期刊
SCIENCE
卷 312, 期 5782, 页码 1929-1932出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1127213
关键词
-
资金
- Natural Environment Research Council [NE/C509107/1] Funding Source: researchfish
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 downwelting 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 takes associated with the decaying Laurentide Ice Sheet margin.
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