Isotope ; global change ; tree ring ; lake sediment ; ice core 同位素全球变化树轮湖泊沉积物冰芯
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Oh , red leaves , i ' ve read your poetic message in the tree rings 红叶，我在树木的年轮里读过你的文章。
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Later research on tree rings put the date at between 1699 and 1700 随后对年轮所做的研究把日期订在1699至1700年间。
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Carbon , hydrogen oxygen isotope studies on imbedded old tree ring and paleoclimate reconstruction 埋藏古木树轮碳氢氧同位素研究与古气候重建
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Also , paleoclimatologists can use data from tree rings , pollen analysis and the local geology to determine the temperatures and precipitation at the time 此外，古气候学者利用年轮、花粉分析、当地地质等资料，可以确定当时的气温与雨量。
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For the first 600 years of the 1 , 000 - year chronology , he claims , researchers used tree rings alone to gauge temperature and only those from four separate locations 他主张，就过去1000年的头600年而言，研究者只利用树木的年轮来估计气温，而且树轮只取自四处不同的地点而已。
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The global change study is one of the most spectacular and interesting environment scientific questions in the 1990 s . the message of global change stores in tree rings , ice core , loess , underground water , lake sediment and deep sea sediment , all these proxies record the information of global change . with the advances in stable isotope techniques , the isotopic tracer records the message of climatic variation and becomes a powerful tool that can understand paleoenvironment reconstruction and modern environment changing 全球变化研究是90年代以来最为引人注目和关切的环境科学问题之一。全球环境变化的信息储存于树轮湖泊冰芯黄土地下水和海洋沉积物等载体中，随着稳定同位素技术的发展，同位素示踪剂指示环境变化的信息，成为了解古环境再造和现代环境信息变化的一个强有力的工具。
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According to surface temperature reconstructions for the last 2 , 000 years , there is also sufficient evidence from tree rings , boreholes , retreating glaciers , and other " proxies " of past surface temperatures to say with a high level of confidence that the last few decades of the 20th century were warmer than any comparable period in the preceding 400 years 根据对过去两千年地球表面温度的重构所得出的结论，以及从树的年轮、地上凿洞、退后的冰河线和过去地表温度的其它“代表数据”中得出的充足证据，可以毫无疑问地讲，二十世纪最后几十年的气温要比以前四百年中任何有可比性的时期都高。
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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 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。
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According to surface temperature reconstructions for the last 2 , 000 years , there is also sufficient evidence from tree rings , boreholes , retreating glaciers , and other " proxies " of past surface temperatures to say with a high level of confidence that the last few decades of the 20th century were warmer than any comparable period in the preceding 400 years 根据《过去200年地表温度重建》显示，同样有充足的证据，例如树木的年轮，地上开采石油及水源，冰川的融化，以及其他代表性象征，让人确信地表温度在20世纪地近几十年会比以前400年的温度有所上升。
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