*
Soil moisture/temperature and snow depth data are only available at select SNOTEL
sites.
NOTICE TO USERS: Soil Moisture
Equation Change Implemented.
The NRCS, in cooperation with the Agricultural Research Service (ARS),
has implemented a new Soil Moisture Equation for use on select Soil
Climate Analysis network (SCAN) sites. This work has been peer reviewed
and published (Seyfried, M.S., L.E. Grant, E.Du, and K Humes. 2005.
Dielectric loss and calibration of the hydra probe soil water sensor.
Vadose Zone J. 4:1070-1079).
On February 19, 2010, selected SCAN sites were remapped with the new
'loam' equation, which has been shown to better represent the volumetric
moisture content in these soils (Seyfried et.al 2005). Further
evaluation is currently being done before the new equation is
implemented on the remaining SCAN sites and the SNOTEL database. Site
metadata will reflect this change and all historic and current data will
be calibrated using the same equation (Historical soil moisture data will be remapped by March 5, 2010). Additional information concerning
the original 'silt' equation is available (Vitel,
Inc. 1994. Hydra soil moisture probe user's manual, version 1.2. Vitel
Inc., Chantilly, VA).
All data
contained herein are provisional and subject to revision.