Reanalysis of the Atmospheric Radiocarbon Calibration Record from Lake Suigetsu, Japan
Reanalysis of the Atmospheric Radiocarbon Calibration Record from Lake Suigetsu, Japan
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DOI：
10.1017/rdc.2020.18
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发表时间：
2020-03
期刊：
影响因子：
8.3
通讯作者：
C. Bronk Ramsey;T. Heaton;G. Schlolaut;R. Staff;C. Bryant;A. Brauer;H. Lamb;M. Marshall;T. Nakagawa
中科院分区：
文献类型：
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作者：
C. Bronk Ramsey;T. Heaton;G. Schlolaut;R. Staff;C. Bryant;A. Brauer;H. Lamb;M. Marshall;T. Nakagawa
摘要日本水月湖沉积记录中的陆生植物宏体化石提供了唯一覆盖最近50 ka cal BP的放射性碳（14 C）准连续直接大气记录（Bronk Ramsey et al. 2012）。从那时起，中国葫芦洞的U-Th测年洞穴沉积物获得了新的高精度数据，涵盖了相同的时间范围（Cheng等人，2018）。此外，基于对沉积物的扩展显微镜分析和改进的插值算法，还发布了2006年水月湖（SG 06）岩心的更新的基于纹层的年代学（Schlolaut等人，2018）。在这里，我们重新分析的放射性碳数据集从水月的基础上新的纹计数信息和洞穴数据所施加的约束。这使得Suigetsu数据集日历年龄尺度的新信息能够用于构建共识IntCal校准曲线。洞穴沉积物和植物宏体化石记录的比较提供了深入了解碳纳入不同类型的记录和相对强度的不同类型的档案校准目的的机制。
ABSTRACT Terrestrial plant macrofossils from the sedimentary record of Lake Suigetsu, Japan, provide the only quasi-continuous direct atmospheric record of radiocarbon (14C) covering the last 50 ka cal BP (Bronk Ramsey et al. 2012). Since then, new high precision data have become available on U-Th dated speleothems from Hulu Cave China, covering the same time range (Cheng et al. 2018). In addition, an updated varve-based chronology has also been published for the 2006 core from Lake Suigetsu (SG06) based on extended microscopic analysis of the sediments and improved algorithms for interpolation (Schlolaut et al. 2018). Here we reanalyze the radiocarbon dataset from Suigetsu based on the new varve counting information and the constraints imposed by the speleothem data. This enables the new information on the calendar age scale of the Suigetsu dataset to be used in the construction of the consensus IntCal calibration curve. Comparison of the speleothem and plant macrofossil records provides insight into the mechanisms underlying the incorporation of carbon into different types of record and the relative strengths of different types of archive for calibration purposes.