Evidence for general instability of past climate from a 250-kyr ice-core record
International audience RECENT results from two ice cores drilled in central Greenland have revealed large, abrupt climate changes of at least regional extent during the late stages of the last glaciation, suggesting that climate in the North Atlantic region is able to reorganize itself rapidly, perh...
Published in: | Nature |
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Main Authors: | , , , , , , , , , , |
Other Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
1993
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Subjects: | |
Online Access: | https://hal.archives-ouvertes.fr/hal-01103728 https://hal.archives-ouvertes.fr/hal-01103728/document https://hal.archives-ouvertes.fr/hal-01103728/file/Dansgaard1993.pdf https://doi.org/10.1038/364218a0 |
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Université de Nantes: HAL-UNIV-NANTES |
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English |
topic |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
spellingShingle |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology Dansgaard, W. Johnsen, S. J. Clausen, H. B. Dahl-Jensen, D. Gundestrup, N. S. Hammer, C. U. Hvidberg, C. S. Steffensen, J. P. Sveinbjörnsdottir, A. E. Jouzel, Jean Bond, G. Evidence for general instability of past climate from a 250-kyr ice-core record |
topic_facet |
[SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology |
description |
International audience RECENT results from two ice cores drilled in central Greenland have revealed large, abrupt climate changes of at least regional extent during the late stages of the last glaciation, suggesting that climate in the North Atlantic region is able to reorganize itself rapidly, perhaps even within a few decades. Here we present a detailed stable-isotope record for the full length of the Greenland Ice-core Project Summit ice core, extending over the past 250 kyr according to a calculated timescale. We find that climate instability was not confined to the last glaciation, but appears also to have been marked during the last interglacial (as explored more fully in a companion paper) and during the previous Saale–Holstein glacial cycle. This is in contrast with the extreme stability of the Holocene, suggesting that recent climate stability may be the exception rather than the rule. The last interglacial seems to have lasted longer than is implied by the deep-sea SPECMAP record, in agreement with other land-based observations. We suggest that climate instability in the early part of the last interglacial may have delayed the melting of the Saalean ice sheets in America and Eurasia, perhaps accounting for this discrepancy. |
author2 |
Centre for Ice and Climate Copenhagen Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)-Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) University of Iceland Reykjavik Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) CEA / DSM Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Lamont-Doherty Earth Observatory (LDEO) Columbia University New York |
format |
Article in Journal/Newspaper |
author |
Dansgaard, W. Johnsen, S. J. Clausen, H. B. Dahl-Jensen, D. Gundestrup, N. S. Hammer, C. U. Hvidberg, C. S. Steffensen, J. P. Sveinbjörnsdottir, A. E. Jouzel, Jean Bond, G. |
author_facet |
Dansgaard, W. Johnsen, S. J. Clausen, H. B. Dahl-Jensen, D. Gundestrup, N. S. Hammer, C. U. Hvidberg, C. S. Steffensen, J. P. Sveinbjörnsdottir, A. E. Jouzel, Jean Bond, G. |
author_sort |
Dansgaard, W. |
title |
Evidence for general instability of past climate from a 250-kyr ice-core record |
title_short |
Evidence for general instability of past climate from a 250-kyr ice-core record |
title_full |
Evidence for general instability of past climate from a 250-kyr ice-core record |
title_fullStr |
Evidence for general instability of past climate from a 250-kyr ice-core record |
title_full_unstemmed |
Evidence for general instability of past climate from a 250-kyr ice-core record |
title_sort |
evidence for general instability of past climate from a 250-kyr ice-core record |
publisher |
HAL CCSD |
publishDate |
1993 |
url |
