Hoogakker, Babette A A; McCave, I Nick; Elderfield, Henry; Hillaire-Marcel, Claude; Simstich, Johannes (2015): Holocene Labrador Sea planktonic foraminiferal oxygen isotopes and trace element data, and ice rafted debris percentage. PANGAEA, https://doi.org/10.1594/PANGAEA.856561, Supplement to: Hoogakker, BAA et al. (2015): Holocene climate variability in the Labrador Sea. Journal of the Geological Society, 172(2), 272-277, https://doi.org/10.1144/jgs2013-097
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Formation of Labrador Sea Water proper commenced about 7000 years ago during the Holocene interglacial. To test whether fresher surface water conditions may have inhibited Labrador Sea Water convection during the early Holocene we measured planktonic foraminiferal (Globigerina bulloides) oxygen isotopes (d18O) and Mg/Ca ratios at Orphan Knoll (cores HU91-045-093 and MD95-2024, 3488 m) in the Labrador Sea to reconstruct shallow subsurface summer conditions (temperature and seawater d18O). Lighter foraminiferal d18O values are recorded during the early Holocene between 11000 and 7000 years ago. Part of these lighter foraminiferal d18O values can be explained by increased calcification temperatures. Reconstructed seawater d18O values were, however, still on average 0.5 per mil lighter compared with those of recent times, confirming that fresher surface waters in the Labrador Sea were probably a limiting factor in Labrador Sea Water formation during the early Holocene.
Median Latitude: 50.207000 * Median Longitude: -45.687250 * South-bound Latitude: 50.206667 * West-bound Longitude: -45.688000 * North-bound Latitude: 50.208000 * East-bound Longitude: -45.687000
Date/Time Start: 1995-06-18T00:00:00 * Date/Time End: 1995-06-18T00:00:00
Datasets listed in this publication series
- Hoogakker, BAA; McCave, IN; Elderfield, H et al. (2015): Ice rafted debris in sediment core MD95-2024. https://doi.org/10.1594/PANGAEA.856559
- Hoogakker, BAA; McCave, IN; Elderfield, H et al. (2015): Planktonic foraminiferal oxygen isotopes and trace element data of sediment core HU91-045-093. https://doi.org/10.1594/PANGAEA.856560