Environmental History of Lago di Tovel,Trento, Italy,Revealed by Sediment Cores and 3.5 kHz Seismic Mapping   总被引：1，自引：0，他引：1  

Thomas?KulbeEmail author  Flavio?Anselmetti  Marco?Cantonati  Michael?Sturm 《Journal of Paleolimnology》2005,34(3):325-337

Proxy data from a total of 30 sediment cores and information from a seismic survey show that the sedimentological and limnological history of Lago di Tovel (1178 m a.s.l.) has been significantly influenced by slope dynamics of its mountainous catchment. The lake represents a dead-ice lake with pro-glacial deposits at the base of its sedimentary record. A prominent lake level rise in 1597/1598 that increased maximum water depth from ∼20 to 39 m caused slope instabilities, leading to the deposition of mass-flow sediments with a maximum thickness of 2.5 m in the northern part of the lake and less than 50 cm in the southern part, resulting in a total volume of more than 113,000 m³. Consequently, a rough lake bottom morphology was produced, which led to distinct differences in sedimentation rates of 0.07 cm yr⁻¹ on sills and 0.18 cm yr⁻¹ within depressions. The age of the top of the mass-flow deposits was used to validate the ages of the younger, laminated sediments, which were dated by ²¹⁰Pb and ¹³⁷Cs. Lithological investigations showed that the sediments below the mass-flow deposits are also laminated and that they were not bioturbated. The long-term meromixis of Lago di Tovel is therefore mainly due to a combination of its topographic setting and the 5-month period of ice cover. Both prevent effective mixing of the lake by strong winds during spring and autumn. Distinct spatial differences in sediment distribution within the lake show that it is risky to interpret proxy data from only one coring site, even if the lake is very small. This is especially true in mountainous areas, where rock falls, mass movements, and slope instabilities of a significant size may have considerable effects on lakes.  相似文献   

Molecular Line Parameters for the “MASTER” (Millimeter Wave Acquisitions for Stratosphere/Troposphere Exchange Research) Database     

A.?PerrinEmail author  C.?Puzzarini  J.-M.?Colmont  C.?Verdes  G.?Wlodarczak  G.?Cazzoli  S.?Buehler  J.-M.?Flaud  J.?Demaison 《Journal of Atmospheric Chemistry》2005,51(2):161-205

In order to investigate the upper troposphere/lower stratosphere (UTLS) region of the earth's atmosphere, ESA/ESTEC (European space agency) is considering the opportunity to develop the spaceborne limb sounding millimeter sensor “MASTER” (millimeter wave acquisitions for stratosphere/troposphere exchange research). This instrument is part of the “atmospheric composition explorer for chemistry and climate interactions” (ACECHEM) project. In addition, ESA/ESTEC is developing the “MARSCHALS” (millimeter-wave airborne receiver for spectroscopic characterization of atmospheric limb sounding) airborne instrument which will demonstrate the feasibility of MASTER. The present paper describes the line-by-line database which was generated in order to meet at best the needs of the MASTER (or MARSCHALS) instrument. The linelist involves line positions, line intensities, line broadening and line shift parameters in the 294–305, 316–325, 342–348, 497–506 and 624–626 GHz spectral microwindows. This database was first generated for the target molecules for MASTER (H₂O, O₃, N₂O, CO, O₂, HNO₃, HCl, ClO, CH₃Cl, BrO). In addition, ten additional molecules (SO₂, NO₂, OCS, H₂CO, HOCl, HCN, H₂O₂, COF₂, HO₂ and HOBr) had also to be considered in the database as “possible interfering species” for the retrieval of the target molecules of MASTER. The line parameters were derived, depending on their estimated accuracy, (i) from a combination of spectral parameters included in the JPL and HITRAN catalogs (ii) from data taken into the literature or (iii) using data obtained through experimental measurements (and/or) calculations performed during the present study.  相似文献   

