A multicentennial mode of North Atlantic climate variability throughout the Last Glacial Maximum.

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 b

SUBMITTER: Prange M 

PROVIDER: S-EPMC10619932 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature