Planktonic d18O and Mg/Ca ratios and sea seawater temperature reconstructions of sediment core SK218-1

Radiocarbon ages measured on planktonic foraminifera Globigerinoides ruber alba and stable oxygen isotope and Mg/Ca ratios measured on the same species. For Mg/Ca and d18O measurements shells from the 250-350 micrometer size fraction were used. Mg/Ca measurements are based on 30-40 shells that were cleaned using an oxidative cleaning step. Seawater temperature estimates were calculated using the T = ln(Mg/Ca/0.09)/0.38 following 10.1029/2001GC000200.

本数据集包含针对浮游有孔虫（planktonic foraminifera）红拟抱球虫白色亚种（Globigerinoides ruber alba）壳体测得的放射性碳年代数据，以及同一物种的稳定氧同位素比值与Mg/Ca比值数据。针对Mg/Ca比值与δ¹⁸O的测量，实验选取了粒级为250~350微米的壳体样品。Mg/Ca比值的测量共使用30~40枚经氧化清洗步骤处理的壳体。海水温度估算值通过公式 T = ln(Mg/Ca/0.09)/0.38 计算得出，计算方法参照文献DOI 10.1029/2001GC000200。