Ruediger Fahl, Kirsten Menviel, Laurie Timmermann, Axel Jansen, Eystein Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles |
author_facet |
Sadatzki, Henrik Dokken, Trond M. Berben, Sarah M. P. Muschitiello, Francesco Stein, Ruediger Fahl, Kirsten Menviel, Laurie Timmermann, Axel Jansen, Eystein |
author_sort |
Sadatzki, Henrik |
title |
Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles |
title_short |
Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles |
title_full |
Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles |
title_fullStr |
Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles |
title_full_unstemmed |
Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles |
title_sort |
sea ice variability in the southern norwegian sea during glacial dansgaard-oeschger climate cycles |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2019 |
url |
https://archimer.ifremer.fr/doc/00484/59606/62620.pdf https://archimer.ifremer.fr/doc/00484/59606/62621.pdf https://doi.org/10.1126/sciadv.aau6174 https://archimer.ifremer.fr/doc/00484/59606/ |
geographic |
Greenland Norwegian Sea |
geographic_facet |
Greenland Norwegian Sea |
genre |
Greenland Nordic Seas Norwegian Sea Sea ice |
genre_facet |
Greenland Nordic Seas Norwegian Sea Sea ice |
op_source |
Science Advances (2375-2548) (American Association for the Advancement of Science (AAAS)), 2019-03 , Vol. 5 , N. 3 , P. eaau6174 (11p.) |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/610055/EU//ICE2ICE https://archimer.ifremer.fr/doc/00484/59606/62620.pdf https://archimer.ifremer.fr/doc/00484/59606/62621.pdf doi:10.1126/sciadv.aau6174 https://archimer.ifremer.fr/doc/00484/59606/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1126/sciadv.aau6174 |
container_title |
Science Advances |
container_volume |
5 |
container_issue |
3 |
container_start_page |
eaau6174 |
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1766016362086400000 |