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Dating the "Undateable" - Quantitative Environmental Reconstruction and Precision Chronology Using Tree-ring Stable Isotopes

测定“不可测年”的年代——使用树木年轮稳定同位素进行定量环境重建和精确年代学

基本信息

批准号：
EP/X025098/1
负责人：
Neil Loader
金额：
$ 344.88万
依托单位：
Swansea University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2023
资助国家：
英国
起止时间：
2023 至无数据
项目状态：
未结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FX025098%2F1
关键词：
Dating Undateable Quantitative Environmental Reconstruction

项目摘要

Dendrochronology, or tree-ring dating, is the most precise dating method in science-based archaeology. It allows the growth of an individual tree ring to be assigned to a single calendar year and, where wood samples retain the bark-edge, it is possible to determine the season and the year in which the tree died, or was felled. The method can provide absolute calendar dates and has revolutionised the dating of wooden structures and artefacts across Europe. Where the trees grew under strong environmental stress, typically at high altitude or latitude, it is also possible to extract information on the climate of the past.However, dendrochronology and dendroclimatology are constrained by the length and variability of the tree-ring sequence being dated, as well as by the tree species, age and provenance. This means that a large proportion of samples, particularly those from regions such as NW Europe where climate rarely limits growth, cannot be dated or used for historical climate reconstruction.Using stable isotopes rather than ring widths, for both dating and palaeoenvironmental reconstruction, the QUERCUS project will develop the first annually-resolved isotopic chronologies for NW Europe extending c. 4,500 years to the Bronze Age. QUERCUS will advance the technique for species and regions where chronology and palaeoclimate data are most needed, to permit short sequence, inter-genus and multi-method dating of archives and artefacts that have remained undateable since the development of scientific dendrochronology.The stable isotope chronologies carry strong climate signals, and can be used to reconstruct the climate of the past even when the trees were not growing under environmental stress. Using a multi-disciplinary approach, these records, calibrated using some of the longest instrumental series in the world, will deliver unrivalled quantified reconstructions of summer climate for culturally-rich, populous regions where climatic change has impacted upon society over millennia.

树木年代学，或称树木年轮测年，是基于科学的考古学中最精确的测年方法。它允许将单个树木年轮的生长分配到一个日历年，如果木材样本保留树皮边缘，则可以确定树木死亡或被砍伐的季节和年份。该方法可以提供绝对的日历日期，并彻底改变了整个欧洲的木结构和人工制品的年代。树木生长在强烈的环境压力下，通常是在高海拔或高纬度地区，也有可能提取过去气候的信息，但树木年代学和树木气候学受到树木年轮序列的长度和可变性以及树种、年龄和种源的限制。这意味着很大一部分样品，特别是那些来自欧洲西北部地区的样品，那里的气候很少限制生长，不能被测年或用于历史气候重建。QUERCUS项目将使用稳定同位素而不是环宽，用于测年和古环境重建，为欧洲西北部开发第一个年度分辨率的同位素年表，延伸到c. 4,500年前的青铜时代。QUERCUS将为最需要年代学和古气候数据的物种和地区推进技术，以允许对自科学树木年代学发展以来一直无法确定日期的档案和人工制品进行短序列、属间和多方法测年。稳定同位素年代学具有强烈的气候信号，即使树木没有在环境压力下生长，也可以用来重建过去的气候。这些记录采用多学科方法，使用世界上最长的乐器系列进行校准，将为文化丰富、人口稠密的地区提供无与伦比的夏季气候量化重建，这些地区的气候变化已影响社会数千年。