中国极地冰冻圈网络数据库建设

BUILDING OF CHINESE POLAR CRYOSPHERE NETWORK DATABASE SYSTEM

中国极地冰冻圈数据库是“中国极地科学数据库”的子数据库之一 ,它是我国极地科学研究的一项基础性工作。已建成的中国极地冰冻圈网络数据库主要包括冰川物理特性、冰川化学数据、海冰、气象、遥感和地理信息系统等 6个数据子库 ,其中遥感数据由于数据量大 ( 30G) ,在线仅提供数据目录 ,其余 5个数据子库在线数据量达 1 .5G左右。该数据库系统利用MicrosoftWindows 2 0 0 0Server作为Web服务器 ,选择MicrosoftSQLServer 7.0作为数据库管理软件 ,利用InternetInformationServer 5 .0和SybasePowerDynamo配置因特网服务器 ,功能上可以实现WWW服务和FTP服务。整个系统采用了因特网 (Internet)与客户机 /服务器 (Client/Server)相结合的技术 ,用户在权限范围内可以通过WWW服务网址方便地实现对网上资源的检索、浏览、打印。

Based on Microsoft Windows 2000 Server operating system, the CIPCDS was established by database management system SQL Server 7.0. It is made up of six sub databases: glacier physics, glacier chemistry, sea ice, meteorology, remote sensing and GIS map. All those basic information and observational data of ice sheets, glaciers, frozen earth, snow, sea ice, topography are stored in 150 tables. The former four sub databases mainly include: glacier movement, radar survey, glacier temperature, snow/ice crystal, density, rigidity, mass balance; pH value, conductivity rate, main ions, isotopes, organic substances, gas of surface snow, snow pit and ice core; sea ice extent and areas, sea ice thickness and salinity; all kinds of weather elements on the ground and upper air. The last two sub databases mainly include: remote sensing images for the polar regions, topographic data. The homepage and web pages of CIPCDS were made by Sybase Power Dynamo, Internet Information Server 5.0 and Front Page 2000. Two protocols in data translation in CIPCDS: HTTP and FTP was established for internet users, while for intranet users, a CIPCDS data management software by Power Builder 7.0 was manufactured independently. Users admitted by CIPCDS can query, download, manage, and export all information they concerned.