(Table 2) Age determination of sediments from the Nordic Seas

A combined record of three cores spanning the last 18 kyr from the northern North Sea is investigated for content of benthic and planktonic foraminifera and stable oxygen isotopes. The paleoenvironmental development through this time period shows an early deglaciation (18-14.4 ka) and the Younger Dr...

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Bibliographic Details
Main Authors: Klitgaard-Kristensen, Dorthe, Sejrup, Hans Petter, Haflidason, Haflidi
Format: Dataset
Language:English
Published: PANGAEA 2001
Subjects:
Age
14C AMS
14C calibrated
dated
dated material
dated standard deviation
Calendar age
Core_28-03
Depth
bottom/max
sediment/rock
top/min
Elevation of event
Event label
Laboratory code/label
Latitude of event
Longitude of event
North Sea
Reservoir age
Troll_89-3
Troll_91-1
Arctic
Foraminifera*
Nordic Seas
North Atlantic
Planktonic foraminifera
Sea ice
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.846598
https://doi.org/10.1594/PANGAEA.846598
Description
Summary:A combined record of three cores spanning the last 18 kyr from the northern North Sea is investigated for content of benthic and planktonic foraminifera and stable oxygen isotopes. The paleoenvironmental development through this time period shows an early deglaciation (18-14.4 ka) and the Younger Dryas (12.7-11.5 ka) characterized by arctic/polar conditions and increased ice rafting in the Norwegian Channel. During the Bølling-Allerød period, warm sea surface temperature (9°C) conditions similar to present conditions are inferred, while bottom waters stayed cold (0-1°C) with normal salinity. The Bølling-Allerød period is interrupted twice at 13.9-13.6 ka (Older Dryas) and at 13.0-12.8 ka (Inter-Allerød Cooling Period) by reductions in sea surface temperatures and increased sea ice cover. The beginning of the Holocene period is marked by increases in surface and bottom water temperature. Superimposed on the broad climatic changes through the Holocene, a series of short-lived oscillations in the ocean circulation are recorded. The amplitude of these Holocene events appears larger in the early Holocene (prior to 8 ka) than compared with the remaining part of the Holocene. This amplification can possibly be attributed to a general increased freshwater budget in the North Atlantic at this time during the final stages of the deglaciation of the Laurentide and Scandinavian ice sheets.

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