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- W2910181957 abstract "Abstract The Labrador Sea is a vital region for the Atlantic Meridional Overturning Circulation (AMOC), where overflow waters from the Nordic Seas mix with locally produced Labrador Sea Water (LSW), before exiting to the interior of the Atlantic Ocean. The dynamical sedimentary proxy of mean sortable silt size ( SS ¯ ) can give information on past changes in deep water circulation speed and the strength of AMOC. We have produced SS ¯ records from two core sites at depths between 1500 and 2000 m on the continental slope east of Newfoundland, to reconstruct changes in intermediate depth water circulation speed, including Glacial North Atlantic Intermediate Water and Labrador Sea Water over the past 22,000 years. Increases in SS ¯ appear to coincide with much of the deglaciation as well as the mid-late Holocene. End-member modeling suggests that ice-rafted debris (IRD) is an important factor in interpreting SS ¯ during the deglaciation. We find that a robust increase in SS ¯ is likely unrelated to IRD during the past 5 ka, and probably reflects increased flow at intermediate depths due to local production of LSW strengthening as Nordic Seas overflows weakened at this depth. Our results highlight both the complications of producing SS ¯ records in IRD-rich, slope environments and the promise that this proxy nevertheless has for reconstructing dynamical changes in deep ocean currents." @default.
- W2910181957 created "2019-01-25" @default.
- W2910181957 creator A5000724469 @default.
- W2910181957 creator A5036869546 @default.
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- W2910181957 date "2019-02-01" @default.
- W2910181957 modified "2023-10-01" @default.
- W2910181957 title "Sortable silt records of intermediate-depth circulation and sedimentation in the Southwest Labrador Sea since the Last Glacial Maximum" @default.
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- W2910181957 doi "https://doi.org/10.1016/j.quascirev.2018.12.028" @default.
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