d18O of Globigerina bulloides from sediment core MD01-2444 on the Portuguese Margin, Marine Isotope Stage 3 ...

• Main Authors: Tzedakis, Polychronis C, Margari, Vasiliki, Skinner, Luke C, Menviel, Laurie, Capron, Emilie, Rhodes, Rachael H, Mleneck-Vautravers, Maryline J, Ezat, Mohamed M, Martrat, Belén, Grimalt, Joan O, Hodell, David A
• Format: Dataset
• Language: English
• Published: PANGAEA 2020
• Subjects: Heinrich Stadials; Interstadials; MIS 3; Portuguese Margin; DEPTH, sediment/rock; Age model; Globigerina bulloides, δ18O; Calypso Corer; Age model, GICC05; Age model, WD2014; Mass spectrometer VG SIRA; MD123; Marion Dufresne 1995; Greenland; ice core; NGRIP; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.919829; https://doi.pangaea.de/10.1594/PANGAEA.919829

Planktonic foraminifera (G. bulloides) oxygen isotopes: Measurements of foraminiferal stable isotopes were carried out in the Godwin Laboratory for Palaeoclimate Research (University of Cambridge), using a VG SIRA mass spectrometer. Analyses were made on samples consisting of 30 specimens of G. bulloides in the 300-355 mm size fraction, picked by M.J. Mleneck-Vautravers. Results are reported with reference to the international standard VPDB and the precision is better than ±0.08‰ for d18O. Age model: The age model was developed by aligning the abrupt transitions of d18O record of G. bulloides in core MD01-2444 to warming and cooling events in the NGRIP d18Oice record, presented on: (i) the GICC05 timescale [Svensson, A. et al. A 60,000 year Greenland stratigraphic ice core chronology. Clim. Past 4, 47–57 (2008)]; and (ii) the WD2014: modified timescale, whereby NGRIP GICC05 ice ages 31.2–67.2 ka are multiplied by 1.0063. [Buizert, C. et al. The WAIS Divide deep ice core WD2014 chronology – Part 1: Methane ...