Mercury is a service oriented web-based distributed metadata management system for finding and retrieving biogeochemical, ecological, and other land-based data. ORNL DAAC's implementation of Mercury facilitates the following search mechanisms:

• Simple Text Search
  (the search tool located on all our pages)
  searches the following:
• Metadata, Archived ORNL DAAC Data Sets
• Web Site Pages
• Both Metadata and Web Site Pages


• ORNL DAAC Advanced Product Search
  (Available from the Data Tools Menu)
  searches the following:
• ORNL DAAC Archive Data Sets
• External Data Sources
• Land Validation Data
• Regional and Global Data
• LPDAAC MODIS and ASTER Products
• Long Term Ecological Research (LTER) Network
• Organization of Biological Field Stations (NBII)

External data sources are metadata registeries of biogeochemical and environmental data distributed by other data centers which have been identified by the ORNL DAAC's User Working Group (UWG) as important for the global change research community.

The ORNL DAAC provides the following Mercury resources:

• Mercury Web Site
• ORNL DAAC Metadata Editor
• A Introductory Mercury Tutorial
• A Technical Mercury Presentation