中文摘要：

“地球系统科学数据共享网”是国家科学数据共享工程的试点之一，同时也是国家科技基础条件平台的组成部分，其目的是为地球系统科学的基础和前沿研究提供数据支撑服务。该系统平台（GEODATA）是一个分布式的数据交换体系，总体设计思路是利用元数据整合分散的地学数据资源，通过业务逻辑的技术封装提供地学数据的网络共享。设计的GEODATA体系是一个五层结构，即门户层、共享业务层、核心服务层、资源管理层和网络平台层，具体的业务逻辑处理功能被分解为13个功能模块。GEODATA的研发技术路线包括总中心和分中心两大部分，其中总中心采用“地学数据超市”理念进行功能组织；分中心基于Web Services技术，采用分布式数据管理的模式进行设计。两者的业务逻辑基于元数据的生命周期被串联成一个有机的整体。GEODATA原型系统利用J2EE开发，实现跨平台部署。应用实践表明这种平台构架模式非常适用于地球系统科学的学科特点。

英文摘要：

As one of the experiment units of the China National Scientific Data Sharing Program launched in 2002, the Chinese Earth System Science Data Sharing Network （referred to as GEODATA） provides basic data services for ESS research. The GEODATA platform is a typical clearinghouse consisting of a general center and distribution sub-centers. The general structure of GEODATA is composed of 5 parts, which includes the website portal, the data sharing business tier, the core service tier, the data sources management tier and the network foundation. 13 function modules are efficiently organized in this architecture. Driven by user requirements, the general center＇s functions are designed as a ＂geosciences data supermarket＂, and they are developed through metadata techniques. Distribution sub-centers are developed by Web Services techniques. All the function modules between general center and sub-centers are organized according to the life cycle of metadata in the data sharing business. The GEODATA prototype system is developed with the cross platform program and applied within the China National Scientific Data Sharing Program （http..//www. geodata, cn）.