A 125-ka record of South American precipitation and the role of the bipolar 2 seesaw during Dansgaard-Oeschger events

• Main Authors: Anastasia Zhruavleva, Matthias Hüls, Ralf Tiedemann, Henning A. Bauch
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: Zenodo 2021
• Subjects: Dansgaard-Oeschger events
• Online Access: https://doi.org/10.5281/zenodo.4590356

X-ray fluorescence data (Ti/Ca and Zr/Rb ratios) were obtained using the Aavatech XRF Core Scanner at University Kiel in two runs (10 kv, 750 mA, 10 seconds and 30 kv, 2000 mA, 20 seconds). Elemental intensities were measured every 1 cm between 0-18.83 m and 0.5 cm between 18.84-22 m (revised depth). The carbonate content was calculated as CaCO3=8.33x(TC-TOC) using LECO analyzer. Samples were taken at 20cm throughout the upper ~10.4 m of the core and at 5 cm between 10.4-22 m (revised depth). Stable isotope ratios in planktic foraminifera were measured every 20 cm for the upper 0-18.5 m and every 10 cm between 18.5-22 cm (revised depth). Note that the original core depth scale in core MD99-2198 was modified by excluding two intervals (10.06-10.24 m and 13.78-14.30 m), representing episodes where the core was ripped apart, as could be concluded on the basis of large increases in porosity.