Compilation of Mg/Ca ratios of Neogloboquadrina pachyderma (sinistral) and SST estimates from the northern North Atlantic

A map of estimated calcification temperatures of the planktic foraminifer Neogloboquadrina pachyderma sinistral (TNps) for the Nordic Seas and the northern North Atlantic for the Last Glacial Maximum was produced from oxygen isotopes with support of Mg/Ca ratios. To arrive at the reconstruction, sev...

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Bibliographic Details
Main Authors: Meland, Marius Y, Jansen, Eystein, Elderfield, Henry
Format: Dataset
Language:English
Published: PANGAEA 2005
Subjects:
100-7
2bis68Fgif
3280N
3664N/S
52-43
71-12
71-15
71-19
79-26
80-30
80-42
80-60
94-13
94-18
94-25
94-34
Arctic Ocean
ARK-VIII/3
BOFS10K
BOFS11882#4
BOFS11884#4
BOFS11886#2
BOFS11890#2
BOFS11896#1
BOFS11905#1
BOFS14K
BOFS17K
BOFS5K
BOFS7K
BOFS8K
Calculated
CALYPSO
Calypso Corer
Charles Darwin
D184
Depth
bottom/max
sediment/rock
top/min
Depth comment
Discovery (1962)
Elevation of event
ENAM9409
Event label
GC
Giant box corer
GIK23357-4
GKG
Arctic
Neogloboquadrina pachyderma
Nordic Seas
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.227397
https://doi.org/10.1594/PANGAEA.227397
Description
Summary:A map of estimated calcification temperatures of the planktic foraminifer Neogloboquadrina pachyderma sinistral (TNps) for the Nordic Seas and the northern North Atlantic for the Last Glacial Maximum was produced from oxygen isotopes with support of Mg/Ca ratios. To arrive at the reconstruction, several constraints concerning the plausible salinity and ?18O-fields were employed. The reconstruction indicates inflow of temperate waters in a wedge along the eastern border of the Nordic Seas and at least seasonally ice-free waters. The reconstruction from oxygen isotopes shows similarities with Mg/Ca based paleotemperatures in the southern and southeastern sector, while unrealistically high Mg/Ca values in the central Nordic Seas prevent the application of the method in this area. The oxygen isotope based reconstruction shows some agreement with temperature reconstructions based on the modern analogue technique, but with somewhat lower temperatures and a stronger internal gradient inside the Nordic Seas. All told, our results suggest a much more ice-free and dynamic high latitude ocean than the CLIMAP reconstruction.

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