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 studies1,2 have revealed strong coupling of the largest millennial-scale warm events in Antarctica with the longes...
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ftdatacite:10.48350/20736 2023-05-15T13:44:13+02:00 One-to-one coupling of glacial climate variability in Greenland and Antarctica Bigler, Matthias Blunier, Thomas Federer, Urs Hutterli, Manuel Johnsen, Sigfus Kaufmann, Patrik Lambert, Fabrice Leuenberger, Markus Lüthi, Dieter Schwander, Jakob Siegenthaler, Urs Spahni, Renato Stocker, Thomas EPICA Community, Members 2006 https://dx.doi.org/10.48350/20736 https://boris.unibe.ch/20736/ unknown Macmillan Journals Ltd. https://dx.doi.org/10.1038/nature05301 restricted access publisher holds copyright http://purl.org/coar/access_right/c_16ec journal article article-journal Text ScholarlyArticle 2006 ftdatacite https://doi.org/10.48350/20736 https://doi.org/10.1038/nature05301 2022-02-08T16:39:48Z 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 studies1,2 have revealed strong coupling of the largest millennial-scale warm events in Antarctica with the longest Dansgaard–Oeschger events in Greenland3,4,5 through the Atlantic meridional overturning circulation6,7,8. 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 Greenland9, 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 seesaw6. 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. Text Antarc* Antarctic Antarctica Dansgaard-Oeschger events Dronning Maud Land Greenland Greenland ice core ice core DataCite Metadata Store (German National Library of Science and Technology) Antarctic The Antarctic Dronning Maud Land Greenland |
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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 studies1,2 have revealed strong coupling of the largest millennial-scale warm events in Antarctica with the longest Dansgaard–Oeschger events in Greenland3,4,5 through the Atlantic meridional overturning circulation6,7,8. 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 Greenland9, 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 seesaw6. 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 |
Text |
author |
Bigler, Matthias Blunier, Thomas Federer, Urs Hutterli, Manuel Johnsen, Sigfus Kaufmann, Patrik Lambert, Fabrice Leuenberger, Markus Lüthi, Dieter Schwander, Jakob Siegenthaler, Urs Spahni, Renato Stocker, Thomas EPICA Community, Members |
spellingShingle |
Bigler, Matthias Blunier, Thomas Federer, Urs Hutterli, Manuel Johnsen, Sigfus Kaufmann, Patrik Lambert, Fabrice Leuenberger, Markus Lüthi, Dieter Schwander, Jakob Siegenthaler, Urs Spahni, Renato Stocker, Thomas EPICA Community, Members One-to-one coupling of glacial climate variability in Greenland and Antarctica |
author_facet |
Bigler, Matthias Blunier, Thomas Federer, Urs Hutterli, Manuel Johnsen, Sigfus Kaufmann, Patrik Lambert, Fabrice Leuenberger, Markus Lüthi, Dieter Schwander, Jakob Siegenthaler, Urs Spahni, Renato Stocker, Thomas EPICA Community, Members |
author_sort |
Bigler, Matthias |
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 |
Macmillan Journals Ltd. |
publishDate |
2006 |
url |
https://dx.doi.org/10.48350/20736 https://boris.unibe.ch/20736/ |
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 |
genre_facet |
Antarc* Antarctic Antarctica Dansgaard-Oeschger events Dronning Maud Land Greenland Greenland ice core ice core |
op_relation |
https://dx.doi.org/10.1038/nature05301 |
op_rights |
restricted access publisher holds copyright http://purl.org/coar/access_right/c_16ec |
op_doi |
https://doi.org/10.48350/20736 https://doi.org/10.1038/nature05301 |
_version_ |
1766198913186922496 |