可可西里地区盐湖现代蒸发岩初探

1990年夏季,对青藏高原西北部无人区,进行了地理、地质、生物等方面的综合考察。现代含盐湖盆固相沉积的研究结果,发现了8种盐类矿物、4种泉华析出物,初步摸清了该区现代沉积与蒸发岩的矿物组合、湖盆演化现状,填补了本区含盐湖盆研究的空白。     

中国现代地图学发展的里程碑——中国国家地图集的编纂与出版

本文论述了中国国家地图集自20世纪50年代至今的研制发展历程,同时从其编制理论和技术方法等方面的特点作了系统分析,并且较全面地总结了图集编制的成功经验。     

论社会活力与人的自由

社会活力是人类社会蕴藏的在一定历史条件下稳定和发展并存的现实可能性 ,它标志着一个社会对新情况的巨大适应性和无穷的创造潜能 ;人的部分自由和部分人的自由为传统社会向现代社会的转型准备了必要的条件 ,自由构成了社会活力的动力机制的核心环节 ,人们追求自由的完善促使社会活力能够得以不断延展和补充     

Quantitative estimates of temperature and precipitation changes over the last millennium from pollen and lake-level data at Lake Joux, Swiss Jura Mountains

This paper presents quantitative climate estimates for the last millennium, using a multi-proxy approach with pollen and lake-level data from Lake Joux (Swiss Jura Mountains). The climate reconstruction, based on the Modern Analogue Technique, indicates warmer and drier conditions during the Medieval Warm Period (MWP). MWP was preceded by a short-lived cold humid event around AD 1060, and followed by a rapid return around AD 1400 to cooler and wetter conditions which generally characterize the Little Ice Age (LIA). Around AD 1450 (solar Spörer minimum), the LIA attained a temperature minimum and a summer precipitation maximum. The solar Maunder minimum around AD 1690 corresponded at Joux to rather mild temperatures but maximal annual precipitation. These results generally agree with other records from neighbouring Alpine regions. However, there are differences in the timing of the LIA temperature minimum depending on the proxy and/or the method used for the reconstruction. As a working hypothesis, the hydrological signal associated with the MWP and LIA oscillations at Lake Joux may have been mainly driven by a shift around AD 1400 from positive to negative NAO modes in response to variations in solar irradiance possibly coupled with changes in the Atlantic meridional overturning circulation.     

基于城乡一体化的"现代地籍"变更研究

城乡一体化“现代地籍”建设是我国现阶段乃至今后地籍工作的一个长期目标和任务,而地籍变更是日常地籍管理工作中的重要部分.本文从城乡一体化“现代地籍”管理方式的角度,探讨了有别于传统方式的现代地籍变更模式,并详细介绍了“现代地籍”变更中的权属变更、地类变更和历史回溯.     

Study on Distribution Characteristics of Modern Agricultural Function of Basins in Guizhou,China

Agricultural modernization is the engine of rural development. Guizhou's landforms are mainly mountainous and hilly areas and there are few basins that are conducive to the development of modern agriculture. Therefore, the study of the modern agricultural function distribution of basins can provide scientific reference for the adjustment of Guizhou's agricultural industrial structure. This research used ArcGIS 10.2 to interpret the high-definition remote sensing images from 2016 to identify modern agricultural functional plots and modern agricultural functional basins in Guizhou Province, and used kernel density and bivariate local spatial autocorrelation to analyze the spatial distribution characteristics of the plots and basins, and the local spatial autocorrelation between the plots and the basins. The results show that: i. The area and number of modern agricultural functional plots in Zunyi Municipality, Qian Nan Buyi and Miao Autonomous Prefecture, and Bijie Municipality are all within the first three columns in the whole province, and the spatial autocorrelation between plot and basin area is the strongest; ii. The basins form a high-density core area at the intersection of Bozhou District and Honghuagang District in Zunyi Municipality. The plots form a high-density core area at the intersection of Huishui County, Changshun County, Pingba District and Huaxi District; iii. There is a strong positive correlation between the area of the plots and the area of the basins; iv. The proportion of the plot in the basin is mainly between 0 and 10%.     

