漳州地震台形变仪器升级改造情况介绍

漳州地震台于2016~2019年完成垂直摆倾斜仪、钻孔体应变仪两套形变仪器的更新改造工作。经安装调试进入试运行,通过试运行期间数据质量分析、更新前后数据对比,证明升级改造后观测系统试运行结果总体优良。     

数字化形变观测干扰识别

收集整理了山东省数字化形变台自观测以来的固体潮分钟值资料，论述了气压、雷电、洞室进入、仪器故障及附加载荷等干扰因素对数字化形变高频记录的影响及其机理，为利用数字化资料及时识别干扰、准确捕捉短临地震异常提供了可借鉴的实例。     

常熟地倾斜几种预报方法及指标的探索

使用江苏省常熟地震台SQ－70石英丝水平摆倾斜仪中强震前后的观测资料，通过大量计算和分析，提取地震前兆，确定江苏形变学科可行的预报指标。     

延庆综合地震台形变观测干扰特征分析

以延庆综合地震台2018~2019年SS-Y型伸缩仪、SSQ-2I型水平摆倾斜仪、DSQ型水管倾斜仪3套形变仪器的数字观测资料为基础,分析形变观测的主要干扰因素及其机理,为识别形变观测数据异常提供参考。     

江苏体应变观测质量和强震响应能力综合分析

跟踪分析了江苏省“九五”期间建设的5套钻孔体应变仪观测资料的完整性、稳定性及观测精度等，利用观测资料分钟值，对2001-2004年发生在台湾地区的强震记录特征进行了研究，结果表明：1）江苏5套体应变仪的观测精度波动较大，受仪器故障、降雨雷击、气压等因素的干扰，观测资料的完整性、稳定性欠佳，各台都存在着不明原因的突跳现象；2）大部分体应变分钟值能清晰地记录到台湾地区6级以上地震，其中南通体应变仪的灵敏性最好；震级越大形变波衰减时间越长，波幅也越大，波形更似尖锐脉冲；3）徐州、溧阳、南通3台以应变仪在部分台湾地震震前十几分钟至数小时，能记录到显著的震前应力异常变化，如果这种变化是震前应力改变的反映，则对于提高地震预警能力和临震预报能力具有重要意义。     

数字化形变台站观测资料质量跟踪分析

厦门地震台在“九·五”期间安装了 4套数字化形变观测仪器。应用全国形变资料评比计算方法 ,结合EIS2 0 0 0与DEFORMATION计算软件 ,对新安装的 4套仪器 2 0 0 1～ 2 0 0 2年观测资料的质量进行了跟踪分析并给出了计算结果。结果表明 :(1) 4套仪器从安装以来 ,随着观测环境与仪器的逐渐稳定以及观测人员技术熟练程度的提高 ,资料内在精度都有提高 ;(2 )海潮干扰是影响厦门台形变资料内在精度的主要因素之一。     

上海形变固体潮资料干扰因素分析

利用上海形变观测记录到的固体潮资料,分析气压、雷电、洞室装修、仪器故障及环境等干扰因素对形变固体潮记录的影响,为利用数字化资料及时识别干扰、准确捕捉短临地震异常提供了可参考的实例.     

泰安地震台SSQ-2数字水平摆曲线畸变分析

对山东泰安地震台数字化水平摆10年的观测资料中的典型畸变现象进行了分类,具体为:1)大幅度漂移,趋势性改变;2)单日固体潮畸变;3)多日固体潮畸变伴频繁掉格;4)频繁掉格,固体潮无明显畸变。NS分量畸变以趋势改变、固体潮升降变化为主,EW分量畸变以频繁掉格为主。映震能力:对震中距2 000~5 000 km大于7级以上的地震有反应,甚至远于5 000 km的极远震也有为数不少的震前畸变出现。     

JB－72水平摆倾斜仪防靠摆装置简介

ＪＢ－７２水平摆倾斜仪防靠摆装置简介李兰生，刘建华（江苏省地震局徐州地震台２２１００８）１ＪＢ－７２水平摆倾斜仪及靠摆现象ＪＢ－７２水平摆倾斜仪作为连续定点形变观测的一种高精度仪器，能清晰记录到地球固体潮汐和地壳的多种细微变化，为研究地震活动提供连续...     

关于连通管数据受固体潮影响的实验

在河北省永年台的山洞,安置金属水平摆倾斜仪和座式连通管进行地形变观测。从观测成果中,我们不难看到,倾斜仪测到了固体潮。既然,连通管的精度不低于倾斜仪,它也应能测到固体潮。但是,连通管目前是人工非连续性观测,为了验证,我们进行了实验。     

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     

Influence of livestock soil eutrophication on floral composition in the Pyrenees mountains

Livestock behaviour in the Pyrenees includes free grazing and a long resting period that provokes the accumulation of dung and urine in some places,so-called camping areas. The aims of this study were （i） to analyze any change in floral composition,and in nutritional and chemical contents of plants in a livestock camping area; and （ii） to relate the floral composition with soil chemical properties. In a linear transect,five sampling zones were established,from the centre of the camping area to the surrounding Nardus stricta-dominant pasture. The above ground plant biomass and the topsoil were sampled in each zone with 6 replicates per zone. Plant species were classified and weighed to calculate above ground biomass,nutritional and chemical contents,and Shannon diversity and evenness indices. Additionally,soils were sampled in two periods,at the beginning and at the end of grazing period. Soil available nutrients （nitrate,ammonium,phosphorus,potassium,calcium and magnesium）,total nitrogen,organic carbon and pH were measured.
Plant chemical contents （protein,lignin and others） were significantly related to the proportions of grasses,legumes and other plants; so,the protein content is positively correlated with legumes plant biomass while lignin content is negatively correlated with grasses. Both plant and soil nutrients increased linearly towards the centre of the camping area. However,the relationship among plant species richness,diversity and evenness relative to its position along the studied transect was bell-shaped. From the outskirts to the centre of the camping area,plants with low nutrient demand were progressively replaced by those with medium and high nutrients demand and by pioneers.
Nardus stricta-dominant pasture has low plant diversity and plant nutrient content as well as a poor soil nutrient availability. The presence of the camping area introduced patches with more soil nutrients and new species in the large spatial scale. However at a small spatial scale,the strong soil nutrien     

General Table of Contents(Vol.11,2014)

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介绍GPS定位中的几个概念

文章概略介绍了利用卫星进行定位的原理 ;由卫星信号传播、信号接收和SA政策等引起的理论误差 ;给出了多种快速、高精度定位的工作模式和观测点选择的原则 ;列出了将WGS - 84坐标转换为我国坐标的公式及解算参数的具体方法 ,供读者在GPS工作中参考。