The ORNL DAAC announces the release of four data sets from the Hydrology, Soils, and Topography category associated with the International Satellite Land-Surface Climatology Project (ISLSCP) Initiative II.
ISLSCP II Total Plant-Available Soil Water Storage Capacity of the Rooting Zone. Data set prepared A. Kleidon. For this data set, the geographic distribution of the total plant-available soil water storage capacity of the rooting zone was derived using two separate methods and on a 1.0 degree global grid.
ISLSCP II River Routing Data (STN-30p). Data set prepared by B. Fekete and C.J. Vorosmarty. The Simulated Topological Network (STN-30p) data set provides the large-scale hydrological modeling community an accurate representation of the global river system at 0.5 degree and 1.0 degree spatial resolution. STN-30p can be viewed as a river network which would exist if sufficient surface runoff was available to form river channels everywhere.
ISLSCP II Global Gridded Soil Characteristics. Data set prepared by R.J. Scholes and E. Brown de Colstoun. This data set provides two-dimensional gridded maps of selected soil parameters, including soil texture, at 0.5 degree and 1.0 degree spatial resolution for two soil depths.
ISLSCP II HYDRO1k Elevation-derived Products. Data set prepared by K.L.Verdin. This data set contains elevation and elevation-based parameters (elevation, slope, aspect, and Compound Topographic Index (CTI)) at 0.5 degree and 1.0 degree spatial resolutions that were developed to support a wide variety of global modeling activities through the International Satellite Land Surface Climatology Project (ISLSCP) Initiative II data collection.
International Satellite Land-Surface Climatology Project (ISLSCP)
The ISLSCP Initiative II data collection is designed to support modeling studies of the global carbon, water and energy cycle. This data collection contains 50 global time series spanning the ten-year period 1986 to 1995 compiled under the guidance of Forrest Hall and colleagues at NASA's Goddard Space Flight Center. The data for Initiative II were acquired from a number of U.S. and international agencies, universities, and institutions, then co-registered to equal-angle grids of one degree, one-half and one-quarter degree resolution and reformatted into a common ASCII format.
The collection includes a variety of remotely sensed data sets ranging from visible to microwave wavelengths. The data sets also include improved topography, surface radiation, near-surface meteorology, precipitation, runoff, soils, and vegetation data sets that can be used in a variety of interdisciplinary research activities. Several data sets to support global carbon and biogeochemical studies are also provided.
The ORNL DAAC is a NASA-funded data center archiving and distributing terrestrial ecology and biogeochemical dynamics data.