地震灾害风险普查中地震危险性计算效率

分别用120″、60″、30″、15″、9″和6″经纬度划分网格覆盖目标区并计算网格点地震危险性,进而利用空间插值得到较小网格的地震危险性结果,通过比较直接计算的小网格点地震危险性结果和通过较大空间网格插值得到的小网格的地震危险性结果,评估由较大空间网格插值所得结果的可靠性、适用性及使用要求。结果表明,30″经纬度划分网格计算值插值得到的各种小网格的地震危险性结果的误差都小于1 Gal,是兼顾精度和速度的网格间隔。     

Ronge-Kutta法在计算复杂构造区域地震波旅行时中的应用

采用Ronge-Kutta射线追踪法对地震勘探中几个典型地质模型的地震波射线路径和旅行时计算的实例和效果进行分析。将Ronge-Kutta射线追踪模拟的结果与程函方程计算的时距曲线结果进行对比,验证了Ronge-Kutta射线追踪法的易实现性和程函方程有限差分旅行时算法的强稳定性,表明Ronge-Kutta射线追踪法在复杂构造区域进行地震射线路径和旅行时计算时能得到较好的模拟效果。     

阳高6.1级地震前倾斜固体潮振幅因子熵的变化

本文从沙农(C.E.Shannon)的信息熵出发,定义了倾斜固体潮振幅因子(γ值)的信息熵。根据阳高地震周围若干台站γ值的计算结果,计算了各台γ值的熵。 文中对γ值熵变化的物理意义及与γ值变化的关系进行了必要的讨论,最后给出以下结论: 1.阳高地震的孕育过程伴随倾斜固体潮振幅因子熵的减少。 2.地震前,γ值熵的变化说明了γ值变化的相对平静现象亦可能是震兆的一种形式。这一结论对于震兆的认识无疑是一有益的补充。     

滇西试验场区地壳的试验均衡研究

本文利用滇西试验场区最新完全布格重力异常和地形高资料，采用设置虚拟数区和边界限定、消除趋势项、低道滤波等预处理措施，按试验均衡理论，计算了该区地壳的均衡响应函数及试验均衡异常；结合文献［１］的研究结果，对其均衡异常分布特征、区域构造运动机制、活动断裂与强震展布间的关系进行了研究；结果表明：１）该区均衡响应函数值高于美国、加拿大及我国华北等地区，其地壳处于亚均衡状态；２）区内各部位的均衡状态并不均一，且异常幅值大小多与地壳的相对隆起或沉降相关；３）红河断裂带两侧均衡异常值差异明显，全区均衡异常的展布同活动断裂与强震分布有较密切的联系。     

类乌齐-玉树-玛多剖面重力异常研究

青海玉树Ms7.1地震发生在巴彦喀拉块体的甘孜-玉树断裂带上。对跨断裂带的重力剖面测线进行了相对重力联测,对观测结果作了大气改正、极移改正、漂移改正,经平差计算后,获取了该剖面的自由空气异常;结合该区1″×１″的ASTER GDEM(2009)地形数字模型,对自由空气异常作了曲率改正、平板改正及高精度的地形改正,得到该探测剖面的完全布格重力异常。分析结果表明：从布格异常的陡变区可初步推断出与地质研究结果一致的断裂构造的位置;在玉树附近沿剖面往东北向出现地壳基底抬升现象,并在清水河附近幅度达到最大,初步推断为印度地壳的俯冲下插对青藏高原东缘的抬升作用的结果。     

中国东南陆缘大地水准面的确定

利用我国东南地区１１８２２个重力数据、３０″×３０″数值地形模型和ＷＤＭ９４重力位模型,以Ｓｔｏｋｅｓ理论为基础,采用低通滤波方法处理远区影响,计算了中国东南陆缘２．５′×２．５′格网重力大地水准面,其结果与福建、山东的ＧＰＳ水准相比较,精度分别为±０．１２４ｍ和±０．０６２ｍ。     

天然水CaCO_3侵蚀量与沉淀量的计算

天然水ＣａＣＯ３侵蚀量与沉淀量的计算是岩溶地球化学研究中的一个重要问题，本文在指出有关文献对这一问题的处理存在严重问题的同时，提出了天然水ＣａＣＯ３侵蚀量与沉淀量计算的新方法。该方法以水溶液相对ＣＳＣＯ３饱和度的计算为基础，对ＣａＣＯ３溶解或沉淀所引起的水溶液ｐＨ值、组分的活度系数以及水溶液中各组分存在形式含量的变化统一地作了考虑，且区分开放系统与封闭系统两种不同的情况分别进行了计算。实际水样的计算结果表明，计算中若不考虑上述的种种变化，则计算结果的误差将是相当大的。     

怀4井数字气汞固体潮响应初步研究

数字化地下水气汞动态观测中,发现怀4井气汞有明显的固体潮潮汐效应。介绍了怀4井井口装置的两个关键环节的设计;对2004年10月份的气汞数字化观测资料进行了小波分析,提取到了气汞固体潮半日波和周日波;并使用Vendikov调和分析方法对2004年度观测资料进行计算,获得了有一定信度的潮汐响应函数。     

