A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles
The evolution of the northern hemispheric climate during the last glacial period was beset by quasi-episodic iceberg discharge events from the Laurentide ice sheet, known as Heinrich events (HEs). The paleo record places most HEs into the cold stadial of the Dansgaard-Oeschger cycle. However, not ev...
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Online Access: | https://oceanrep.geomar.de/id/eprint/60340/ https://oceanrep.geomar.de/id/eprint/60340/1/s41467-024-47141-7.pdf https://doi.org/10.1038/s41467-024-47141-7 |
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ftoceanrep:oai:oceanrep.geomar.de:60340 2024-06-23T07:53:46+00:00 A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles Schannwell, Clemens Mikolajewicz, Uwe Kapsch, Marie-Luise Ziemen, Florian 2024-04-05 text https://oceanrep.geomar.de/id/eprint/60340/ https://oceanrep.geomar.de/id/eprint/60340/1/s41467-024-47141-7.pdf https://doi.org/10.1038/s41467-024-47141-7 en eng Nature Research https://oceanrep.geomar.de/id/eprint/60340/1/s41467-024-47141-7.pdf Schannwell, C., Mikolajewicz, U., Kapsch, M. L. and Ziemen, F. (2024) A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles. Open Access Nature Communications, 15 (1). Art.Nr. 2961. DOI 10.1038/s41467-024-47141-7 <https://doi.org/10.1038/s41467-024-47141-7>. doi:10.1038/s41467-024-47141-7 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2024 ftoceanrep https://doi.org/10.1038/s41467-024-47141-7 2024-06-04T14:22:41Z The evolution of the northern hemispheric climate during the last glacial period was beset by quasi-episodic iceberg discharge events from the Laurentide ice sheet, known as Heinrich events (HEs). The paleo record places most HEs into the cold stadial of the Dansgaard-Oeschger cycle. However, not every Dansgaard-Oeschger cycle is associated with a HE, revealing a complex interplay between the two modes of glacial variability. Here, using a coupled ice sheet-solid earth model, we introduce a mechanism that explains the synchronicity of HEs and Dansgaard-Oeschger cycles. Unlike earlier studies, our mechanism does not require a trigger during the stadial. Instead, the atmospheric warming signal during the interstadial of the Dansgaard-Oeschger cycle causes enhanced ice stream thickening that leads to the HE during the late interstadial. We demonstrate that this mechanism reproduces the key HE characteristics and provides an explanation for synchronous HEs from different regions of the Laurentide ice sheet. Article in Journal/Newspaper Ice Sheet OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Nature Communications 15 1 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
The evolution of the northern hemispheric climate during the last glacial period was beset by quasi-episodic iceberg discharge events from the Laurentide ice sheet, known as Heinrich events (HEs). The paleo record places most HEs into the cold stadial of the Dansgaard-Oeschger cycle. However, not every Dansgaard-Oeschger cycle is associated with a HE, revealing a complex interplay between the two modes of glacial variability. Here, using a coupled ice sheet-solid earth model, we introduce a mechanism that explains the synchronicity of HEs and Dansgaard-Oeschger cycles. Unlike earlier studies, our mechanism does not require a trigger during the stadial. Instead, the atmospheric warming signal during the interstadial of the Dansgaard-Oeschger cycle causes enhanced ice stream thickening that leads to the HE during the late interstadial. We demonstrate that this mechanism reproduces the key HE characteristics and provides an explanation for synchronous HEs from different regions of the Laurentide ice sheet. |
format |
Article in Journal/Newspaper |
author |
Schannwell, Clemens Mikolajewicz, Uwe Kapsch, Marie-Luise Ziemen, Florian |
spellingShingle |
Schannwell, Clemens Mikolajewicz, Uwe Kapsch, Marie-Luise Ziemen, Florian A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles |
author_facet |
Schannwell, Clemens Mikolajewicz, Uwe Kapsch, Marie-Luise Ziemen, Florian |
author_sort |
Schannwell, Clemens |
title |
A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles |
title_short |
A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles |
title_full |
A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles |
title_fullStr |
A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles |
title_full_unstemmed |
A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles |
title_sort |
mechanism for reconciling the synchronisation of heinrich events and dansgaard-oeschger cycles |
publisher |
Nature Research |
publishDate |
2024 |
url |
https://oceanrep.geomar.de/id/eprint/60340/ https://oceanrep.geomar.de/id/eprint/60340/1/s41467-024-47141-7.pdf https://doi.org/10.1038/s41467-024-47141-7 |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
https://oceanrep.geomar.de/id/eprint/60340/1/s41467-024-47141-7.pdf Schannwell, C., Mikolajewicz, U., Kapsch, M. L. and Ziemen, F. (2024) A mechanism for reconciling the synchronisation of Heinrich events and Dansgaard-Oeschger cycles. Open Access Nature Communications, 15 (1). Art.Nr. 2961. DOI 10.1038/s41467-024-47141-7 <https://doi.org/10.1038/s41467-024-47141-7>. doi:10.1038/s41467-024-47141-7 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-024-47141-7 |
container_title |
Nature Communications |
container_volume |
15 |
container_issue |
1 |
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1802645572926046208 |