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环境指示意义
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  environment designating singification
     Environment Designating Singification of Magnetic Parameters
     磁性参数的环境指示意义
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  environment implication
     ANNUAL CHANGES OF HEAVY METALS IN CORAL PLATYGYRA IN DAYA BAY AND THEIR MARINE ENVIRONMENT IMPLICATION
     大亚湾扁脑珊瑚中重金属的年际变化及其海洋环境指示意义
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  “环境指示意义”译为未确定词的双语例句
     Geochemical Characteristics and Their Implications to Provenance and Environment of Surface Sediments from the South Okinawa Trough
     冲绳海槽南部表层沉积物地球化学特征及其物源和环境指示意义
短句来源
     Distribution Differences of Fatty Acids in Paleosol and Loess Layers and their Paleoclimate Significances in Luochuan of Shannxi
     脂肪酸在古土壤层和黄土层中的分布差异及其环境指示意义
短句来源
     Microchemical characteristics of carp otoliths from two different water environments and their indication significance for environmental changes
     不同水域鲤鱼耳石微化学特征及其环境指示意义
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     The Characteristics of the Non-CaCO_3 Grain Size of Pelagic Sediment from the Ninetyeast Ridge and Its Indicated Significance of Environment
     东经90°海岭远洋沉积物非碳酸盐组分的粒度特征及环境指示意义
短句来源
     Based on fine analysis of the contents of carbon, hydrogen, nitrogen and their ratios, this paper reveals the environmental significance of H/C and C/N ratios in lacustrine organic matter in Lake Chenghai.
     本文通过对程海沉积物C、H、N等元素的含量及其比值的综合分析 ,辨识了程海沉积物有机质H/C及C/N值的环境指示意义 ,发现它们均可作为程海水位波动及区域气候干湿变迁的替代性指标。
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     The Environment
     环境
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     environment;
     环境;
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     Environment Designating Singification of Magnetic Parameters
     磁性参数的环境指示意义
短句来源
     Biological Indicative Function and Water Environment
     生物的指示作用与水环境
短句来源
     Environmental Implications of Pigments from Anoxygenic Phototrophic Bacteria in Sediments
     沉积物中细菌叶绿素的环境指示意义
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On basis of high gradient magnetic separation of iron oxide minerals from the laterite developed on carbonate in Guizhou,studies have been made of the iron xoide minerals bymeans of the Mossbauer spectroscopy. These studies show that goethite, hematite andmaghaemite are the main iron oxide minerals in the laterite. The regular variation of the ironoxide minerals associations along the laterite profiles records the changing of the pedogenicenvironment and is'of great environmental significance.

本文在高梯度磁选法分离红土中氧化铁矿物基础上,运用穆斯堡尔谱学方法对红土中氧化铁矿物进行了系统研究,并建立起红土中氧化铁矿物分析流程和研究方法体系。研究表明,红土中氧化铁矿物主要有针铁矿、赤铁矿和磁赤铁矿。氧化铁矿物沿红土剖面分布的规律性,记录了成土环境和古气候的周期性变化特征,具有重要的环境指示意义

Study on the eight magnetic parameters (incuding magnetic susceptibility, frequency dependent sumptibility, saturation remanence, ete.) of soils derived from carbonate rock in Guizhou showed that the magnetic properties and changing characteristics of soil were significantly affected by the pedogenic environment and process, and there properties were of important environmental sighficance. On the basis of high-gradient magnetic separation of iron oxide minerals from the soils, systematic studies have been made...

Study on the eight magnetic parameters (incuding magnetic susceptibility, frequency dependent sumptibility, saturation remanence, ete.) of soils derived from carbonate rock in Guizhou showed that the magnetic properties and changing characteristics of soil were significantly affected by the pedogenic environment and process, and there properties were of important environmental sighficance. On the basis of high-gradient magnetic separation of iron oxide minerals from the soils, systematic studies have been made on the soil magnetic properties and magnetic minerals by using X-ray diffraction, microprobe analysis,transaction electron microscope and Mossbauer spectrum.

