Calculated seawater d18O record of the sea surface (based on Globigerinoides ruber) corrected for global ice volume from 2.5 to 1 Ma@en

Measured stable oxygen isotopes measured on a surface dwelling (G.ruber) and deep dwelling foraminifera (G truncatulinoides) from a sediment core in the tropical Pacific retrieved during research cruise SO-225 to the Manihiki Plateau. Oxygen isotopes ratios of this dataset have been combined with previously published temperature reconstruction using Mg/Ca ratios (Raddatz et al. 2017, Raddatz et al 2019) to calculate the d18O of seawater through time (2.5 to 1.0 Ma) of the sea surface and deep thermocline. We also provide a surface and deep thermocline d18O-seawater record that has been correct for global ice volume using the modelled ice sheet evolution through the Quaternary by Bintanja and Van de Wal (2008).本数据集针对热带太平洋马尼希基海台（Manihiki Plateau）SO-225号科考航次（research cruise SO-225）获取的沉积物岩芯（sediment core）样品，对其中的表层浮游有孔虫（G. ruber）与深层浮游有孔虫（G. truncatulinoides）的稳定氧同位素（stable oxygen isotopes）组成进行了测定。本数据集的氧同位素比值与此前基于Mg/Ca比值（Mg/Ca ratios）发表的温度重建成果（Raddatz等，2017；Raddatz等，2019）相结合，用于计算2.5 Ma至1.0 Ma时段内海表与深层温跃层海水的d18O随时间演化序列。本研究同时提供了经Bintanja与Van de Wal（2008）建立的第四纪（Quaternary）冰盖演化模型校正全球冰量影响后的海表及深层温跃层海水d18O记录。