The Janus database: providing worldwide access to ODP and IODP data
In 1997, the Ocean Drilling Program began using a relational data management system and applications called Janus to store and retrieve data collected on the drill ship JOIDES Resolution. Since then many new web-based data access queries have been added, and some modifications to the database have been made. The database modifications were needed to allow the migration of pre-Janus data to the database, to incorporate modifications in the calibration procedures, to improve database performance, to add storage and access to various digital images, and to add access to scanned digital images of original paper data. These modifications were made by staff at Texas A&M University and reflect enhancements required by the Ocean Drilling Program (ODP) scientific community.
With the start of the Integrated Ocean Drilling Program (IODP) an opportunity exists to make additional enhancements to the existing Janus database. As such, two major areas are identified: developing a core description program(s) and providing data visualization tools for improved analysis. Efforts to use Java-based programs to build these enhancements are cited. Geographic information systems (GIS) technology is being explored as a viable approach to providing these enhancements.
Building an understanding of the Janus database is best accomplished by visiting the Web site http://iodp.tamu.edu/database. Available data can be reviewed using the online ‘Database overview’ option. A list of all queries that are available in Janus can be acquired through the online ‘Data search’ option.
Figures & Tables
New Techniques in Sediment Core Analysis
Marine sediment cores are the fundamental data source for information on seabed character, depositional history and environmental change. They provide raw data for a wide range of research including studies of climate change, palaeoceanography, slope stability, oil exploration, pollution assessment and control, seafloor survey for laying cables, pipelines and construction of seafloor structures. During the last three decades, a varied suite of new technologies have been developed to analyse cores, often non-destructively, to produce high-quality, closely spaced, co-located downcore measurements. These techniques can characterize sediment physical properties, geochemistry and composition in unprecedented detail. Palaeoenvironmentally significant proxies can now be logged at decadal, and in some cases, annual or sub-annual scales, allowing highly detailed insights into climatic history and associated environmental change. These advances have had a profound effect on many aspects of the Earth Sciences and our understanding of the Earth's history.
In this volume, recent advances in analytical and logging technology and their application to the analysis of sediment cores are presented. Developments in providing access to core data and associated datasets, and advances in data mining technology in order to integrate and interpret new and legacy datasets within the wider context of seafloor studies are also discussed.