[Sensor_Name: Short_Name='SOIL MOISTURE PROBE']
SOIL IMPEDANCE DATA (FIFE)Entry ID: FIFE_SOIL_IMP
Abstract: The purpose of this research was to characterize the soil moisture distribution in the FIFE study area. Daily measurements of the soil dielectric properties were obtained at five locations throughout the FIFE study area during the 1987 Intensive Field Campaigns (IFC). Calculated soil volumetric water contents were compared with gravimetric soil moisture measurements collected at the same locations ... by the FIFE staff science team. Examination of the data revealed that the impedance probe is a more consistent source of time series information than traditional measurements, and is potentially more closely linked to the physical parameters. The dielectric constant of soil is a potentially sensitive indicator of soil moisture. Since, the magnetic permeability of all naturally occurring soils is near that of free space, dielectric measurements serve to fully characterize the electromagnetic response of soils. Many of the indirect methods of soil moisture measurement permit frequent or continuous measurements in the same place with only small expenditure of time. Thus, changes in water content with time can be approximated. The soil impedance is sensitive to the moisture content of the soil and can be used to calculate the volumetric water content of the soil. Soil impedence techniques using probes have been demonstrated to show small-scale diurnal variations that would be completely missed by small-scale spatial variations in the gravimetric sampling scheme. Furthermore, the basically non-destructive nature of the fixed probes minimize the impact of the sampling technique on the dynamic behavior of the region under study.
Data Set Citation
Dataset Originator/Creator: UNGAR, S.G.
Dataset Title: SOIL IMPEDANCE DATA (FIFE)
Dataset Release Date: 1994
Dataset Release Place: Oak Ridge, Tennessee, U.S.A.
Dataset Publisher: Oak Ridge National Laboratory Distributed Active Archive Center
Data Presentation Form: Online Files
Dataset DOI: doi:10.3334/ORNLDAAC/108Online Resource: http://mercury.ornl.gov/ornldaac/send/query?term2=108&term2attribut...
Start Date: 1987-05-24Stop Date: 1989-08-10
ISO Topic Category
Data Set Progress
Role: TECHNICAL CONTACT
Phone: (301) 286-4007
Email: ungar at highwire.gsfc.nasa.gov
NASA Goddard Space Flight Center Code 923 BLDG 22, RM G38
Province or State: MD
Postal Code: 20771
Role: DIF AUTHOR
Phone: (865) 574-7447
Email: uso at daac.ornl.gov
ORNL DAAC User Services Office Oak Ridge National Laboratory
City: Oak Ridge
Province or State: TN
Postal Code: 37831-6407
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 1994-07-24
Last DIF Revision Date: 2011-05-20