埋藏古木树轮碳、氢、氧同位素研究与古气候重建

树轮作为自然档案的一种,其同位素研究对探讨全球气候和环境变化具有重要的意义.文章系统地介绍了树轮碳、氢、氧同位素的分馏原理, 研究方法以及纤维素的提取等.研究表明,树轮同位素作为环境变化的示踪剂,是古环境再造和了解现代环境气候变化的一个强有力工具.尤其是在过去全球变化(PAGES)研究中,埋藏古木纤维素中的碳、氢、氧同位素分析已成为环境演化研究的主要量化手段.另外,对于中国这样典型的季风气候国家,开展树轮稳定同位素随季节性变化的研究具有重要的意义. 我国在树轮研究方面起步较晚,研究方法和研究内容上也比较简单,还存在不小差距,既要进一步积累基础资料,又要做区域对比,加强与相关学科的交叉研究.

Carbon,Hydrogen Oxygen Isotope Studies on Imbedded Old Tree Ring and Paleoclimate Reconstruction

Tree ring is a kind of natural archives,on which the isotopic analysis is important to study global climate and environmental change.The authors mainly provide a comprehensive introduction to the fractionation models of carbon,hydrogen and oxygen isotope in plants,their research techniques and the extract methods from cellulose.That results show isotopic tracer can record the message of climatic variation and has become a powerful tool for paleoclimate reconstruction and for the modern environment changing research.Especially studying on PAGES,the cellulose isotopic analyses of imbedded old tree ring have become the mainly quantitative means of environmental evolvement.In addition,China is a typical monsoon country,research in tree ring stable isotope seasonal variation can give us a lot of important information on that.Up to now,the research techniques and works on tree ring in our country are still in its earlier stage,and remain many limitations.It needs further accumulate basic research materials,intensify regional contrast and intercross studies on relative subjects.