A study of determining the tree-ring age with a precision of one year by 14C wiggle matching

14C摆动匹配一年精度测定树木年轮年龄的研究

• 批准号: 16320108
• 负责人: NAKAMURA Toshio
• 金额: $ 9.47万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16320108/
• 关键词: radiocarbon; accelerator mass spectrometry; tree ring; radiocarbon dating; tree-ring age; wiggle matching; Yaku-sugi tree; Changbaishan; 長白山火山

This research aims to investigate the possibility of determining the age of annual ring for a wood sample excavated from archeological sites or geological sediments with a precision of one year, by 14C dating of their annual rings with AMS and applying 14C wiggle-matching. We first measured 14C ages of individual annual rings as many as possible that were separated from Japanese cedar trees grown in Yaku Island, Kagoshima, and at Muroji temple, Nara, Japan. The sample trees were dated dendrochronologically in advance.61 annual rings (AD1617-1739) from the Muroji tree, 173 (AD1413-1615) and 78 rings (AD881-1072) from the Yaku-Island tree were 14C dated and their age values are compared with respective 14C values from the internationally accepted IntCa104 14C-age calibration data. The 14C ages were consistent with one another within measurement errors, but a tendency that 14C ages of Japanese trees were older than IntCa104 data for respective annual rings.Next, 55 annual rings (AD1631-1739) from the Muroji tree and 142 rings (AD1413-1554) from the Yaku-Island tree were wiggle-matched to the IntCa104 data. The matching yielded a perfect coincidence of 14C-determined age to dendro-dated one with +/-2 year uncertainty (95% confidence) for the Muroji tree. For the Yaku-island tree, 14C-determined age was older by 4 years than the dendro-dated one with +/-2 year uncertainty. It is clearly suggested that age estimation of a tree is possible with a precision of about one year by wiggle matching if a larger number of annual rings will be dated for the sample tree.We also tried to date the outermost ring of archeological and geological wood samples by wiggle matching, and could conclude that a far better accuracy is obtained by this method than by the ordinary method of 14C dating of only the outermost annual ring of the woods.

本研究旨在探讨通过 AMS 对年轮进行 14C 测年并应用 14C 摆动匹配来确定从考古遗址或地质沉积物中出土的木材样本年轮年龄的可能性，精确度为一年。我们首先测量了尽可能多的个体年轮的 14C 年龄，这些年轮是从生长在鹿儿岛屋久岛和奈良室生寺的日本雪松树中分离出来的。提前对样本树进行了树木年代测定。对室地树的61个年轮（AD1617-1739）、屋久岛树的173个年轮（AD1413-1615）和78个年轮（AD881-1072）进行了14C测年，并将其年龄值与国际通用的IntCa104 14C年龄校准数据中各自的14C值进行了比较。 14C 年龄在测量误差内彼此一致，但日本树木的 14C 年龄有比各自年轮的 IntCa104 数据更古老的趋势。接下来，室地树的 55 个年轮（AD1631-1739）和屋久岛树的 142 个年轮（AD1413-1554）与 IntCa104 数据进行摆动匹配。匹配产生了 14C 确定的年龄与室地树年龄的完全一致，具有 +/-2 年的不确定性（95% 置信度）。对于屋久岛树，14C 测定的年龄比树突测定的年龄大 4 年，不确定性为 +/-2 年。这清楚地表明，如果要对样本树进行大量年轮测年，则可以通过摆动匹配以约一年的精度估算树龄。我们还尝试通过摆动匹配对考古和地质木材样本的最外层年轮进行测年，并且可以得出结论，该方法比仅对木材最外层年轮进行 14C 测年的普通方法获得了更高的准确性。

项目成果

紀元前4世紀、宮崎クスノキ材年輪中の放射性炭素濃度の測定

公元前4世纪，测量宫崎樟树年轮中的放射性碳浓度

• 发表时间: 2007
• 期刊: 名古屋大学加速器質量分析計業績報告書 18
• 作者: 永冶健太郎;北澤恭平;増田公明;ほか
• 通讯作者: ほか

Variation of radiocarbon content in tree rings during the Sporer Minimum

孢子极期期间树木年轮中放射性碳含量的变化

• 发表时间: 2004
• 期刊: Radiocarbon 46(1)
• 作者: H.Miyahara;K.Masuda;H.Furuzawa;T.Nakamura;他
• 通讯作者: 他

名古屋大学タンデトロン2号機の現状と利用

名古屋大学Tandetron No.2的现状及使用

• 发表时间: 2005
• 期刊: 名古屋大学加速器質量分析計業績報告書 XVI
• 作者: 中村俊夫;丹生越子;小田寛貴 ほか
• 通讯作者: 小田寛貴 ほか

Marine reservoir effect deduced from 14C dates on marine shells and terrestrial remains at archeolpgical sites in Japan.

根据日本考古遗址的海洋贝壳和陆地遗迹的 14C 年代推断出海洋储层效应。

• 发表时间: 2007
• 期刊: Nuclear Instruments and Methods in Physics Research B259
• 作者: Nakamura;Toshio
• 通讯作者: Toshio

Application of 14C Wiggle-Matching to Support Dendrochronological Analysis in Japan

• DOI: 10.3959/1536-1098-63.1.37
• 发表时间: 2007-06
• 作者: T. Nakamura;M. Okuno;K. Kimura;T. Mitsutani;H. Moriwaki;Y. Ishizuka;K. H. Kim;B. Jing;H. Oda;M. Minami;H. Takada