Oak Ridge National Laboratory Distributed Active Archive Center

nasa-ornldaac-109

Soil Moisture Data: Peck (FIFE)

ABSTRACT: Water content measurements by gravimetric methods involve weighing a wet sample, removing the water via drying in an oven, and reweighing the sample to determine the amount of water removed. Water content then is obtained by dividing the difference between wet and dry masses by the mass of the dry sample to obtain the ratio of the mass of water to the mass of dry soil. When multiplied by 100, this becomes the percentage of water in the sample on a dry-mass (or, as often expressed, on a dry-weight) basis. Soil moisture determined using the gravimetric method was measured at 800 sites along 24 transects. These transects were over flown by the airborne Gamma Radiation System used to measure soil moisture. These data are useful for comparison of airborne and ground soil moisture data. This analysis for the airborne Gamma Radiation System, using completely independent soil moisture data showed that the root mean square error of 97 flights was 3.02 percent soil moisture, with a bias of less than 0.5 percent soil moisture (Carroll et al., 1988).

daac.ornl.gov

http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=109

Identified by : FIFE_PECK_SM

This dataset was released on January 01, 1994.

The time range for this dataset is June 02, 1987 to August 09, 1989.

The spatial range for this dataset is 38.97° to 39.12° latitude, and -96.62° to -96.48° longitude. map (center)

DOI : 10.3334/ORNLDAAC/109
Also known as :

• dataset oai:mercury-ops2.ornl.gov:ornldaac_109 (ornl lexicon)
• dataset oai:mercury.ornl.gov:ornldaac_109 (ornl lexicon)