Subsurface ocean warming preceded Heinrich Events
Although the global environmental impact of Laurentide Ice-Sheet destabilizations on glacial climate during Heinrich Events is well-documented, the mechanism driving these ice-sheet instabilities remains elusive. Here we report foraminifera-based subsurface (~150 m water depth) ocean temperature and...
Published in: | Nature Communications |
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Nature Research
2022
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Online Access: | https://oceanrep.geomar.de/id/eprint/56707/ https://oceanrep.geomar.de/id/eprint/56707/1/s41467-022-31754-x.pdf https://oceanrep.geomar.de/id/eprint/56707/7/41467_2022_31754_MOESM1_ESM.pdf https://doi.org/10.1038/s41467-022-31754-x |
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ftoceanrep:oai:oceanrep.geomar.de:56707 2024-02-11T10:01:22+01:00 Subsurface ocean warming preceded Heinrich Events Max, Lars Nürnberg, Dirk Chiessi, Cristiano M. Lenz, Marlene M. Mulitza, Stefan 2022-07-21 text https://oceanrep.geomar.de/id/eprint/56707/ https://oceanrep.geomar.de/id/eprint/56707/1/s41467-022-31754-x.pdf https://oceanrep.geomar.de/id/eprint/56707/7/41467_2022_31754_MOESM1_ESM.pdf https://doi.org/10.1038/s41467-022-31754-x en eng Nature Research https://oceanrep.geomar.de/id/eprint/56707/1/s41467-022-31754-x.pdf https://oceanrep.geomar.de/id/eprint/56707/7/41467_2022_31754_MOESM1_ESM.pdf Max, L., Nürnberg, D. , Chiessi, C. M., Lenz, M. M. and Mulitza, S. (2022) Subsurface ocean warming preceded Heinrich Events. Open Access Nature Communications, 13 . Art.Nr. 4217 (2022). DOI 10.1038/s41467-022-31754-x <https://doi.org/10.1038/s41467-022-31754-x>. doi:10.1038/s41467-022-31754-x cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2022 ftoceanrep https://doi.org/10.1038/s41467-022-31754-x 2024-01-15T00:25:40Z Although the global environmental impact of Laurentide Ice-Sheet destabilizations on glacial climate during Heinrich Events is well-documented, the mechanism driving these ice-sheet instabilities remains elusive. Here we report foraminifera-based subsurface (~150 m water depth) ocean temperature and salinity reconstructions from a sediment core collected in the western subpolar North Atlantic, showing a consistent pattern of rapid subsurface ocean warming preceding the transition into each Heinrich Event identified in the same core of the last 27,000 years. These results provide the first solid evidence for the massive accumulation of ocean heat near the critical depth to trigger melting of marine-terminating portions of the Laurentide Ice Sheet around Labrador Sea followed by Heinrich Events. The repeated build-up of a subsurface heat reservoir in the subpolar Atlantic closely corresponds to times of weakened Atlantic Meridional Overturning Circulation, indicating a precursor role of ocean circulation changes for initiating abrupt ice-sheet instabilities during Heinrich Events. We infer that a weaker ocean circulation in future may result in accelerated interior-ocean warming of the subpolar Atlantic, which could be critical for the stability of modern, marine-terminating Arctic glaciers and the freshwater budget of the North Atlantic. Article in Journal/Newspaper Arctic Foraminifera* Ice Sheet Labrador Sea North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Nature Communications 13 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 |
Although the global environmental impact of Laurentide Ice-Sheet destabilizations on glacial climate during Heinrich Events is well-documented, the mechanism driving these ice-sheet instabilities remains elusive. Here we report foraminifera-based subsurface (~150 m water depth) ocean temperature and salinity reconstructions from a sediment core collected in the western subpolar North Atlantic, showing a consistent pattern of rapid subsurface ocean warming preceding the transition into each Heinrich Event identified in the same core of the last 27,000 years. These results provide the first solid evidence for the massive accumulation of ocean heat near the critical depth to trigger melting of marine-terminating portions of the Laurentide Ice Sheet around Labrador Sea followed by Heinrich Events. The repeated build-up of a subsurface heat reservoir in the subpolar Atlantic closely corresponds to times of weakened Atlantic Meridional Overturning Circulation, indicating a precursor role of ocean circulation changes for initiating abrupt ice-sheet instabilities during Heinrich Events. We infer that a weaker ocean circulation in future may result in accelerated interior-ocean warming of the subpolar Atlantic, which could be critical for the stability of modern, marine-terminating Arctic glaciers and the freshwater budget of the North Atlantic. |
format |
Article in Journal/Newspaper |
author |
Max, Lars Nürnberg, Dirk Chiessi, Cristiano M. Lenz, Marlene M. Mulitza, Stefan |
spellingShingle |
Max, Lars Nürnberg, Dirk Chiessi, Cristiano M. Lenz, Marlene M. Mulitza, Stefan Subsurface ocean warming preceded Heinrich Events |
author_facet |
Max, Lars Nürnberg, Dirk Chiessi, Cristiano M. Lenz, Marlene M. Mulitza, Stefan |
author_sort |
Max, Lars |
title |
Subsurface ocean warming preceded Heinrich Events |
title_short |
Subsurface ocean warming preceded Heinrich Events |
title_full |
Subsurface ocean warming preceded Heinrich Events |
title_fullStr |
Subsurface ocean warming preceded Heinrich Events |
title_full_unstemmed |
Subsurface ocean warming preceded Heinrich Events |
title_sort |
subsurface ocean warming preceded heinrich events |
publisher |
Nature Research |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/56707/ https://oceanrep.geomar.de/id/eprint/56707/1/s41467-022-31754-x.pdf https://oceanrep.geomar.de/id/eprint/56707/7/41467_2022_31754_MOESM1_ESM.pdf https://doi.org/10.1038/s41467-022-31754-x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Foraminifera* Ice Sheet Labrador Sea North Atlantic |
genre_facet |
Arctic Foraminifera* Ice Sheet Labrador Sea North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/56707/1/s41467-022-31754-x.pdf https://oceanrep.geomar.de/id/eprint/56707/7/41467_2022_31754_MOESM1_ESM.pdf Max, L., Nürnberg, D. , Chiessi, C. M., Lenz, M. M. and Mulitza, S. (2022) Subsurface ocean warming preceded Heinrich Events. Open Access Nature Communications, 13 . Art.Nr. 4217 (2022). DOI 10.1038/s41467-022-31754-x <https://doi.org/10.1038/s41467-022-31754-x>. doi:10.1038/s41467-022-31754-x |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-022-31754-x |
container_title |
Nature Communications |
container_volume |
13 |
container_issue |
1 |
_version_ |
1790597176316919808 |