Ocean water temperatures from ODP Site 130-806@en

The dataset compiles reconstructed changes in bottom water temperature and global ice volume from 0 to 17 Ma using δ18O in conjunction with Mg/Ca records of the infaunal benthic foraminifer, O. umbonatus from Ocean Drilling Program (ODP) Site 130-806 (equatorial Pacific; ~2500 m). This dataset covers the middle Miocene to present (17-0 Ma) and has an average temporal resolution of ~0.2 Ma. Application of the new equations to the Site 130-806 record leads to the suggestion that global ice volume was greater than today after the Middle Miocene Climate Transition (~14 Ma). ODP Site 130-806 bottom waters cooled and freshened as the Pacific zonal sea surface temperature gradient increased, and climate cooled through the Pliocene, prior to the Plio‐Pleistocene glaciation of the Northern Hemisphere.本数据集整合了基于氧同位素δ¹⁸O与镁钙比（Mg/Ca）记录重建的0~17 Ma间的底层海水温度及全球冰量变化，数据取自赤道太平洋130-806号大洋钻探计划（Ocean Drilling Program, ODP）站位（水深约2500 m）的底内底栖有孔虫O. umbonatus。本数据集覆盖中新世中期至现代（17~0 Ma），平均时间分辨率约为0.2 Ma。将新定量公式应用于130-806站位的记录后，研究结果显示，中新世中期气候转型期（约14 Ma）之后的全球冰量曾高于现今。随着太平洋纬向海表温度梯度升高，该站位的底层海水出现降温与淡化现象；在北半球上新世-更新世冰期发生前，上新世时期气候整体持续变冷。