Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes
9 pags., 5 figs., 2 tabs. Sea ice decline in the North Atlantic and Nordic Seas has been proposed to contribute to the repeated abrupt atmospheric warmings recorded in Greenland ice cores during the last glacial period, known as Dansgaard-Oeschger (D-O) events. However, the understanding of how sea...
Published in: | Proceedings of the National Academy of Sciences |
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Other Authors: | , , , , , , , , , , , , , , , , , , |
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Language: | English |
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National Academy of Sciences (U.S.)
2022
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Online Access: | http://hdl.handle.net/10261/296059 https://doi.org/10.1073/pnas.2203468119 https://doi.org/10.13039/501100003130 https://doi.org/10.13039/501100000046 https://doi.org/10.13039/100000001 https://doi.org/10.13039/501100000270 https://doi.org/10.13039/501100001665 https://doi.org/10.13039/501100003207 https://doi.org/10.13039/501100004794 https://doi.org/10.13039/501100002367 https://doi.org/10.13039/501100006489 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100002661 https://doi.org/10.13039/501100001840 https://doi.org/10.13039/501100004796 https://api.elsevier.com/content/abstract/scopus_id/85140561832 |
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Open Polar |
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Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Baffin Bay Dansgaard-Oeschger events Labrador Sea Abrupt climate changes Sea ice reconstruction |
spellingShingle |
Baffin Bay Dansgaard-Oeschger events Labrador Sea Abrupt climate changes Sea ice reconstruction Scoto, Federico Sadatzki, Henrik Maffezzoli, Niccolò Barbante, Carlo Gagliardi, Alessandro Varin, Cristiano Vallelonga, Paul Gkinis, Vasileios Dahl-Jensen, Dorthe Kjær, Helle Astrid Burgay, François Saiz-Lopez, A. Stein, Ruediger Spolaor, Andrea Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes |
topic_facet |
Baffin Bay Dansgaard-Oeschger events Labrador Sea Abrupt climate changes Sea ice reconstruction |
description |
9 pags., 5 figs., 2 tabs. Sea ice decline in the North Atlantic and Nordic Seas has been proposed to contribute to the repeated abrupt atmospheric warmings recorded in Greenland ice cores during the last glacial period, known as Dansgaard-Oeschger (D-O) events. However, the understanding of how sea ice changes were coupled with abrupt climate changes during D-O events has remained incomplete due to a lack of suitable high-resolution sea ice proxy records from northwestern North Atlantic regions. Here, we present a subdecadal-scale bromine enrichment (Brenr) record from the NEEM ice core (Northwest Greenland) and sediment core biomarker records to reconstruct the variability of seasonal sea ice in the Baffin Bay and Labrador Sea over a suite of D-O events between 34 and 42 ka. Our results reveal repeated shifts between stable, multiyear sea ice (MYSI) conditions during cold stadials and unstable, seasonal sea ice conditions during warmer interstadials. The shift from stadial to interstadial sea ice conditions occurred rapidly and synchronously with the atmospheric warming over Greenland, while the amplitude of high-frequency sea ice fluctuations increased through interstadials. Our findings suggest that the rapid replacement of widespread MYSI with seasonal sea ice amplified the abrupt climate warming over the course of D-O events and highlight the role of feedbacks associated with late-interstadial seasonal sea ice expansion in driving the North Atlantic ocean-climate system back to stadial conditions. The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007–2013) grant agreements #243908 “Past4Future. Climate change—Learning from the past climate” and #610055 “Ice2ice”. We thank our colleagues at Centre for Ice and Climate (Copenhagen, Denmark) for their generous contribution and providing the NEEM ice core samples. NEEM is directed and organized by the Center of Ice and Climate at the Niels Bohr Institute ... |
author2 |
European Commission National Science Foundation (US) Fonds de La Recherche Scientifique (Belgique) Research Foundation - Flanders National Research Council of Canada Chinese Academy of Sciences Innovation Fund Denmark Institut Polaire Français Paul Emile Victor Centre National de la Recherche Scientifique (France) Commissariat à l'Ènergie Atomique et aux Ènergies Alternatives (France) Agence Nationale de la Recherche (France) Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (Germany) Icelandic Centre for Research National Institute of Polar Research (Japan) Korea Polar Research Institute Dutch Research Council Swedish Research Council Swiss National Science Foundation Natural Environment Research Council (UK) |
