Ocean surface and bottom water conditions, iceberg drift and sediment transport on the North Iceland margin during MIS 3 and 2 ...

Radiocarbon dates and marine tephra suggest that the upper 10 m of core MD99-2274 off North Iceland extends from ~0 to ~65 ka BP. A multi-proxy sediment and biomarker study at a ~0.5 ky resolution is used to derive a paleoclimate scenario for this area of the southwestern Nordic Seas, which during t...

Full description

Bibliographic Details
Main Authors: Andrews, John T, Smik, Lukas, Belt, Simon T, Sicre, Marie-Alexandrine, McCave, I Nick
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA 2021
Subjects:
Alkenones
flow speeds
Mineral compositions
North Iceland Shelf
sea ice biomarker
Calypso Corer
MD114
Marion Dufresne 1995
Greenland
Greenland Sea
Hudson Strait
Iceland
Nordic Seas
Sea ice
Online Access:https://dx.doi.org/10.1594/pangaea.931154
https://doi.pangaea.de/10.1594/PANGAEA.931154
Description
Summary:Radiocarbon dates and marine tephra suggest that the upper 10 m of core MD99-2274 off North Iceland extends from ~0 to ~65 ka BP. A multi-proxy sediment and biomarker study at a ~0.5 ky resolution is used to derive a paleoclimate scenario for this area of the southwestern Nordic Seas, which during the Holocene had intermittent excursions of icebergs and a seasonal cover of drifting sea ice across the site. The sortable silt mean size (S̅S̅) suggests a bottom current (1000 m depth) flow speed maximum to minimum range of ~8 cm/s during Marine Isotope Stages 2 to 3, but the data are unreliable for the Holocene. Slow-down in flow speeds may be associated with massive ice and water discharges linked to the Hudson Strait ice stream (H-events) and to melt of icebergs from Greenland in the Nordic seas where convection would have been suppressed. Five pulses of sediment with a distinct felsic component are associated with iceberg transport from E/NE Greenland. Sea ice, open water and sea surface temperature (SST) ...

Similar Items