Abstract Previous studies have suggested that the Late Glacial period (LG; ∼14 600–11 700 cal BP) was characterised by abrupt and extreme climate variability over the European sector of the North Atlantic. The limited number of precisely dated, high-resolution proxy records, however, restricts our understanding of climate dynamics through the LG. Here, we present the first annually-resolved tree-cellulose stable oxygen and carbon isotope chronology (δ18Otree, δ13Ctree) covering the LG between ∼14 050 and 12 795 cal BP, generated from a Swiss pine trees (P. sylvestris; 27 trees, 1255 years). Comparisons of δ18Otree with regional lake and ice core δ18O records reveal that LG climatic changes over the North Atlantic (as recorded by Greenland Stadials and Inter-Stadials) were not all experienced to the same degree in the Swiss trees. Possible explanations include: (1) LG climate oscillations may be less extreme during the summer in Switzerland, (2) tree-ring δ18O may capture local precipitation and humidity changes and/or (3) decayed cellulose and various micro-site conditions may overprint large-scale temperature trends found in other δ18O records. Despite these challenges, our study emphasises the potential to investigate hydroclimate conditions using subfossil pine stable isotopes.

中文翻译：

---

生长在晚冰期的瑞士亚化石松树的年度分辨率稳定同位素记录

摘要 先前的研究表明，晚冰期 (LG; ∼14 600–11 700 cal BP) 的特点是北大西洋欧洲部分突然和极端的气候变化。然而，精确日期的高分辨率代理记录数量有限，限制了我们通过 LG 对气候动态的理解。在这里，我们展示了第一个每年解析的树-纤维素稳定氧和碳同位素年表（δ18Otree，δ13Ctree），覆盖了约 14 050 和 12 795 cal BP 之间的 LG，由瑞士松树（P. sylvestris；27 棵树， 1255 年）。δ18Otree 与区域湖泊和冰芯 δ18O 记录的比较表明，北大西洋上的 LG 气候变化（如格陵兰体育场和 Inter-Stadials 记录的）在瑞士树中并非都经历了相同的程度。可能的解释包括：(1) 瑞士夏季的 LG 气候振荡可能不那么极端，(2) 树轮 δ18O 可能捕捉到当地降水和湿度变化和/或 (3) 腐烂的纤维素和各种微场地条件可能会叠加在其他 δ18O 记录中发现的大尺度温度趋势。尽管存在这些挑战，我们的研究强调了使用亚化石松稳定同位素研究水文气候条件的潜力。