In 2018 Pearson et al. published a new sequence of annual radiocarbon (14C) data derived from oak (Quercus sp.) trees from Northern Ireland and bristlecone pine (Pinus longaeva) from North America across the period 1700–1500 BC. The study indicated that the more highly resolved shape of an annually based calibration dataset could improve the accuracy of 14C calibration during this period. This finding had implications for the controversial dating of the eruption of Thera in the Eastern Mediterranean. To test for interlaboratory variation and improve the robustness of the annual dataset for calibration purposes, we have generated a replicate sequence from the same Irish oaks at ETH Zürich. These data are compatible with the Irish oak 14C dataset previously produced at the University of Arizona and are used (along with additional data) to examine inter-tree and interlaboratory variation in multiyear annual 14C time-series. The results raise questions about regional 14C offsets at different scales and demonstrate the potential of annually resolved 14C for refining subdecadal and larger scale features for calibration, solar reconstruction, and multiproxy synchronization.

中文翻译：

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公元前 1700 年至公元前 1480 年间大气 14C 的年变化

2018 年，皮尔逊等人。发表了新的年度放射性碳序列（14C) 来自橡木的数据 (栎属sp.) 来自北爱尔兰的树木和刺尾松 (长叶松) 公元前 1700-1500 年间来自北美。该研究表明，基于年度校准数据集的更高分辨率的形状可以提高14在此期间进行 C 校准。这一发现对东地中海锡拉火山爆发的有争议的年代产生了影响。为了测试实验室间变异并提高年度数据集的稳健性以用于校准目的，我们从苏黎世联邦理工学院的相同爱尔兰橡树中生成了一个复制序列。这些数据与爱尔兰橡木兼容14C 数据集以前在亚利桑那大学制作，用于（连同其他数据）检查多年年度的树间和实验室间变化14C 时间序列。结果提出了有关区域的问题14C 不同规模的抵消，并展示了每年解决的潜力14C 用于细化用于校准、太阳重建和多代理同步的亚年代际和更大规模的特征。