Downcore and single benthic foraminiferal δ18O data from Cape Hatteras and Blake Outer Ridge during the last 25 ka BP@en

This dataset contains downcore benthic δ18O data from four cores at Cape Hatteras (for each core there is data from between one and three different benthic foraminifera species). Also included are single foraminiferal δ18O and δ13C measurements from Blake Outer Ridge core ODP-172-1054 during the LGM. Benthic foraminifera were picked from the >212 μm sediment size fraction, with samples typically consisting of between 5 and 15 specimens and weighing between 25 and 212 212 μg. Depending on sample size, stable isotope measurements were performed using a VG Isogas SIRA mass spectrometer with Multicarb preparation system (>80 μg) and a Thermo MAT253 isotope ratio mass spectrometer with Kiel IV carbonate preparation device (<80 μg) at the Godwin Laboratory, University of Cambridge. δ18O and δ13C are reported relative to the Vienna Peedee belemnite (VPDB) standard, and for both instruments analytical precision is estimated to be better than ±0.07 ‰ and ±0.04 ‰ respectively.本数据集包含哈特拉斯角（Cape Hatteras）4个岩芯的岩心底栖有孔虫（benthic foraminifera）δ18O数据，每个岩芯对应1至3种不同底栖有孔虫的检测数据。本数据集还包含末次盛冰期（Last Glacial Maximum, LGM）期间布雷克外海岭（Blake Outer Ridge）大洋钻探计划（Ocean Drilling Program, ODP）172航次1054站位岩芯中单个有孔虫的δ18O与δ13C测量数据。底栖有孔虫均挑选自粒径大于212微米的沉积物粒级组分，每份样品通常包含5至15个标本，总重量介于25至212微克。根据样品重量的不同，稳定同位素测试在剑桥大学戈德温实验室（Godwin Laboratory, University of Cambridge）完成：重量大于80微克的样品采用搭载Multicarb制样系统的VG Isogas SIRA质谱仪进行分析，重量小于80微克的样品则采用搭载Kiel IV碳酸盐制样装置的Thermo MAT253同位素比率质谱仪进行分析。δ18O与δ13C数据均以维也纳佩德北箭石（Vienna Peedee Belemnite, VPDB）标准为参照进行报告，两台仪器的分析精度分别优于±0.07‰与±0.04‰。