https://hal.archives-ouvertes.fr/hal-01103728 https://hal.archives-ouvertes.fr/hal-01103728/document https://hal.archives-ouvertes.fr/hal-01103728/file/Dansgaard1993.pdf https://doi.org/10.1038/364218a0 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core Greenland Ice core Project ice core North Atlantic |
genre_facet |
Greenland Greenland ice core Greenland Ice core Project ice core North Atlantic |
op_source |
ISSN: 0028-0836 EISSN: 1476-4687 Nature https://hal.archives-ouvertes.fr/hal-01103728 Nature, Nature Publishing Group, 1993, 364 (6434), pp.218-220. ⟨10.1038/364218a0⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1038/364218a0 hal-01103728 https://hal.archives-ouvertes.fr/hal-01103728 https://hal.archives-ouvertes.fr/hal-01103728/document https://hal.archives-ouvertes.fr/hal-01103728/file/Dansgaard1993.pdf doi:10.1038/364218a0 |
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http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess |
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CC-BY-NC |
op_doi |
https://doi.org/10.1038/364218a0 |
container_title |
Nature |
container_volume |
364 |
container_issue |
6434 |
container_start_page |
218 |
op_container_end_page |
220 |
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1766017750375858176 |
spelling |
ftunivnantes:oai:HAL:hal-01103728v1 2023-05-15T16:28:07+02:00 Evidence for general instability of past climate from a 250-kyr ice-core record Dansgaard, W. Johnsen, S. J. Clausen, H. B. Dahl-Jensen, D. Gundestrup, N. S. Hammer, C. U. Hvidberg, C. S. Steffensen, J. P. Sveinbjörnsdottir, A. E. Jouzel, Jean Bond, G. Centre for Ice and Climate Copenhagen Niels Bohr Institute Copenhagen (NBI) Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH)-Faculty of Science Copenhagen University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH) University of Iceland Reykjavik Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) CEA / DSM Commissariat à l'énergie atomique et aux énergies alternatives (CEA) Lamont-Doherty Earth Observatory (LDEO) Columbia University New York 1993 https://hal.archives-ouvertes.fr/hal-01103728 https://hal.archives-ouvertes.fr/hal-01103728/document https://hal.archives-ouvertes.fr/hal-01103728/file/Dansgaard1993.pdf https://doi.org/10.1038/364218a0 en eng HAL CCSD Nature Publishing Group info:eu-repo/semantics/altIdentifier/doi/10.1038/364218a0 hal-01103728 https://hal.archives-ouvertes.fr/hal-01103728 https://hal.archives-ouvertes.fr/hal-01103728/document https://hal.archives-ouvertes.fr/hal-01103728/file/Dansgaard1993.pdf doi:10.1038/364218a0 http://creativecommons.org/licenses/by-nc/ info:eu-repo/semantics/OpenAccess CC-BY-NC ISSN: 0028-0836 EISSN: 1476-4687 Nature https://hal.archives-ouvertes.fr/hal-01103728 Nature, Nature Publishing Group, 1993, 364 (6434), pp.218-220. ⟨10.1038/364218a0⟩ [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology info:eu-repo/semantics/article Journal articles 1993 ftunivnantes https://doi.org/10.1038/364218a0 2022-10-04T23:07:18Z International audience RECENT results from two ice cores drilled in central Greenland have revealed large, abrupt climate changes of at least regional extent during the late stages of the last glaciation, suggesting that climate in the North Atlantic region is able to reorganize itself rapidly, perhaps even within a few decades. Here we present a detailed stable-isotope record for the full length of the Greenland Ice-core Project Summit ice core, extending over the past 250 kyr according to a calculated timescale. We find that climate instability was not confined to the last glaciation, but appears also to have been marked during the last interglacial (as explored more fully in a companion paper) and during the previous Saale–Holstein glacial cycle. This is in contrast with the extreme stability of the Holocene, suggesting that recent climate stability may be the exception rather than the rule. The last interglacial seems to have lasted longer than is implied by the deep-sea SPECMAP record, in agreement with other land-based observations. We suggest that climate instability in the early part of the last interglacial may have delayed the melting of the Saalean ice sheets in America and Eurasia, perhaps accounting for this discrepancy. Article in Journal/Newspaper Greenland Greenland ice core Greenland Ice core Project ice core North Atlantic Université de Nantes: HAL-UNIV-NANTES Greenland Nature 364 6434 218 220 |