A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum
Paleoclimate proxy records from the North Atlantic region reveal substantially greater multicentennial temperature variability during the Last Glacial Maximum (LGM) compared to the current interglacial. As there was no obvious change in external forcing, causes for the increased variability remain u...
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ftpubmed:oai:pubmedcentral.nih.gov:10619932 2023-12-03T10:26:28+01:00 A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum Prange, Matthias Jonkers, Lukas Merkel, Ute Schulz, Michael Bakker, Pepijn 2023-11-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10619932/ https://doi.org/10.1126/sciadv.adh1106 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10619932/ http://dx.doi.org/10.1126/sciadv.adh1106 Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. Sci Adv Earth Environmental Ecological and Space Sciences Text 2023 ftpubmed https://doi.org/10.1126/sciadv.adh1106 2023-11-05T02:14:53Z Paleoclimate proxy records from the North Atlantic region reveal substantially greater multicentennial temperature variability during the Last Glacial Maximum (LGM) compared to the current interglacial. As there was no obvious change in external forcing, causes for the increased variability remain unknown. Exploiting LGM simulations with a comprehensive coupled climate model along with high-resolution proxy records, we introduce an oscillatory mode of multicentennial variability, which is associated with moderate variations in the Atlantic meridional overturning circulation and depends on the large-scale salinity distribution. This self-sustained mode is amplified by sea-ice feedbacks and induces maximum surface temperature variability in the subpolar North Atlantic region. Characterized by a distinct climatic imprint and different dynamics, the multicentennial oscillation has to be distinguished from Dansgaard-Oeschger variability and emerges only under full LGM climate forcing. The potential of multicentennial modes of variability to emerge or disappear in response to changing climate forcing may have implications for future climate change. Text North Atlantic Sea ice PubMed Central (PMC) Science Advances 9 44 |
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English |
topic |
Earth Environmental Ecological and Space Sciences |
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Earth Environmental Ecological and Space Sciences Prange, Matthias Jonkers, Lukas Merkel, Ute Schulz, Michael Bakker, Pepijn A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum |
topic_facet |
Earth Environmental Ecological and Space Sciences |
description |
Paleoclimate proxy records from the North Atlantic region reveal substantially greater multicentennial temperature variability during the Last Glacial Maximum (LGM) compared to the current interglacial. As there was no obvious change in external forcing, causes for the increased variability remain unknown. Exploiting LGM simulations with a comprehensive coupled climate model along with high-resolution proxy records, we introduce an oscillatory mode of multicentennial variability, which is associated with moderate variations in the Atlantic meridional overturning circulation and depends on the large-scale salinity distribution. This self-sustained mode is amplified by sea-ice feedbacks and induces maximum surface temperature variability in the subpolar North Atlantic region. Characterized by a distinct climatic imprint and different dynamics, the multicentennial oscillation has to be distinguished from Dansgaard-Oeschger variability and emerges only under full LGM climate forcing. The potential of multicentennial modes of variability to emerge or disappear in response to changing climate forcing may have implications for future climate change. |
format |
Text |
author |
Prange, Matthias Jonkers, Lukas Merkel, Ute Schulz, Michael Bakker, Pepijn |
author_facet |
Prange, Matthias Jonkers, Lukas Merkel, Ute Schulz, Michael Bakker, Pepijn |
author_sort |
Prange, Matthias |
title |
A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum |
title_short |
A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum |
title_full |
A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum |
title_fullStr |
A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum |
title_full_unstemmed |
A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum |
title_sort |
multicentennial mode of north atlantic climate variability throughout the last glacial maximum |
publisher |
American Association for the Advancement of Science |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10619932/ https://doi.org/10.1126/sciadv.adh1106 |
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North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10619932/ http://dx.doi.org/10.1126/sciadv.adh1106 |
op_rights |
Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). https://creativecommons.org/licenses/by-nc/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (https://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. |
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https://doi.org/10.1126/sciadv.adh1106 |
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Science Advances |
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44 |
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