Abstract The Late Devensian Lateglacial to early Holocene transition across north-west Europe was characterized by a rapid shift in climate from the cold, harsh conditions of the Loch Lomond Stadial to the warmer climate of the early postglacial. However, our knowledge of this transition in south-east England has been hampered by the paucity of mires with sedimentary records spanning this period. We present two new high-resolution paleoenvironmental records from Langshot Bog and Elstead Bog B (Surrey, UK), which provide a clear signature of vegetation succession and fire history. Organic sedimentation at Langshot Bog commenced prior to 12,640–12,410 cal. BP (95% probability) and continued until 8430–8350 cal. BP (95% probability). Providing a robust chronology for Elstead Bog B proved to be problematic, although available dates suggest sediment accumulation commenced prior to 11,820–11,400 cal. BP (WM-168, 2σ). The sites are characterized by similar vegetation records, indicating a regional signal from locations over 20 km apart. Scrubby tundra-style vegetation is characteristic of cold conditions associated with the Lateglacial. The identification of Alnus and Corylus, taxa not normally associated with this period, indicates that microclimates may have permitted the survival of these species. Expansion of Betula followed by Pinus dates to the onset of the Holocene, forming mixed coniferous-deciduous woodland, during a period which is punctuated by short climatic events identified from stable isotope analysis. Subsequent expansion of thermophilous taxa Corylus, Ulmus and Quercus results in the formation of deciduous woodland. A rise in micro-charcoal, heathland and herbaceous taxa indicates development of heathy-scrubby clearings within this Holocene landscape.

中文翻译：

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对晚泥盆世晚冰期和全新世早期环境变化的新见解：来自英格兰东南部的两个高分辨率案例研究

摘要 欧洲西北部晚泥盆世晚冰期向全新世早期过渡的特点是气候从洛蒙德湖体育场寒冷、恶劣的条件迅速转变为早冰期后温暖的气候。然而，我们对英格兰东南部这种转变的了解受到了跨越这一时期沉积记录的泥沼稀少的阻碍。我们展示了来自 Langshot Bog 和 Elstead Bog B（英国萨里）的两个新的高分辨率古环境记录，它们提供了植被演替和火灾历史的清晰特征。Langshot Bog 的有机沉积在 12,640-12,410 卡路里之前开始。BP（概率为 95%）并持续到 8430-8350 卡路里。BP（95% 的概率）。为 Elstead Bog B 提供可靠的年表被证明是有问题的，尽管可用日期表明沉积物在 11,820-11,400 卡路里之前开始积累。BP (WM-168, 2σ)。这些站点的特征是类似的植被记录，表明来自相距 20 公里以上的位置的区域信号。粗糙的苔原风格植被是与晚冰期相关的寒冷条件的特征。Alnus 和 Corylus（通常与这一时期无关的分类群）的鉴定表明小气候可能允许这些物种生存。Betula 和 Pinus 的扩张可以追溯到全新世的开始，形成混合的针叶-落叶林地，期间被稳定同位素分析确定的短气候事件所打断。随后嗜热类群 Corylus、Ulmus 和 Quercus 的扩张导致落叶林地的形成。