Foraminifera boron isotope, sea surface temperature, salinity, pH and pCO2 data from the eastern Arabian Sea during the last glacial-interglacial interval

Data presented here are trace-elements and boron isotope composition of planktic foraminifera G. ruber (250-355 μm) along with reconstructed surface ocean temperature, salinity, pH and pCO2 for the past 136 Ka from the south-eastern Arabian Sea. Foraminifera cleaning was carried out using the method adopted from Barker et al. 2003. Boron was purified using the micro-distillation method (Misra et al., 2014a). Trace-element analysis (e.g. Mg/Ca) was carried out using the High-Resolution Inductively Coupled Plasma Mass Spectrometer (HR-ICPMS) (Misra et al., 2014b). Boron isotope analysis was carried out using Thermo Neptune Plus multi-collector inductively coupled plasma mass spectrometer (MC–ICPMS), following the method described in Tarique et al. 2021, and Lloyd et al. 2018. Sea surface temperature (SST) was calculated using the foraminifera Mg/Ca utilizing the method adapted from Gray and Evans 2019. Sea surface salinity (SSS) was calculated using the Mg/Ca derived SST, foraminifera d18O and regional seawater d18O and salinity relationship.

本数据集呈现了阿拉伯海东南部过去136千年间，浮游有孔虫G. ruber（250-355 μm）的微量元素与硼同位素组成，以及重建的表层海水温度、盐度、pH值和pCO₂数据。有孔虫的清洗采用Barker等人（2003）的方法进行。硼的纯化采用微蒸馏法（Misra等人，2014a）。微量元素分析（如Mg/Ca）通过高分辨率电感耦合等离子体质谱仪（High-Resolution Inductively Coupled Plasma Mass Spectrometer，HR-ICPMS）完成（Misra等人，2014b）。硼同位素分析采用Thermo Neptune Plus多接收电感耦合等离子体质谱仪（multi-collector inductively coupled plasma mass spectrometer，MC–ICPMS），方法遵循Tarique等人（2021）及Lloyd等人（2018）所述。表层海水温度（Sea Surface Temperature，SST）通过有孔虫的Mg/Ca值计算得出，方法改编自Gray与Evans（2019）。表层海水盐度（Sea Surface Salinity，SSS）的计算基于Mg/Ca推导的SST、有孔虫的d¹⁸O值以及区域海水d¹⁸O与盐度的关系。