新生代埋藏木稳定同位素研究进展  

A review in stable isotope studies for buried wood during the Cenozoic

作　　者：任军博 许晨曦[1] REN Junbo;XU Chenxi(Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029)

机构地区：[1]中国科学院地质与地球物理研究所,中国科学院新生代地质与环境重点实验室,北京100029

出　　处：《第四纪研究》2024年第4期1062-1078,共17页Quaternary Sciences

基　　金：国家自然科学青年科学基金项目(批准号:42307557);中国博士后科学基金第74批面上项目(批准号:2023M743473)共同资助。

摘　　要：树轮稳定同位素研究为理解过去和预测未来气候变化提供了重要依据。新生代有着不同增温条件下的气候变化特征以及多次气候突变事件,是预测地球未来气候发展变化的重要参考时期。新生代地层中的埋藏木化石保存了生长过程中形成的纤维素和木质素等基本木质结构,其稳定同位素指标可以为探究深时季节-年代际古气候变化提供新的研究视角。回顾埋藏木稳定同位素研究发现,大多数研究区和作者都来自欧美地区,并主要在以下领域取得进展:1)埋藏木稳定同位素平均值可以重建古降水和古温度平均态;2)埋藏木稳定同位素季节性变化可以重建季节性降水变化和源水来源;3)埋藏木多同位素的结合可以重建古相对湿度等更加精细的气候信息。未来埋藏木多种同位素结合的研究、埋藏木稳定同位素在考古领域中的应用和木质素团簇同位素的应用等方面将会有广阔发展前景。Stable isotope studies on tree rings significantly enhance our understanding of past climates.The Cenozoic era,characterized by varying warming conditions and numerous climate extremes,emerges as an important epoch for predicting future climate change.Buried fossil wood within Cenozoic strata,which preserves the cellulose and lignin from its growth ages,would offer valuable insights into paleoclimatic shifts ranging from seasonal to interdecadal scales.A review of buried wood isotope studies reveals a predominant concentration of research sites in Europe and the Americas.These studies mainly focus on three areas:(1)using buried wood stable isotopes for reconstructing paleoprecipitation and paleotemperature;(2)integrating multiple isotopes of buried wood to determine relative humidity and other climate parameters;and(3)utilizing seasonal isotopic variations in buried wood to reconstruct fluctuations in seasonal precipitation and trace the origin of source water.Future research holds great potential,especially in integrating multiple isotopes in buried wood,elucidating the paleoclimatic significance of seasonal isotope variations,and applying isotopes in lignin clusters.

关 键 词：木化石 纤维素 树轮碳同位素 树轮氧同位素 古气候 

分 类 号：S718.5[农业科学—林学] P467[天文地球—大气科学及气象学]