CGRG Bibliography of Canadian Geomorphology
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Author : Ellison, C.R.W.; Chapman, M.R.; and Hall, I.R.
Date : 2006.
Title : Surface and deep ocean interactions during the cold climate event 8200 years ago.
Publication : Science
Issue : 312(5782):
Page(s) : 1929-1932.



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Abstract

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.

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Bibliography of Canadian Geomorphology