Graphs of biomass dyanmics and climate data for grassland sites have been added to the global terrestrial Net Primary Production (NPP) reference database at the ORNL DAAC. The NPP database has been compiled by Dick Olson and Jonathan Scurlock under the auspices of the International Geosphere-Biosphere Programme and funding from the Terrestrial Ecology Program of NASA's Office of Earth Science. Browsing through the graphs will help users to select data of interest, and to see relationships between grassland biomass changes and driving climate variables such as rainfall. Graphs are presently available for 14 of the 31 grassland sites.
In addition, two more well-known worldwide datasets are available for browsing and downloading from the ORNL DAAC's NPP Web pages. The Osnabruck dataset contains 720 NPP sites worldwide synthesized by Dr. G. Esser and Prof. H. Lieth, and the Terrestrial Ecosystem Model (TEM) dataset contains data from 16 vegetation types, assembled by staff at the Ecosystems Center, Marine Biological Laboratory in Woods Hole, Massachusetts. The Osnabruck dataset is also available free from the ORNL DAAC User Services Office as a 20-page Technical Memorandum.