format |
Article in Journal/Newspaper |
author |
Scoto, Federico Sadatzki, Henrik Maffezzoli, Niccolò Barbante, Carlo Gagliardi, Alessandro Varin, Cristiano Vallelonga, Paul Gkinis, Vasileios Dahl-Jensen, Dorthe Kjær, Helle Astrid Burgay, François Saiz-Lopez, A. Stein, Ruediger Spolaor, Andrea |
author_facet |
Scoto, Federico Sadatzki, Henrik Maffezzoli, Niccolò Barbante, Carlo Gagliardi, Alessandro Varin, Cristiano Vallelonga, Paul Gkinis, Vasileios Dahl-Jensen, Dorthe Kjær, Helle Astrid Burgay, François Saiz-Lopez, A. Stein, Ruediger Spolaor, Andrea |
author_sort |
Scoto, Federico |
title |
Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes |
title_short |
Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes |
title_full |
Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes |
title_fullStr |
Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes |
title_full_unstemmed |
Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes |
title_sort |
sea ice fluctuations in the baffin bay and the labrador sea during glacial abrupt climate changes |
publisher |
National Academy of Sciences (U.S.) |
publishDate |
2022 |
url |
http://hdl.handle.net/10261/296059 https://doi.org/10.1073/pnas.2203468119 https://doi.org/10.13039/501100003130 https://doi.org/10.13039/501100000046 https://doi.org/10.13039/100000001 https://doi.org/10.13039/501100000270 https://doi.org/10.13039/501100001665 https://doi.org/10.13039/501100003207 https://doi.org/10.13039/501100004794 https://doi.org/10.13039/501100002367 https://doi.org/10.13039/501100006489 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100002661 https://doi.org/10.13039/501100001840 https://doi.org/10.13039/501100004796 https://api.elsevier.com/content/abstract/scopus_id/85140561832 |
geographic |
Baffin Bay Greenland |
geographic_facet |
Baffin Bay Greenland |
genre |
Baffin Bay Baffin Bay Baffin Dansgaard-Oeschger events Greenland Greenland ice cores ice core Labrador Sea Nordic Seas North Atlantic Sea ice |
genre_facet |
Baffin Bay Baffin Bay Baffin Dansgaard-Oeschger events Greenland Greenland ice cores ice core Labrador Sea Nordic Seas North Atlantic Sea ice |
op_relation |
#PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7243908 info:eu-repo/grantAgreement/EC/FP7610055 Proceedings of the National Academy of Sciences of the United States of America Publisher's version https://doi.org/10.1073/pnas.2203468119 Sí Proceedings of the National Academy of Sciences of the USA 119(44): e2203468119 (2022) 0027-8424 http://hdl.handle.net/10261/296059 doi:10.1073/pnas.2203468119 http://dx.doi.org/10.13039/501100003130 http://dx.doi.org/10.13039/501100000046 http://dx.doi.org/10.13039/100000001 http://dx.doi.org/10.13039/501100000270 http://dx.doi.org/10.13039/501100001665 http://dx.doi.org/10.13039/501100003207 http://dx.doi.org/10.13039/501100004794 http://dx.doi.org/10.13039/501100002367 http://dx.doi.org/10.13039/501100006489 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100002661 http://dx.doi.org/10.13039/501100001840 http://dx.doi.org/10.13039/501100004796 36279448 2-s2.0-85140561832 https://api.elsevier.com/content/abstract/scopus_id/85140561832 |
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https://doi.org/10.1073/pnas.220346811910.13039/50110000313010.13039/50110000004610.13039/10000000110.13039/50110000027010.13039/50110000166510.13039/50110000320710.13039/50110000479410.13039/50110000236710.13039/50110000648910.13039/50110000078010.13039/ |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
119 |
container_issue |
44 |
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ftcsic:oai:digital.csic.es:10261/296059 2024-06-23T07:51:28+00:00 Sea ice fluctuations in the Baffin Bay and the Labrador Sea during glacial abrupt climate changes Scoto, Federico Sadatzki, Henrik Maffezzoli, Niccolò Barbante, Carlo Gagliardi, Alessandro Varin, Cristiano Vallelonga, Paul Gkinis, Vasileios Dahl-Jensen, Dorthe Kjær, Helle Astrid Burgay, François Saiz-Lopez, A. Stein, Ruediger Spolaor, Andrea European Commission National Science Foundation (US) Fonds de La Recherche Scientifique (Belgique) Research Foundation - Flanders National Research Council of Canada Chinese Academy of Sciences Innovation Fund Denmark Institut Polaire Français Paul Emile Victor Centre National de la Recherche Scientifique (France) Commissariat à l'Ènergie Atomique et aux Ènergies Alternatives (France) Agence Nationale de la Recherche (France) Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research (Germany) Icelandic Centre for Research National Institute of Polar Research (Japan) Korea Polar Research Institute Dutch Research Council Swedish Research Council Swiss National Science Foundation Natural Environment Research Council (UK) 2022-10-24 http://hdl.handle.net/10261/296059 https://doi.org/10.1073/pnas.2203468119 https://doi.org/10.13039/501100003130 https://doi.org/10.13039/501100000046 https://doi.org/10.13039/100000001 https://doi.org/10.13039/501100000270 https://doi.org/10.13039/501100001665 https://doi.org/10.13039/501100003207 https://doi.org/10.13039/501100004794 https://doi.org/10.13039/501100002367 https://doi.org/10.13039/501100006489 https://doi.org/10.13039/501100000780 https://doi.org/10.13039/501100002661 https://doi.org/10.13039/501100001840 https://doi.org/10.13039/501100004796 https://api.elsevier.com/content/abstract/scopus_id/85140561832 en eng National Academy of Sciences (U.S.) #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/EC/FP7243908 info:eu-repo/grantAgreement/EC/FP7610055 Proceedings of the National Academy of Sciences of the United States of America Publisher's version https://doi.org/10.1073/pnas.2203468119 Sí Proceedings of the National Academy of Sciences of the USA 119(44): e2203468119 (2022) 0027-8424 http://hdl.handle.net/10261/296059 doi:10.1073/pnas.2203468119 http://dx.doi.org/10.13039/501100003130 http://dx.doi.org/10.13039/501100000046 http://dx.doi.org/10.13039/100000001 http://dx.doi.org/10.13039/501100000270 http://dx.doi.org/10.13039/501100001665 http://dx.doi.org/10.13039/501100003207 http://dx.doi.org/10.13039/501100004794 http://dx.doi.org/10.13039/501100002367 http://dx.doi.org/10.13039/501100006489 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100002661 http://dx.doi.org/10.13039/501100001840 http://dx.doi.org/10.13039/501100004796 36279448 2-s2.0-85140561832 https://api.elsevier.com/content/abstract/scopus_id/85140561832 open Baffin Bay Dansgaard-Oeschger events Labrador Sea Abrupt climate changes Sea ice reconstruction artículo http://purl.org/coar/resource_type/c_6501 2022 ftcsic https://doi.org/10.1073/pnas.220346811910.13039/50110000313010.13039/50110000004610.13039/10000000110.13039/50110000027010.13039/50110000166510.13039/50110000320710.13039/50110000479410.13039/50110000236710.13039/50110000648910.13039/50110000078010.13039/ 2024-05-29T00:01:24Z 9 pags., 5 figs., 2 tabs. Sea ice decline in the North Atlantic and Nordic Seas has been proposed to contribute to the repeated abrupt atmospheric warmings recorded in Greenland ice cores during the last glacial period, known as Dansgaard-Oeschger (D-O) events. However, the understanding of how sea ice changes were coupled with abrupt climate changes during D-O events has remained incomplete due to a lack of suitable high-resolution sea ice proxy records from northwestern North Atlantic regions. Here, we present a subdecadal-scale bromine enrichment (Brenr) record from the NEEM ice core (Northwest Greenland) and sediment core biomarker records to reconstruct the variability of seasonal sea ice in the Baffin Bay and Labrador Sea over a suite of D-O events between 34 and 42 ka. Our results reveal repeated shifts between stable, multiyear sea ice (MYSI) conditions during cold stadials and unstable, seasonal sea ice conditions during warmer interstadials. The shift from stadial to interstadial sea ice conditions occurred rapidly and synchronously with the atmospheric warming over Greenland, while the amplitude of high-frequency sea ice fluctuations increased through interstadials. Our findings suggest that the rapid replacement of widespread MYSI with seasonal sea ice amplified the abrupt climate warming over the course of D-O events and highlight the role of feedbacks associated with late-interstadial seasonal sea ice expansion in driving the North Atlantic ocean-climate system back to stadial conditions. The research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007–2013) grant agreements #243908 “Past4Future. Climate change—Learning from the past climate” and #610055 “Ice2ice”. We thank our colleagues at Centre for Ice and Climate (Copenhagen, Denmark) for their generous contribution and providing the NEEM ice core samples. NEEM is directed and organized by the Center of Ice and Climate at the Niels Bohr Institute ... Article in Journal/Newspaper Baffin Bay Baffin Bay Baffin Dansgaard-Oeschger events Greenland Greenland ice cores ice core Labrador Sea Nordic Seas North Atlantic Sea ice Digital.CSIC (Spanish National Research Council) Baffin Bay Greenland Proceedings of the National Academy of Sciences 119 44 |