Atlantic water inflow to Labrador Sea and its interaction with ice sheet dynamics during the Holocene ...

The hydrodynamics of the Labrador Sea, controlled by the complex interplay of oceanographic, atmospheric and ice-sheet processes, play a crucial role for the Atlantic Meridional Overturning Circulation (AMOC). An improved understanding of the hydrodynamics and its forcing in the past could therefore...

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Bibliographic Details
Main Authors: Weiser, J, Titschack, J, Kienast, M, McCave, IN, Lochte, AA, Saini, J, Stein, R, Hebbeln, D
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier BV 2021
Subjects:
Sortable Silt
Current-speed reconstructions
AMOC
8.2-ka event
Greenland Ice Sheet
Labrador Sea
Baffin Bay
Greenland
Nuuk
Baffin
Ice Sheet
North Atlantic
Online Access:https://dx.doi.org/10.17863/cam.78849
https://www.repository.cam.ac.uk/handle/1810/331396
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Summary:The hydrodynamics of the Labrador Sea, controlled by the complex interplay of oceanographic, atmospheric and ice-sheet processes, play a crucial role for the Atlantic Meridional Overturning Circulation (AMOC). An improved understanding of the hydrodynamics and its forcing in the past could therefore hold a key to understanding its future behaviour. At present, there is a remarkable temporal mismatch, in that the largely microfossil-based reconstructions of Holocene Atlantic-water inflow/influence in the Labrador Sea and Baffin Bay appear to lag grain size-based current strength reconstructions from the adjacent North Atlantic by > 2ka. Here, we present the first current strength record from the West Greenland shelf off Nuuk to reconstruct Atlantic Water (AW)-inflow to the Labrador Sea via the West Greenland Current. Our data show that the Holocene AW-inflow into Labrador Sea is well aligned with the Holocene Speed Maximum documented in the North Atlantic (McCave and Andrews, 2019; Quat. Sci. Rev. 223), ...

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