本文对贵州碳酸盐岩发育土壤的磁化率、磁化率频率系数和等温剩磁等磁学参数的系统测定以及磁性矿物研究表明,碳酸盐宕发育土壤磁学性质及其变化特征主要受成土地球化学作用和环境影响,具有十分重要的环境指示意义。本文在采用高梯度磁性分离土壤中氧化铁矿物基础上,综合运用X射线衍射分析、电子深外分析、透射电镜和穆斯堡尔谱等方法,讨论了碳酸盐岩发育土壤中磁性矿物的形成机理。

Core RM, 310m in length, collected from the central part of the Zoige Basin, Eastern Tibetan Plateau, was analyzed. The upper 31m provides continuous palaeoclimatic information during the past 140ka, which is reconstated on the basis of stable oxygen isotope analyses of authigenic carbonate, organic carbon and nitrogen analysis. The δ18 O of authigenic carbonate is a good indicator for the palaeotemperature, whereas the variation in the C / N ratio corresponds with the percentage of the autothonous to allothonous...

Core RM, 310m in length, collected from the central part of the Zoige Basin, Eastern Tibetan Plateau, was analyzed. The upper 31m provides continuous palaeoclimatic information during the past 140ka, which is reconstated on the basis of stable oxygen isotope analyses of authigenic carbonate, organic carbon and nitrogen analysis. The δ18 O of authigenic carbonate is a good indicator for the palaeotemperature, whereas the variation in the C / N ratio corresponds with the percentage of the autothonous to allothonous organic matter in the lake sediments, reflecting the changes of the runoff and palaeo-precipitation conditions. Therefore, the analytical results have revealed changes in the palaeoenvironmental condition, induced by climate changes and / or local hydrological factors.Five stages are identified for the palaeoclimate in the past 140ka and can be compared with the oxygen isotope curve of deep sea cores. Stage 5(140- 80kaB. P.) is equlvalent to the Last Interglaciation, in which 5 substages(5a—5e) can be identified. 5e is the warmest, 5d is the coldest and 5a has the best effective moisture within stage 5. Substage 5e can be identified in to further 5 little stages, and this kind of geological phenomena has been shown in a lot of records, e. g,magnetic susceptibility records from adjacent areas, pollen records from Eurpe, δ180 records from deep sea cores and Greeuland ice cores, which has been speculated to be a result from the change in the summer solar insolation. Stage 4 is characterized by cold/dry climate. Stage 3(60—30kaB.P.) is a relatively warm and wet period, characterized by abundant precipitation. The Zoige Basin was cut through by the Yellow River since 30kaB.P. and the proxies are of no use in terms of the identification of the palaeoclimare. The peak value of C / N in Core RM of this period suggests intensified river processes, and an increase in precipitation over the drainage area. The special charateristics of stage 3 in Qinghai-Xizang Plateau should be considered in the future Quaternary studies. Compartive study has been undertaken for the Core RM records with the other records of adjacent areas and in the world, and the climatic evolution and its characteristics in different stages of the northeastern Qngzang Plateau have been discussed.

于1993年在青藏高原东北部若尔盖盆地沉积中心钻取一长310m的湖泊岩芯(RM孔),对其上部31m的湖泊沉积物进行了年代测定以及自生碳酸盐氧同位素、有机碳氮分析,重建了14万a来的古气候演化过程,基本上可以区分出5个阶段。结果表明,5阶段(140-80kaB.P.)气候温暖湿润,内部又可区分出5a—5e;4阶段(80-60kaB.P.)气候以冷干为主;3阶段(60—30kaB.P.)为相对温湿期,降水丰富,流域径流量较大;30kaB.P.以来若尔盖古湖逐渐被黄河支流切开,各项代用指标的环境指示意义不明显。同时对比邻区陆相记录,探讨了高原东北部不同阶段气候演化的过程和细节。

 
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