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Journal articles
Reduced north Atlantic deep water coeval with the glacial lake Agassiz freshwater outburst
Abstract : An outstanding climate anomaly 8200 years before the present (B.P.) in the North Atlantic is commonly postulated to be the result of weakened overturning circulation triggered by a freshwater outburst. New stable isotopic and sedimentological records from a northwest Atlantic sediment core reveal that the most prominent Holocene anomaly in bottom-water chemistry and flow speed in the deep limb of the Atlantic overturning circulation begins at ∼8.38 thousand years B.P., coeval with the catastrophic drainage of Lake Agassiz. The influence of Lower North Atlantic Deep Water was strongly reduced at our site for ∼100 years after the outburst, confirming the ocean's sensitivity to freshwater forcing. The similarities between the timing and duration of the pronounced deep circulation changes and regional climate anomalies support a causal link.
https://hal-cea.archives-ouvertes.fr/cea-00817389
Contributor : Bruno Savelli Connect in order to contact the contributor
Submitted on : Wednesday, April 24, 2013 - 3:07:27 PM
Last modification on : Wednesday, October 20, 2021 - 3:47:05 AM
Contributor : Bruno Savelli Connect in order to contact the contributor
Submitted on : Wednesday, April 24, 2013 - 3:07:27 PM
Last modification on : Wednesday, October 20, 2021 - 3:47:05 AM