Age model and linear sedimentation rates of sediment core PS115/2_2@en

Sediment Core PS115/2-2 was recovered from the Amundsen Basin in 3600 m water depth at the eastern flank of the Gakkel Ridge during Polarstern Expedition PS115/2 in 2018 (Stein, 2019). The well-dated core is used to reconstruct in detail the interrelationship between ice-sheet dynamics and organic carbon burial in the central Eurasian Basin during the last 430 kyr, and to correlate marine and terrestrial records of the Eurasian Ice Sheet (EIS) history. Our age model, a fundamental prerequisite for any kind of paleoclimatic reconstruction, is based on records of the inclination and relative paleointensity (RPI) of the Earth's magnetic field approved by rock magnetic data, 230Th and 231Pa excess (230Thex and 231Paex) records, and AMS14C ages. The listed tie points are used to develop the age model and to calculate linear sedimentation rates. For details and methods, we refer to Stein et al. (this paper).沉积物岩芯PS115/2-2采自阿蒙森海盆（Amundsen Basin），该站位位于加克海岭（Gakkel Ridge）东侧侧翼，水深3600米，由2018年极地星号（Polarstern）科考航次PS115/2获取（Stein, 2019）。该定年控制良好的岩芯可用于精细重建过去43万年以来欧亚海盆中部冰盖动力学与有机碳埋藏的相互关系，同时可用于对比欧亚冰盖（Eurasian Ice Sheet, EIS）演化历史的海洋与陆地记录。本研究的年龄模型是各类古气候重建的核心前提，其构建基于经岩石磁学数据验证的地球磁场倾角与相对古强度（Relative Paleointensity, RPI）记录、钍-230过剩（230Thex）与镤-231过剩（231Paex）记录，以及加速器质谱碳-14（AMS14C）测年数据。文中所列的定年控制点被用于构建年龄模型并计算线性沉积速率。有关实验细节与研究方法，可参考Stein等人（本论文）的相关内容。