(Table S1) Age determination of sediment cores from the Labrador Sea

High resolution flow speed reconstructions of two core sites located on Gardar Drift in the northeast Atlantic Basin and Orphan Knoll in the northwest Atlantic Basin reveal a long-term decrease in flow speed of Northeast Atlantic Deep Water (NEADW) after 6,500 years. Benthic foraminiferal oxygen iso...

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Bibliographic Details
Main Authors: Hoogakker, Babette A A, Chapman, Mark R, McCave, I Nick, Hillaire-Marcel, Claude, Ellison, Christopher RW, Hall, Ian R, Telford, Richard J
Format: Dataset
Language:English
Published: PANGAEA 2011
Subjects:
Age
14C AMS
calibrated
dated
dated material
dated standard deviation
maximum/old
minimum/young
BC
Box corer
Calendar age
CALYPSO
Calypso Corer
DEPTH
sediment/rock
Event label
HU91-045-093
IMAGES I
IMAGES V
Laboratory code/label
Labrador Sea
Marion Dufresne (1995)
MD101
MD114
MD952024
MD95-2024
MD99-2251
Orphan Knoll
Rockall
Norwegian Sea
Northeast Atlantic
Northwest Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.829499
https://doi.org/10.1594/PANGAEA.829499
Description
Summary:High resolution flow speed reconstructions of two core sites located on Gardar Drift in the northeast Atlantic Basin and Orphan Knoll in the northwest Atlantic Basin reveal a long-term decrease in flow speed of Northeast Atlantic Deep Water (NEADW) after 6,500 years. Benthic foraminiferal oxygen isotopes of sites currently bathed in NEADW show a 0.2per mil depletion after 6,500 years, shortly after the start of the development of a carbon isotope gradient between NEADW and Norwegian Sea Deep Water. We consider these changes in near-bottom flow vigor and benthic foraminiferal isotope records to mark a significant reorganization of the Holocene deep ocean circulation, and attribute the changes to a weakening of NEADW flow during the mid to late Holocene that allowed the shoaling of Lower Deep Water and deeper eastward advection of Labrador Sea Water into the northeast Atlantic Basin.

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