Bulk, molecular and isotopic data from 2.1 to 0.6 Ma on southeastern Loess Plateau

We present magnetic susceptibility (SUS), abundance and carbon isotope composition of total organic carbon (TOC), BC abundance and br-GDGT-derived mean annual temperature (MAT) and mean annual precipitation (MAP) records over a glacial-interglacial scale during ~2.1-0.6 Ma from a loess/paleosol sequence at Shangchen (SC, 34°13′33″N, 109°28′39″E) and br-GDGT-derived MAT and MAP records in several loess/paleosol layers (L6, L9, L13, S14, S15, L22, S22, L25, S25, L26 and S26) from Duanjiapo (DJP, 34°11′15″N, 109°13′58″E) on southeastern Chinese Loess Plateau. Our data demonstrate four climate-vegetation periods during 2.1-0.6 Ma at SC, high climatic and environmental variability during the early mid-Pleistocene climate transition (MPT, ~1.26-0.9 Ma) at SC and a cooling and aridification trend since the beginning of MPT (~1.26 Ma) in this area. We assume the data can be used to reconstruct the paleoclimate and paleoenvironment during ~2.1-0.6 Ma on southeastern Chinese Loess Plateau.

本研究提供了中国黄土高原东南部上陈（SC，34°13′33″N，109°28′39″E）一处黄土-古土壤序列在约2.1~0.6 Ma冰期-间冰期尺度下的磁化率（magnetic susceptibility，简称SUS）、总有机碳（total organic carbon，简称TOC）丰度与碳同位素组成、黑炭（black carbon，简称BC）丰度，以及基于br-GDGT的年平均气温（mean annual temperature，简称MAT）和年平均降水量（mean annual precipitation，简称MAP）记录；同时涵盖段家坡（DJP，34°11′15″N，109°13′58″E）多套黄土-古土壤层位（L6、L9、L13、S14、S15、L22、S22、L25、S25、L26及S26）的br-GDGT衍生MAT与MAP记录。本研究数据显示，上陈地区在2.1~0.6 Ma期间存在四个气候-植被阶段，且在早中更新世气候转型期（mid-Pleistocene climate transition，简称MPT，约1.26~0.9 Ma）气候与环境变率显著；同时证实该区域自MPT起始（约1.26 Ma）以来呈现持续变冷与干旱化趋势。本研究认为，该数据集可用于重建中国黄土高原东南部约2.1~0.6 Ma时期的古气候与古环境。