isotope change 中文意思是什麼
isotope change
解釋
同位素變化-
Isotope ; global change ; tree ring ; lake sediment ; ice core
同位素全球變化樹輪湖泊沉積物冰芯 -
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
全球變化研究是90年代以來最為引人注目和關切的環境科學問題之一。全球環境變化的信息儲存於樹輪湖泊冰芯黃土地下水和海洋沉積物等載體中，隨著穩定同位素技術的發展，同位素示蹤劑指示環境變化的信息，成為了解古環境再造和現代環境信息變化的一個強有力的工具。 -
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
尤其是在過去全球變化pages研究中，埋藏古木纖維素中的碳氫氧同位素分析已成為環境演化研究的主要量化手段。另外，對于中國這樣典型的季風氣候國家，開展樹輪穩定同位素隨季節性變化的研究具有重要的意義。我國在樹輪研究方面起步較晚，研究方法和研究內容上也比較簡單，還存在不小差距，既要進一步積累基礎資料，又要做區域對比，加強與相關學科的交叉研究。 -
Some hot research fields such as global change, ecology and environment and sr isotope are becoming more and more important
此外，在一些熱點研究上，如全球變化、生態環境等方面，也逐漸顯現出重要性。 -
Lmpa, the relationship is f di = l 55xl0 - " e47j l t ) in this range, the relative error of the hydrgen permeabilty bbeen the experimental values and the formula values are less than 3 %, the durability test showed that after the cycle experiments of prcssure and tempebe for 30 days, the perfrmance of the membran did not change, at last, the theory of hydrogen permeaton was discussed, too. through this work, the pfepared surf ases modified zirconium memran can satisfy the requirement of the purity and the permeating fiux of hydrogen isotope gas
Imp范圍內，鋁表面改性選擇滲氫膜的數學表達式為： （ 1320 i 155x10 」 exd l 「 t ）在這個溫度和壓差范圍內，滲氫系數的實驗數據計算值與數學公式計算值的誤差在3以內；鉻表面改性選擇滲氫膜的壽命考核實驗表明，經過連續30大的循環溫度、壓力實驗，膜的質量、性能無變化；並討論了膜的滲氫理論。 -
Tree - ring ; isotope ; environment change
樹輪同位素環境變化 -
Based on the elaborate research on the stable oxygen isotope stratigraphy, carbonate stratigraphy, biostratigraphy, magnetic susceptibility, grain size and clay mineral of cores marked md81349, md77190, md77181 and bar9427 in the northeastern indian ocean, this thesis focus on the application of the tl properties in the above cores to infer the paleoclimatic change, and discuss the response of tl of sedimentary records with climatic cycles during the last 300, 000 years
論文對東北印度洋地區不同地理位置的md81349 、 md77190 、 md77181 、 bar9427四支巖芯的全巖熱釋光和md81349巖芯純凈有孔蟲的熱釋光測量，與已知氧同位素地層資料對比后發現四支巖芯的熱釋光變化與氧同位素地層揭示的氣候變化及可能的隆升事件有良好的對應關系。
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