The term cyberinfrastructure (CI) refers to a new research environment that supports integration of geographically distributed computing and information processing services to enable a new level of data-intensive collaborative science enterprise. It includes high-performance data management and storage hardware and software, combined with secure data access and advanced information- and knowledge-management technologies and a variety of search, analysis, visualization, modeling and collaboration tools linked over high-speed networks, to create an enabling end-to-end framework for scientific discovery. CI applications in earth sciences span such disciplines as earthquake modeling and prediction, ecology, atmospheric sciences, hydrology and oceanography.