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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2019
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Online Access: | https://researchers.mq.edu.au/en/publications/9795e52b-d81b-4c3d-8e63-65eccf2ad6fb https://doi.org/10.1126/sciadv.aau6174 https://research-management.mq.edu.au/ws/files/119107591/117375387.pdf http://www.scopus.com/inward/record.url?scp=85062730571&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/DE150100107 |
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ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/9795e52b-d81b-4c3d-8e63-65eccf2ad6fb 2024-06-23T07:53:15+00:00 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 2019-03-06 application/pdf https://researchers.mq.edu.au/en/publications/9795e52b-d81b-4c3d-8e63-65eccf2ad6fb https://doi.org/10.1126/sciadv.aau6174 https://research-management.mq.edu.au/ws/files/119107591/117375387.pdf http://www.scopus.com/inward/record.url?scp=85062730571&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/DE150100107 eng eng info:eu-repo/semantics/openAccess Sadatzki , H , Dokken , T M , Berben , S M P , Muschitiello , F , Stein , R , Fahl , K , Menviel , L , Timmermann , A & Jansen , E 2019 , ' Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles ' , Science Advances , vol. 5 , no. 3 , eaau6174 , pp. 1-10 . https://doi.org/10.1126/sciadv.aau6174 article 2019 ftmacquarieunicr https://doi.org/10.1126/sciadv.aau6174 2024-06-12T23:47:22Z 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 Macquarie University Research Portal Greenland Norwegian Sea Science Advances 5 3 |
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Open Polar |
collection |
Macquarie University Research Portal |
op_collection_id |
ftmacquarieunicr |
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 |
publishDate |
2019 |
url |
https://researchers.mq.edu.au/en/publications/9795e52b-d81b-4c3d-8e63-65eccf2ad6fb https://doi.org/10.1126/sciadv.aau6174 https://research-management.mq.edu.au/ws/files/119107591/117375387.pdf http://www.scopus.com/inward/record.url?scp=85062730571&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/DE150100107 |
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 |
Sadatzki , H , Dokken , T M , Berben , S M P , Muschitiello , F , Stein , R , Fahl , K , Menviel , L , Timmermann , A & Jansen , E 2019 , ' Sea ice variability in the southern Norwegian Sea during glacial Dansgaard-Oeschger climate cycles ' , Science Advances , vol. 5 , no. 3 , eaau6174 , pp. 1-10 . https://doi.org/10.1126/sciadv.aau6174 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1126/sciadv.aau6174 |
container_title |
Science Advances |
container_volume |
5 |
container_issue |
3 |
_version_ |
1802644825903726592 |