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ORNL DAAC Outage June 14

Beginning at 8:00 a.m. Eastern Daylight Time on Saturday, June 14, 2003, the ORNL DAAC's Web and FTP sites will be unavailable because of an equipment move. The outage is expected to last from 4 to 12 hours.

Grassland Validation Data Available

The ORNL DAAC has released six data sets from the Prototype Validation Exercise (PROVE), which was conducted on a grassland-shrub site in New Mexico in May 1997.

Mercury EOS Announced

April 21, 2003:

Mercury EOS, the ORNL DAAC's new search and order system that works with NASA's EOS ClearingHouse (ECHO), is now operational. The system allows free text, fielded, spatial, and temporal searching, and it allows orders to be a combination of physical media and electronic delivery. Mercury EOS is available on the ORNL DAAC home page's "Finding Data" pulldown menu.

Global Flux Data Released

The ORNL DAAC has released a global data set pertaining to fluxes of carbon dioxide and water from vegetation.

"Net Carbon Dioxide and Water Fluxes of Global Terrestrial Ecosystems, 1969-1998" examines the variability of net surface carbon assimilation, net ecosystem surface respiration, and net surface evapotranspiration among and within vegetation types. The data were compiled from scientific papers published between 1969 and 1998.

Global Root Data On-Line

The ORNL DAAC announces the release of four global data sets on root characteristics. The data were compiled from a variety of scientific literature dating as far back as the 1950s.

U.S. Vegetation Data Available

The ORNL DAAC announces the release of two U.S. data products in its Vegetation Collections.

New NPP: Eastern U.S. Forests

The ORNL DAAC has released a net primary productivity (NPP) data set pertaining to the mortality of woody biomass in eastern U.S. forests.

"NPP Multi-Biome: Production and Mortality for Eastern U.S. Forests, 1962-1996" contains estimates of the annual mean aboveground wood increments for hardwood and softwood forests in 1956 counties of the 28 eastern states. The estimates are based on forest inventory data from the 1960s to the 1990s.

NPP Web Map Server

A Web map server is now available for accessing net primary productivity (NPP) data maintained by the ORNL DAAC.

The map server helps users more readily find NPP data for 61 locations around the world. Users simply "Query" the map and select a site marker. In response, the server provides links to all the NPP data sets associated with that site. Users can view six map layers, zoom in on areas of interest, and query multiple features.

Grassland NPP Estimates Compiled

A compilation of net primary productivity (NPP) estimates for grasslands has come on-line at the ORNL DAAC. Users will find the compilation handy for comparative study and ecosystem modeling.

Gridded NPP Estimates Revised

A revised version of gridded net primary productivity (NPP) estimates is now available from the ORNL DAAC.

Data providers revised the data set entitled "NPP Multi-Biome: Gridded Estimates for Selected Regions Worldwide, 1989-2001" in the course of readying the research for publication. If you obtained this data set before February 8, 2003, you may want to replace your files.

To learn more about the revisions, see our Data Revisions page.