Caillon, N.; Jouzel, J.; Severinghaus, J. P.; Chappellaz, J.; Blunier, T (2003). A novel method to study the phase relationship between Antarctic and Greenland climate. Geophysical Research Letters, 30(17), n/a-n/a. American Geophysical Union 10.1029/2003GL017838
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A classical method for understanding the coupling between northern and southern hemispheres during millennial-scale climate events is based on the correlation between Greenland and Antarctic ice core records of atmospheric composition. Here we present a new approach based on the use of a single Antarctic ice core in which measurements of methane concentration and inert gas isotopes place constraints on the timing of a rapid climate change in the North and of its Antarctic counterpart. We applied it to the Marine Isotope Stage (MIS) 5d/c transition early in the last glaciation ∼108 ky BP. Our results indicate that the Antarctic temperature increase occurred 2 ky before the methane increase, which is used as a time marker of the warming in the Northern Hemisphere. This result is in agreement with the “bipolar seesaw” mechanism used to explain the phase relationships documented between 23 and 90 ky BP [Blunier and Brook, 2001].
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
08 Faculty of Science > Physics Institute > Climate and Environmental Physics |
UniBE Contributor: |
Blunier, Thomas |
Subjects: |
500 Science > 530 Physics |
ISSN: |
0094-8276 |
Publisher: |
American Geophysical Union |
Language: |
English |
Submitter: |
BORIS Import 2 |
Date Deposited: |
06 Sep 2021 10:55 |
Last Modified: |
05 Dec 2022 15:52 |
Publisher DOI: |
10.1029/2003GL017838 |
BORIS DOI: |
10.48350/158449 |
URI: |
https://boris.unibe.ch/id/eprint/158449 |
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