High-resolution record of Northern Hemisphere climate extending into the last interglacial period
Two deep ice cores from central Greenland, drilled in the 1990s, have played a key role in climate reconstructions of the Northern Hemisphere, but the oldest sections of the cores were disturbed in chronology owing to ice folding near the bedrock. Here we present an undisturbed climate record from a...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/94887 2024-09-15T17:47:41+00:00 High-resolution record of Northern Hemisphere climate extending into the last interglacial period NorthGRIP Members, - Lorrain, Reginald Samyn, Denis Tison, Jean-Louis 2004 No full-text files http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/94887 en eng uri/info:doi/10.1038/nature02805 uri/info:scp/4544230974 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/94887 Nature (London), 431 Glaciologie info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2004 ftunivbruxelles 2024-07-19T04:48:16Z Two deep ice cores from central Greenland, drilled in the 1990s, have played a key role in climate reconstructions of the Northern Hemisphere, but the oldest sections of the cores were disturbed in chronology owing to ice folding near the bedrock. Here we present an undisturbed climate record from a North Greenland ice core, which extends back to 123,000 years before the present, within the last interglacial period. The oxygen isotopes in the ice imply that climate was stable during the last interglacial period, with temperatures 5 °C warmer than today. We find unexpectedly large temperature differences between our new record from northern Greenland and the undisturbed sections of the cores from central Greenland, suggesting that the extent of ice in the Northern Hemisphere modulated the latitudinal temperature gradients in Greenland. This record shows a slow decline in temperatures that marked the initiation of the last glacial period. Our record reveals a hitherto unrecognized warm period initiated by an abrupt climate warming about 115,000 years ago, before glacial conditions were fully developed. This event does not appear to have an immediate Antarctic counterpart, suggesting that the climate see-saw between the hemispheres (which dominated the last glacial period) was not operating at this time. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctic Greenland Greenland ice core ice core North Greenland DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
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DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
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ftunivbruxelles |
language |
English |
topic |
Glaciologie |
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Glaciologie NorthGRIP Members, - Lorrain, Reginald Samyn, Denis Tison, Jean-Louis High-resolution record of Northern Hemisphere climate extending into the last interglacial period |
topic_facet |
Glaciologie |
description |
Two deep ice cores from central Greenland, drilled in the 1990s, have played a key role in climate reconstructions of the Northern Hemisphere, but the oldest sections of the cores were disturbed in chronology owing to ice folding near the bedrock. Here we present an undisturbed climate record from a North Greenland ice core, which extends back to 123,000 years before the present, within the last interglacial period. The oxygen isotopes in the ice imply that climate was stable during the last interglacial period, with temperatures 5 °C warmer than today. We find unexpectedly large temperature differences between our new record from northern Greenland and the undisturbed sections of the cores from central Greenland, suggesting that the extent of ice in the Northern Hemisphere modulated the latitudinal temperature gradients in Greenland. This record shows a slow decline in temperatures that marked the initiation of the last glacial period. Our record reveals a hitherto unrecognized warm period initiated by an abrupt climate warming about 115,000 years ago, before glacial conditions were fully developed. This event does not appear to have an immediate Antarctic counterpart, suggesting that the climate see-saw between the hemispheres (which dominated the last glacial period) was not operating at this time. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
NorthGRIP Members, - Lorrain, Reginald Samyn, Denis Tison, Jean-Louis |
author_facet |
NorthGRIP Members, - Lorrain, Reginald Samyn, Denis Tison, Jean-Louis |
author_sort |
NorthGRIP Members, - |
title |
High-resolution record of Northern Hemisphere climate extending into the last interglacial period |
title_short |
High-resolution record of Northern Hemisphere climate extending into the last interglacial period |
title_full |
High-resolution record of Northern Hemisphere climate extending into the last interglacial period |
title_fullStr |
High-resolution record of Northern Hemisphere climate extending into the last interglacial period |
title_full_unstemmed |
High-resolution record of Northern Hemisphere climate extending into the last interglacial period |
title_sort |
high-resolution record of northern hemisphere climate extending into the last interglacial period |
publishDate |
2004 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/94887 |
genre |
Antarc* Antarctic Greenland Greenland ice core ice core North Greenland |
genre_facet |
Antarc* Antarctic Greenland Greenland ice core ice core North Greenland |
op_source |
Nature (London), 431 |
op_relation |
uri/info:doi/10.1038/nature02805 uri/info:scp/4544230974 http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/94887 |
_version_ |
1810497157482938368 |