应用Arc/Info建立湖北省区域稳定性评价空间数据库   总被引：1，自引：0，他引：1  

刘春国  薛重生 《国土资源遥感》2001,12(3):54-57

以Arc/Info为基本工具,以遥感信息为获取、更新数据库数据的主要信息源,结合前人地学资料,建立了湖北省区域稳定性评价空间数据库,阐述了该空间数据库的内容、功能、应用和意义.  相似文献   

计算机辅助地质填图系统中GIS和DBS的集成探讨   总被引：4，自引：1，他引：3  

方世明  张夏林  李伟忠  汪新庆  刘刚 《物探化探计算技术》2001,23(3):272-276

新一轮的国土资源大调查将全成引入计算机技术,实现区谱填图的全程计算机辅助化,其中“多S”集成应用是关键问题,目前GIS平台上已把GIS,CADS,GPS集成为一体,进一步是将DBS和GIS集成应用,这可以通过建立主题数据库,使用公共数据模型和开发“通信中间件”来实现。  相似文献   

数据光盘库及数据格式   总被引：1，自引：0，他引：1  

管烨 《地球学报》2001,22(6):513-516

数据光盘库课题是“深部地球物理探测数据共享与对比研究”项目下的子课题,从1998年初开始至2000年底结束。课题在各专业课题制定的专业方法数据入库技术规定的前提下,调研了各单位数据保存状态,协调提交的入库数据,并编辑,整理。利用ACCESS软件,建立一套可实现数据多种格式转换,查询,刻录,共享并可广为使用的数据光盘交换系统。同时,协调了各地球物理专业方法的数据格式,并对各种专业数据格式进行了比较研究。采用先进的计算机技术和光盘介质,刻录并保存了大量而珍贵的新老深部研究数据。  相似文献   

基于分布式数据库原理实现辽宁地震财务会计报表管理系统     

程海生  杨光  方旭 《东北地震研究》2005,21(2):75-80

本文简要介绍分布式数据库原理，并利用其软件分层结构(4层)实现了辽宁地震财务会计报表管理系统。该系统各层任务明确，下层为上层提供服务，相互间分工协作，共同完成辽宁地震财务会计报表管理系统的各项功能。  相似文献   

《水质数据库表结构与标识符规定》制定与应用     

毛学文  彭辉 《水文》2005,25(6):41-45

本文就《水质数据库表结构与标识符规定》的主要内容和制定过程中的一些技术考虑进行了阐述．并就标准与应用系统需求和功能设计如何结合进行了分析，以期对今后标准的贯标和应用奠定良好基础。  相似文献   

基于ArcSDE C API的ArcSDE客户端实现方法   总被引：2，自引：0，他引：2  

芮小平  杨建宇  梁艳萍 《物探化探计算技术》2005,27(4):338-342

为了灵活的访问ArcSDE管理的空间数据,可以利用ArcSDE提供的C API函数开发自己需要的客户端。这里介绍了ArcSDE组织空间数据的原理,讨论了利用ArcSDE提供的C API函数来自定义ArcSDE客户端的实现过程,并给出了用ArcSDE提供的C API函数存取空间数据的方法。将本方法应用到国产优秀W ebGIS软件GeoBeans中,取得了良好的效果。  相似文献   

测氡数据软件的设计     

郭俊丽  杨浩 《物探与化探》2005,29(6):554-556

在论述了测氡法的基本原理、工作方法及数据处理的基础上,针对测氡数据放射性衰变的特点和在实际工作中受干扰因素较多等原因,对实测数据进行分析、校正与处理.从实际应用出发,设计开发了可视化和集成化的测氡数据处理软件系统,便于对实测数据进行预处理、校正与成图.  相似文献   

Multi-resolution seamless image database     

WANG Mi GONG Jianya LI DerenWANG Mi  Ph.D.Candidate  National Laboratory for Information Engineering in Surveying  Mapping  Remote Sensing  WTUSM  Luoyu Road  Wuhan  China 《地球空间信息科学学报》2000,3(3):52-56

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