(Supplementary Table S1) Radiocarbon age of sediment core GeoB6518-1@en

Sample 5-15 cm could not be calibrated due to the presence of bomb-derived radiocarbon. Therefore, the core-top was set to zero age.由于存在核爆源放射性碳（bomb-derived radiocarbon），5~15 cm深度的样品无法进行定年校准。因此将该岩芯的表层年龄设为零。