(Table 1) Age determination of sediment core MD01-2390 ...

• Main Authors: Steinke, Stephan, Mohtadi, Mahyar, Groeneveld, Jeroen, Lin, Li-Chuan, Löwemark, Ludvig, Chen, Min-Te, Rendle-Bühring, Rebecca
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Laboratory code/label; DEPTH, sediment/rock; Age, dated material; Age, dated; Age, dated standard deviation; Calendar age; Age, minimum/young; Age, maximum/old; -; Laboratory; Giant piston corer; Age, 14C AMS; Age, 14C calibrated; MD122; Marion Dufresne 1995; International Marine Global Change Study IMAGES; Planktonic foraminifera
• Online Access: https://dx.doi.org/10.1594/pangaea.831542; https://doi.pangaea.de/10.1594/PANGAEA.831542

Upper water column dynamics in the southern South China Sea were reconstructed in order to track changes in the activity of the East Asian winter monsoon (EAWM) since the Last Glacial Maximum. We used the difference in the stable oxygen isotopes (Delta d18O) and Mg/Ca-based temperatures (Delta T) of surface-dwelling (G. ruber) and thermocline-dwelling (P. obliquiloculata) planktonic foraminifera and the temperature difference between alkenone- and P. obliquiloculata Mg/Ca-based temperatures to estimate the upper ocean thermal gradient at International Marine Past Global Change Study (IMAGES) core MD01-2390. Estimates of the upper ocean thermal gradient were used to reconstruct mixed layer dynamics. We find that ourDelta d18O estimates are biased by changes in salinity and, thus, do not display a true upper ocean thermal gradient. The Delta T of G. ruber and P. obliquiloculata as well as the alkenone and P. obliquiloculata suggest increased surface water mixing during the late glacial, likely due to enhanced ... : Samples measured at the Nagoya University Center for Chronological Research, Japan are published previously by Steinke et al. (2006). The 14C ages were calibrated using CALIB 5.0.1 and the marine 04.14c data set (Hughen et al., 2004) without a further adjustment for a regional 14C reservoir age (Delta R = deviation from the average global reservoir age of 400 years). ...