北极阿拉斯加巴罗地区现代环境的地球化学特征研究*

本文以北极阿拉斯加巴罗地区样品分析为依据,研究泻湖、淡水湖、河流、沼泽、土壤等的环境地球化学特征。结果表明,巴罗地区融冻物理风化作用强烈,化学风化和生物地球化学作用较弱,物质以机械搬运为主,H⁺为地带性标型元素。地表水化学类型阴离子以Cl^-为主,阳离子以K⁺Na⁺为主。现代沉积物、地表土壤、沼泽泥炭层有机质含量丰富,最高可达50.07%.大量元素SiO₂含量极高,稀有稀土元素、微量元素含量偏低,但Hg、Cd、Cr的含量相对较高。     

现代气象装备技术保障新的思考

本文根据现代气象设备的新技术及其特点，给技术保障工作带来新的变化，提出了做好技术保障工作的新思路、新方法和新措施。     

An analysis of phytolith assemblages for the quantitativereconstruction of late Quaternary environments of the Lower Taieri Plain,Otago, South Island, New Zealand I. Modern assemblages and transferfunctions

An analysis of modern phytolith assemblages is presented.Phytolith assemblages were studied in modern surface soils and sediments of 28sites from east Otago, New Zealand, within a range of vegetation types andmicroclimates. No simple distinction could be made between vegetation types onthe basis of phytolith assemblage composition. A Principal Components Analysis(PCA) of the phytolith data set revealed that festucoid, chloridoid andspherical phytolith morphotypes formed strong associations with sites fromwetland, grassland, and forest vegetation types, respectively. Moreimportantly, a comparison of sample replicates from each field site using Squared ChordDistance (SCD) assemblage analysis showed that wetland and grassland sitestended to produce more internally consistent phytolith assemblages than forestsites. Environmental variables including pH, conductivity, altitude,precipitation and temperature were also gathered for each site. The ability ofeach environmental variable to reflect variance in the entire phytolithdata set was estimated by a series of Redundancy Analyses (RDA) with MonteCarlo permutation tests of statistical significance. After a forward selectionprocess, transfer functions were generated using Partial Least Squares (PLS)regression and calibration with jack-knife validation. The final transferfunctions have root mean squared errors of prediction for pH (0.47), logconductivity (0.38 S cm), average annual precipitation (63mm), and average annual (0.28 °C), spring (0.38 °C) andautumn temperature (0.41 °C); the smallest group of environmental variablesexplaining the most variance in the modern phytolith data set. The most usefultransfer functions for application to fossil phytolith data andpaleoenvironmental interpretation are pH, log conductivity and annualprecipitation. The relationship between changes in pH and annual precipitationand phytolith assemblage composition found in this study presents aprima facie relationship with the potential to providedirect proxies for soil weathering and indirectly for paleoenvironmentalreconstruction.     

黄骅坳陷井壁崩落法现代构造应力场测量

简述了井壁崩落椭圆的特征、识别标志及其测量方法,对黄骅坳陷区内32口井的四臂地层倾角测井和地层倾角测井资料应用Stereonet程序对几千组数据进行分析、处理,得出了黄骅坳陷区域现代构造应力场的最大水平主应力优势方向为N70°—80°E,而枣园油田区局部应力场最大水平主应力方向为N50°—60°E,其结果表明黄骅坳陷区域NEE向水平挤压应力场与黄骅坳陷内的北北东—北东东向断裂现代右旋走滑活动相一致,而枣园油田区由于受风化店构造的局部影响,最大水平主应力方向向北发生了20°—30°的偏转,这表明在统一的区域应力场状态下,局部构造应力场受局部构造的控制。