(Table 1) Age determination of sediment profile JM96-1225

The paleoceanography in the Denmark Strait, North Atlantic, is reconstructed based on down core analysis of planktonic foraminifera, carbon and oxygen isotopes, carbonate, and ice rafted debris (IRD). The stratigraphy spans 57 to 6 calibrated (cal) ka years and reveals sea surface temperatures that...

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Bibliographic Details
Main Authors: Hagen, Sveinung, Hald, Morten
Format: Dataset
Language:English
Published: PANGAEA 2002
Subjects:
Age
14C AMS
14C calibrated
14C milieu/reservoir corrected (-400 yr)
dated
dated material
dated standard error
Calendar age
Core
Depth
bottom/max
sediment/rock
top/min
GC
Gravity corer
Jan Mayen
JM96
JM96-1225/1-GC
Laboratory code/label
Greenland
Denmark Strait
Greenland ice core
ice core
Iceland
North Atlantic Deep Water
North Atlantic
Planktonic foraminifera
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.842445
https://doi.org/10.1594/PANGAEA.842445
Description
Summary:The paleoceanography in the Denmark Strait, North Atlantic, is reconstructed based on down core analysis of planktonic foraminifera, carbon and oxygen isotopes, carbonate, and ice rafted debris (IRD). The stratigraphy spans 57 to 6 calibrated (cal) ka years and reveals sea surface temperatures that covary with Greenland ice core temperatures throughout marine isotope stages (MIS) 3 and 2. Planktonic d18O minima, interpreted as meltwater events, follow sea surface warming. IRD from both the Greenland and Iceland Ice Sheets was delayed by ~2 ka relative to the North Atlantic Heinrich events. Ventilation of bottom water was mostly sustained through open ocean convection associated with North Atlantic Deep Water production or by convection of glacial North Atlantic Intermediate Water, except for two episodes at ~54 cal ka (MIS 3.31) and 18–15 cal ka (termination I). During these two periods we suggest that deep water ventilation was accomplished mainly by brine formation.

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