Publication Date:
2023-06-27
Description:
Evidence from a North Atlantic deep-sea sediment core reveals that the largest climatic perturbation in our present interglacial, the 8200-year event, is marked by two distinct cooling events in the subpolar North Atlantic at 8490 and 8290 years ago. An associated reduction in deep flow speed provides evidence of a significant change to a major downwelling limb of the Atlantic meridional overturning circulation. The existence of a distinct surface freshening signal during these events strongly suggests that the sequenced surface and deep ocean changes were forced by pulsed meltwater outbursts from a multistep final drainage of the proglacial lakes associated with the decaying Laurentide Ice Sheet margin.
Keywords:
Age, 14C AMS; Age, calibrated; Age, dated; Age, dated standard deviation; Age, maximum/old; Age, minimum/young; Calendar age; CALYPSO; Calypso Corer; DEPTH, sediment/rock; IMAGES V; Laboratory code/label; Marion Dufresne (1995); MD114; MD99-2251; Rockall
Type:
Dataset
Format:
text/tab-separated-values, 138 data points
Permalink
