(Table 1) Age determination of North Atlantic sediment cores ...

Stable isotope, trace metal, alkenone paleothermometry, and radiocarbon methods have been applied to sediment cores in the western subpolar North Atlantic between Hudson Strait and Cape Hatteras to reveal the history of climate in that region over the past ~11 kyr. We focus on cores from the Laurent...

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Bibliographic Details
Main Authors: Keigwin, Lloyd D, Sachs, Julian P, Rosenthal, Yair, Boyle, Edward A
Format: Dataset
Language:English
Published: PANGAEA 2005
Subjects:
Event label
Latitude of event
Longitude of event
Elevation of event
DEPTH, sediment/rock
Age, dated material
Age, dated
Age, dated standard error
Laboratory code/label
Calendar age
Age, maximum/old
Age, minimum/young
Piston corer
Trigger corer
Giant gravity corer
MultiCorer
Age, 14C AMS
Hudson
Hudson Strait
North Atlantic
Planktonic foraminifera
Online Access:https://dx.doi.org/10.1594/pangaea.837084
https://doi.pangaea.de/10.1594/PANGAEA.837084
Description
Summary:Stable isotope, trace metal, alkenone paleothermometry, and radiocarbon methods have been applied to sediment cores in the western subpolar North Atlantic between Hudson Strait and Cape Hatteras to reveal the history of climate in that region over the past ~11 kyr. We focus on cores from the Laurentian Fan, which is known to have rapid and continuous accumulation of hemipelagic sediment. Although results among our various proxy data are not always in agreement, the weight of the evidence (alkenone sea surface temperature (SST), d18O and abundance of Globigerinoides ruber) indicates a continual cooling of surface waters over Laurentian Fan, from about 18°C in the early Holocene to about 8°C today. Alternatively, Mg/Ca data on planktonic foraminifera indicate no systematic change in Holocene SST. The inferred long-term decrease in SST was probably driven by decreasing seasonality of Northern Hemisphere insolation. Two series of proxy data show the gradual cooling was interrupted by a two-step cold pulse that ... : Including data of Keigwin and Pickart (1999) on OCE326-MC13 and OCE326-MC25. ...

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