One-to-one coupling of glacial climate variability in Greenland and Antarctica
Precise knowledge of the phase relationship between climate changes in the two hemispheres is a key for understanding the Earth's climate dynamics. For the last glacial period, ice core studies 1,2 have revealed strong coupling of the largest millennial-scale warm events in Antarctica with the...
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Online Access: | https://doi.org/10.1038/nature05301 |
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fteawag:oai:dora:eawag_5356 2023-05-15T13:42:14+02:00 One-to-one coupling of glacial climate variability in Greenland and Antarctica Barbante, C. Barnola, J.M. Becagli, S. Beer, J. Bigler, M. Boutron, C. Blunier, T. Castellano, E. Cattani, O. Chappellaz, J. Wolff, E. 2006 https://doi.org/10.1038/nature05301 eng eng Springer Nature Nature--Nature--journals:2176--0028-0836--1476-4687 eawag:5356 journal id: journals:2176 issn: 0028-0836 e-issn: 1476-4687 ut: 000241867200038 local: 10839 scopus: 2-s2.0-33750882954 doi:10.1038/nature05301 Text Journal Article 2006 fteawag https://doi.org/10.1038/nature05301 2023-04-09T04:47:48Z Precise knowledge of the phase relationship between climate changes in the two hemispheres is a key for understanding the Earth's climate dynamics. For the last glacial period, ice core studies 1,2 have revealed strong coupling of the largest millennial-scale warm events in Antarctica with the longest Dansgaard - Oeschger events in Greenland 3-5 through the Atlantic meridional overturning circulation 6-8 . It has been unclear, however, whether the shorter Dansgaard - Oeschger events have counterparts in the shorter and less prominent Antarctic temperature variations, and whether these events are linked by the same mechanism. Here we present a glacial climate record derived from an ice core from Dronning Maud Land, Antarctica, which represents South Atlantic climate at a resolution comparable with the Greenland ice core records. After methane synchronization with an ice core from North Greenland 9 , the oxygen isotope record from the Dronning Maud Land ice core shows a one-to-one coupling between all Antarctic warm events and Greenland Dansgaard - Oeschger events by the bipolar seesaw 6 . The amplitude of the Antarctic warm events is found to be linearly dependent on the duration of the concurrent stadial in the North, suggesting that they all result from a similar reduction in the meridional overturning circulation. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dansgaard-Oeschger events Dronning Maud Land Greenland Greenland ice core ice core North Greenland DORA Eawag Antarctic The Antarctic Dronning Maud Land Greenland Nature 444 7116 195 198 |
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English |
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Precise knowledge of the phase relationship between climate changes in the two hemispheres is a key for understanding the Earth's climate dynamics. For the last glacial period, ice core studies 1,2 have revealed strong coupling of the largest millennial-scale warm events in Antarctica with the longest Dansgaard - Oeschger events in Greenland 3-5 through the Atlantic meridional overturning circulation 6-8 . It has been unclear, however, whether the shorter Dansgaard - Oeschger events have counterparts in the shorter and less prominent Antarctic temperature variations, and whether these events are linked by the same mechanism. Here we present a glacial climate record derived from an ice core from Dronning Maud Land, Antarctica, which represents South Atlantic climate at a resolution comparable with the Greenland ice core records. After methane synchronization with an ice core from North Greenland 9 , the oxygen isotope record from the Dronning Maud Land ice core shows a one-to-one coupling between all Antarctic warm events and Greenland Dansgaard - Oeschger events by the bipolar seesaw 6 . The amplitude of the Antarctic warm events is found to be linearly dependent on the duration of the concurrent stadial in the North, suggesting that they all result from a similar reduction in the meridional overturning circulation. |
format |
Article in Journal/Newspaper |
author |
Barbante, C. Barnola, J.M. Becagli, S. Beer, J. Bigler, M. Boutron, C. Blunier, T. Castellano, E. Cattani, O. Chappellaz, J. Wolff, E. |
spellingShingle |
Barbante, C. Barnola, J.M. Becagli, S. Beer, J. Bigler, M. Boutron, C. Blunier, T. Castellano, E. Cattani, O. Chappellaz, J. Wolff, E. One-to-one coupling of glacial climate variability in Greenland and Antarctica |
author_facet |
Barbante, C. Barnola, J.M. Becagli, S. Beer, J. Bigler, M. Boutron, C. Blunier, T. Castellano, E. Cattani, O. Chappellaz, J. Wolff, E. |
author_sort |
Barbante, C. |
title |
One-to-one coupling of glacial climate variability in Greenland and Antarctica |
title_short |
One-to-one coupling of glacial climate variability in Greenland and Antarctica |
title_full |
One-to-one coupling of glacial climate variability in Greenland and Antarctica |
title_fullStr |
One-to-one coupling of glacial climate variability in Greenland and Antarctica |
title_full_unstemmed |
One-to-one coupling of glacial climate variability in Greenland and Antarctica |
title_sort |
one-to-one coupling of glacial climate variability in greenland and antarctica |
publisher |
Springer Nature |
publishDate |
2006 |
url |
https://doi.org/10.1038/nature05301 |
geographic |
Antarctic The Antarctic Dronning Maud Land Greenland |
geographic_facet |
Antarctic The Antarctic Dronning Maud Land Greenland |
genre |
Antarc* Antarctic Antarctica Dansgaard-Oeschger events Dronning Maud Land Greenland Greenland ice core ice core North Greenland |
genre_facet |
Antarc* Antarctic Antarctica Dansgaard-Oeschger events Dronning Maud Land Greenland Greenland ice core ice core North Greenland |
op_relation |
Nature--Nature--journals:2176--0028-0836--1476-4687 eawag:5356 journal id: journals:2176 issn: 0028-0836 e-issn: 1476-4687 ut: 000241867200038 local: 10839 scopus: 2-s2.0-33750882954 doi:10.1038/nature05301 |
op_doi |
https://doi.org/10.1038/nature05301 |
container_title |
Nature |
container_volume |
444 |
container_issue |
7116 |
container_start_page |
195 |
op_container_end_page |
198 |
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1766165757211705344 |