Radiocarbon data of bulk organic matter in permafrost from the Lena Delta, Arctic

This datasheet includes radiocarbon measurement results of bulk organic matter from permafrost collected from the Lena Delta. Sediments were freeze-dried, ground, and weighed into silver boats, with sample sizes determined by TOC content to target 1 mg of organic carbon. Samples were acidified with three drops of 6 M HCl at 60 °C three times with one hour reaction time between treatments, then oven-dried overnight at 60 °C. Afterwards, acidified samples together with silver boats were folded into tin boats and converted into graphite targets using an elemental analyzer (Elementar vario Isotope) coupled to an automated graphitization system (Ionplus AG, AGE-3). Radiocarbon measurements were conducted using the MIni CArbon Dating System (MICADAS) accelerator mass spectrometer at Alfred Wegener Institute (AWI) (Mollenhauer et al., 2021).本数据集包含从勒拿三角洲（Lena Delta）采集的永久冻土块状有机质的放射性碳测年结果。沉积物经冷冻干燥、研磨后，称取至银舟中，称样量依据总有机碳（Total Organic Carbon, TOC）含量调整，目标为1毫克有机碳。样品使用3滴6 mol/L盐酸（HCl）在60℃下进行三次酸化处理，每次处理间隔1小时，随后于60℃烘箱中过夜烘干。酸化后的样品连同银舟一同折叠入锡舟中，通过连接自动化石墨化系统（Ionplus AG, AGE-3）的元素分析仪（Elementar vario Isotope）转化为石墨靶材。放射性碳测量由阿尔弗雷德·魏格纳研究所（Alfred Wegener Institute, AWI）的微型碳定年系统（MIni CArbon Dating System, MICADAS）加速器质谱仪完成（Mollenhauer等，2021）。