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Telesiński, Maciej Mateusz; Bauch, Henning A; Spielhagen, Robert F (2018): Planktic and benthic stable oxygen and carbon isotope, IRD, planktic foraminifera data and sand fraction content of sediment core PS1904-2. PANGAEA, https://doi.org/10.1594/PANGAEA.895535, Supplement to: Telesiński, MM et al. (2018): Causes and consequences of Arctic freshwater routing into the Nordic Seas during late Marine Isotope Stage 5. Journal of Quaternary Science, 33(7), 794-803, https://doi.org/10.1002/jqs.3060

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Abstract:
Sediment core PS1904 reveals continuous records of planktic and benthic foraminiferal stable isotopes (d18O/d13C) from the north-eastern Greenland continental margin. The data show good comparability with other records from the Nordic Seas, allowing the stratigraphic range of PS1904 to be dated to Marine Isotope Stage (MIS) 6. Focusing on MIS 5 reveals light d18O values during MIS 5a compared to the last interglacial peak (MIS 5e) which indicates that surface and bottom water layers were strongly affected by freshwater during the former event. We present two possible scenarios explaining the origin and routing of the freshwater: (i) drainage of a Eurasian proglacial lake coupled with the collapse of the Kara Sea Ice Sheet at the MIS 5b/a boundary, and (ii) destabilization and melting of the nearby Greenland Ice Sheet. Although both scenarios could have acted simultaneously, sediment records from the Eurasian sector of the Arctic Ocean hint at the proglacial lake system in north-western Siberia as the largest freshwater source. Regardless of the actual source, the freshwater lowered the surface ocean salinity causing water column stratification and sea ice expansion. Increased sea-ice abundance led to a higher albedo and probably contributed to the cooling and global ice sheet growth that occurred subsequently during MIS 4.
Coverage:
Latitude: 77.087000 * Longitude: -3.990000
Date/Time Start: 1990-07-02T00:00:00 * Date/Time End: 1990-07-02T00:00:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 2.285 m
Event(s):
PS1904-2 (GIK21904-2 PS17/079) * Latitude: 77.087000 * Longitude: -3.990000 * Date/Time: 1990-07-02T00:00:00 * Elevation: -1767.0 m * Penetration: 4.4 m * Recovery: 4.35 m * Location: Greenland Sea * Campaign: ARK-VII/1 (PS17) * Basis: Polarstern * Device: Kasten corer (KAL)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmTelesiński, Maciej MateuszGeocode
2Neogloboquadrina pachyderma, δ18ON. pachyderma δ18O‰ PDBTelesiński, Maciej MateuszMass spectrometer Finnigan MAT 253size fraction 125-500 µm
3Neogloboquadrina pachyderma, δ13CN. pachyderma δ13C‰ PDBTelesiński, Maciej MateuszMass spectrometer Finnigan MAT 253size fraction 125-500 µm
4Oridorsalis umbonatus, δ18OO. umbonatus δ18O‰ PDBTelesiński, Maciej MateuszMass spectrometer Finnigan MAT 253size fraction 125-500 µm
5Oridorsalis umbonatus, δ13CO. umbonatus δ13C‰ PDBTelesiński, Maciej MateuszMass spectrometer Finnigan MAT 253size fraction 125-500 µm
6Ice rafted debrisIRD#/gTelesiński, Maciej MateuszCounting >250 µm fraction
7Ice rafted debrisIRD%Telesiński, Maciej MateuszCounting >250 µm fractionclastic
8Foraminifera, planktic, subpolarForam plankt subpolar%Telesiński, Maciej MateuszCounting 125-250 µm fraction
9Foraminifera, plankticForam plankt#/gTelesiński, Maciej MateuszCounting 125-250 µm fraction
10Size fraction > 0.063 mm, sand>63 µm%Telesiński, Maciej Mateusz
Size:
1143 data points

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