卷云中冰晶粒子的单次散射参数

利用射线光学理论和等效球Ｍｉｃ理论，计算了卷云中六棱状冰晶和六角片状冰晶及两种假设冰晶谱的单次散射参数，并对两种计算结果进行了详细分析和比较、得到一些有用的结论。     

GPS形变监测网起算点坐标对水平形变的影响

利用首都圈ＧＰＳ形变监测网的资料,用伯尔尼软件计算并分析了大规模ＧＰＳ地形变监测网中起算点坐标误差对水平形变计算结果的影响,给出了３种典型图形。利用速率动态平差结果,分析了不同固定点的情况下,ＧＰＳ形变监测网的点位位移中误差的分布特点。     

Thermohaline structure inhomogeneity associated with polynia at the northern margin of Emery Ice-shelf

Based on the hydrographic data in austral summer during the 22nd Antarctic Expedition of China(2005/2006),some features can be found about the northern margin of Emery ice shelf as follows.The heat content in the surface layer(0-50 m) at the eastern end and the western end of the ice-shelf margin is much higher than that at the middle.The upper mixing-layer depth and the seasonal thermocline depth at the middle of the ice-shelf northern margin are much shallower than those at the both ends.However there is much less difference between the middle and the ends in the bottom layer.The remote sensing photos show that the inhomogeneity in the surface-layer water is closely related to the spatial distribution of the floes and polynia in the area.     

Phylogenetic analysis of cultivable bacteria isolated from Arctic sea-ice

Phylogenetic analysis based on 16S rDNA of 8 strains of cultivable bacteria isolated from Arctic sea-ice was studied.The results showed that strain BJ1 belonged to genus Planococcus,which was a genus of low mole percent G C gram-positive bacteria;strain BJ6 belonged to genus Burkholderia of β-proteobacteria and the rest 6 strain all belonged to γ-proteobacteria,of which strain BJ8 was a species of Pseudoalteromonas,strain BJ2-BJ5 and BJ7 were members of genus Psychrobacter.Phylogenetic analysis also indicated that bacteria of genus Psychrobacter of the isolates formed a relatively independent phylogenetic cluster in comparison with other bacteria belonged to genus Psychrobacter.     

Information for authors

正1 Aims and Scope Advances in Polar Science(APS)is an international,peer-reviewed journal jointly sponsored by the Polar Research Institute of China and the Chinese Arctic and Antarctic Administration.APS is a comprchensive academic journal dedicated to presentation of multi-disciplinary achievements in Arctic and Antarctic expeditions and research.Its primary purpose is to publish achievements in fundamental research,applied     

Advances in Polar Science CONTENTS(Volume 25,2014)

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Guide to Authors： Journal of Mountain Science

<正>AIMS AND SCOPE(Editorial Policy)The Journal of Mountain Science(JMS)is devoted to mountains and their surrounding lowlands-ecoregions of particular global importance,with a particular emphasis on the important highlands/mountains in the world,such as the Tibetan Plateau,the Himalayas,the Alps,the Andes,the Rockies and many other mountain ranges of our planet.     

Journal of Mountain Science(JMS)

<正>The Journal of Mountain Science(JMS),founded in2004,is an international English-language journal on mountain sciences.JMS is supervised by the Chinese Academy of Sciences(CAS),sponsored by the Chengdu Institute of Mountain Hazards and Environment,CAS,published by Science Press China,and distributed by Springer exclusively throughout the world(excluding Mainland China).The JMS is published bimonthly,fulltexted in SpringerLink and CNKI,indexed/abstracted by     

Relationship of Arctic sea ice and Northern Hemispheric 500 hPa Polar vortices

Using the NCEP/NCAR reanalysis monthly 500 hPa height data on a 2.5 latitude-longitude grid and 1°×1° sea ice data,the polar vortex area,intensity index and arctic sea ice area index are calculated respectively,and the meridional distribution,period variation and the abrupts in the long range trend are analyzed to study their relationship.The results show that the meridional distribution of sea ice and polar vortex h-ave distinctive difference,the relative positions of them are different in the eastern and western hemispheres,and exept they have periods of 4 months,quasi half year,quasi year,4-5 years and 10 years commonly,and each of them has its own respective variation as well.The sea ice area is decreasing apparently since 1980's,so is the polar vortex area,but their abrupt changge time are different totally.The area of sea ice and polar vortex has prominent positive correlation,but the relationship of sea ice intensity,polar vortex intensity,polar vortex area is complicated.     

Author Index for Journal of Mountain Science Volume 11,2014,pp 1-1656

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Information for Authors

<正>The Journal of Ocean University of China(Oceanic and Coastal Sea Research)is a comprehensive academic quarterly sponsored by the Ocean University of China,published one volume per year.This journal is devoted to the publication of the theoretical and applied research