Prange, Matthias, Jonkers, Lukas, Merkel, Ute, Schulz, Michael 
ORCID: 0000-0001-6500-2697 and Bakker, Pepijn
(2023)
A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum.
Science advances, 9 (44).
eadh1106-eadh1106.
Abstract
Paleoclimate proxy records from the North Atlantic region reveal substantially greater multicentennial temperature variability during the Last Glacial Maximum (LGM) compared to the current interglacial. As there was no obvious change in external forcing, causes for the increased variability remain unknown. Exploiting LGM simulations with a comprehensive coupled climate model along with high-resolution proxy records, we introduce an oscillatory mode of multicentennial variability, which is associated with moderate variations in the Atlantic meridional overturning circulation and depends on the large-scale salinity distribution. This self-sustained mode is amplified by sea-ice feedbacks and induces maximum surface temperature variability in the subpolar North Atlantic region. Characterized by a distinct climatic imprint and different dynamics, the multicentennial oscillation has to be distinguished from Dansgaard-Oeschger variability and emerges only under full LGM climate forcing. The potential of multicentennial modes of variability to emerge or disappear in response to changing climate forcing may have implications for future climate change.
| Item Type: | Article |
|---|---|
| Divisions: | Faculty of Health and Life Sciences Faculty of Health and Life Sciences > Institute of Life Courses and Medical Sciences Faculty of Health and Life Sciences > Institute of Life Courses and Medical Sciences > School of Medicine |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 14 Dec 2023 08:39 |
| Last Modified: | 14 Dec 2023 08:43 |
| DOI: | 10.1126/sciadv.adh1106 |
| Open Access URL: | http://10.0.4.102/sciadv.adh1106 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3177351 |
Dimensions
Dimensions
