Stable isotopes and sea surface temperature on planktic foraminifera of sediment core WIND 28K

• Main Authors: Kiefer, Thorsten, McCave, I Nick, Elderfield, Henry
• Format: Dataset
• Language: English
• Published: PANGAEA 2006
• Subjects: AGE; Calculated; Calculated from Mg/Ca ratios (Anand et al.; 2003); CD129; Charles Darwin; Cibicidoides wuellerstorfi; δ18O; DEPTH; sediment/rock; Foraminifera; planktic; mass per shell; Globigerinoides ruber white; Magnesium/Calcium ratio; δ13C; Graphite furnace atomic absorption spectrometer (GF-AAS); Isotope ratio mass spectrometry; KAL; Kasten corer; Neogloboquadrina dutertrei; Sea surface temperature; annual mean; SW Indian Ocean; Thermocline water temperature; WIND; WIND-28K; Antarc*; Antarctic
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.610271; https://doi.org/10.1594/PANGAEA.610271

We reconstructed the surface hydrography of the South Equatorial Current in the western Indian Ocean for the last 65,000 years using a marine sediment core record. Results show that tropical Indian Ocean temperatures resemble temperatures from Antarctic ice cores with warm and cold fluctuations synchronous with the Antarctic Cold Reversal and the Antarctic warm events A1–A4. The most likely thermal link involves Subantarctic Mode Water (SAMW) which forms north of the subpolar frontal zone and spreads northward into the Indian Ocean. This subsurface water mass is the prime suspect because of a stronger temperature response in the thermocline (recorded by the foraminifer N. dutertrei) than in surface water (G. ruber).