New tree-ring evidence for the Late Glacial period from the northern pre-Alps in eastern Switzerland
New tree-ring evidence for the Late Glacial period from the northern pre-Alps in eastern Switzerland
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DOI：
10.1016/j.quascirev.2018.02.019
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发表时间：
2018-04
影响因子：
4
通讯作者：
F. Reinig;D. Nievergelt;J. Esper;Michael Friedrich;G. Helle;L. Hellmann;B. Kromer;Sandro Morganti;M. Pauly;A. Sookdeo;Willy Tegel;K. Treydte;A. Verstege;L. Wacker;U. Büntgen
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文献类型：
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作者：
F. Reinig;D. Nievergelt;J. Esper;Michael Friedrich;G. Helle;L. Hellmann;B. Kromer;Sandro Morganti;M. Pauly;A. Sookdeo;Willy Tegel;K. Treydte;A. Verstege;L. Wacker;U. Büntgen
从末次冰盛期过渡到全新世早期，温度变化的速度和大小代表了与当前和预测的气候变化的自然类比。然而，数量有限的高分辨率代理档案挑战了我们对这一时期环境状况的理解。在这里，我们提出了来自瑞士苏黎世新发现的253个亚化石松树桩的树干年代学和放射性碳联合证据。每棵树的年龄为41-506年，生长在阿勒罗德和前北冰洋(∼13‘900-11’300 卡尔BP)之间。再加上之前从该地区采集的松树，这片世界上保存最完好的晚期冰川森林极大地改善了11‘300至11’900 卡尔BP之间绝对过时的欧洲树木年轮宽度年代学的最早部分。从∼12‘320和13’950 CalBP之间对65棵苏黎世松树的放射性碳测量提供了一个前景，将连续的欧洲树木年轮记录延长另一个∼2000年到冰河晚期。这些数据也将与确定拉契尔火山喷发(∼12‘900 卡尔BP)和两次阿尔卑斯山大地震(∼13’770和∼11‘600 卡尔BP)有关。总之，这项研究强调了测年精度和多指标比较的重要性，以将环境信号从方法噪声中分离出来，特别是在气候变异性高但数据可用性低的时期，例如年轻的仙女座寒流(∼11‘700和12’900 Cal BP)。
The rate and magnitude of temperature variability at the transition from the Last Glacial Maximum into the early Holocene represents a natural analog to current and predicted climate change. A limited number of high-resolution proxy archives, however, challenges our understanding of environmental conditions during this period. Here, we present combined dendrochronological and radiocarbon evidence from 253 newly discovered subfossil pine stumps from Zurich, Switzerland. The individual trees reveal ages of 41–506 years and were growing between the Allerød and Preboreal (∼13′900–11′300 cal BP). Together with previously collected pines from this region, this world's best preserved Late Glacial forest substantially improves the earliest part of the absolutely dated European tree-ring width chronology between 11′300 and 11′900 cal BP. Radiocarbon measurements from 65 Zurich pines between ∼12′320 and 13′950 cal BP provide a perspective to prolong the continuous European tree-ring record by another ∼2000 years into the Late Glacial era. These data will also be relevant for pinpointing the Laacher See volcanic eruption (∼12′900 cal BP) and two major Alpine earthquakes (∼13′770 and ∼11′600 cal BP). In summary, this study emphasizes the importance of dating precision and multi-proxy comparison to disentangle environmental signals from methodological noise, particularly during periods of high climate variability but low data availability, such as the Younger Dryas cold spell (∼11′700 and 12′900 cal BP).