Seasonal temperature variability of the Neoglacial (3300-2500 BP) and Roman Warm Period (2500-1600 BP) reconstructed from oxygen isotope ratios of limpet shells (Patella vulgata), Northwest Scotland
Seasonal temperature variability of the Neoglacial (3300-2500 BP) and Roman Warm Period (2500-1600 BP) reconstructed from oxygen isotope ratios of limpet shells (Patella vulgata), Northwest Scotland
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DOI：
10.1016/j.palaeo.2011.12.016
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发表时间：
2012-02
期刊：
影响因子：
--
通讯作者：
Ting Wang;D. Surge;S. Mithen
中科院分区：
文献类型：
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作者：
Ting Wang;D. Surge;S. Mithen
新冰期（3300-2500BP）和罗马暖期（RWP；2500-1600BP）（分别对应于青铜时代和铁器时代）的季节性海面温度变化是利用从放射性碳测年的考古帽贝（Patella vulgata）贝壳微磨的高分辨率样品中获得的氧同位素比来估计的。新冰期贝壳记录的最冷冬季月份平均为 6.6±0.3°C，最热夏季月份平均为 14.7±0.4°C。一个新冰期贝壳捕捉到了没有夏天的一年，这可能是冰岛卡特拉火山系统火山喷发的尘埃覆盖造成的。 RWP 炮弹记录的冬季和夏季月平均温度分别为 6.3±0.1°C 和 13.3±0.3°C。这些结果捕捉到了从新冰川期到 RWP 的冷却转变，早期对苏格兰松树历史的研究、苏格兰东北部的花粉类型分析和欧洲冰川事件进一步支持了这一点。我们的研究中在新冰川和RWP之间的边界观察到的冷却转变也与2800-2700BP的气候突然恶化（也称为亚寒带/亚大西洋转变）一致，因此可能是由太阳辐射减少和北大西洋涛动条件减弱驱动的。
Seasonal sea-surface temperature variability for the Neoglacial (3300–2500BP) and Roman Warm Period (RWP; 2500–1600BP), which correspond to the Bronze and Iron Ages, respectively, was estimated using oxygen isotope ratios obtained from high-resolution samples micromilled from radiocarbon-dated, archaeological limpet (Patella vulgata) shells. The coldest winter months recorded in Neoglacial shells averaged 6.6±0.3°C, and the warmest summer months averaged 14.7±0.4°C. One Neoglacial shell captured a year without a summer, which may have resulted from a dust veil from a volcanic eruption in the Katla volcanic system in Iceland. RWP shells record average winter and summer monthly temperatures of 6.3±0.1°C and 13.3±0.3°C, respectively. These results capture a cooling transition from the Neoglacial to RWP, which is further supported by earlier studies of pine history in Scotland, pollen type analyses in northeast Scotland, and European glacial events. The cooling transition observed at the boundary between the Neoglacial and RWP in our study also agrees with the abrupt climate deterioration at 2800–2700BP (also referred to as the Subboreal/Subatlantic transition) and therefore may have been driven by decreased solar radiation and weakened North Atlantic Oscillation conditions.