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DefinitionThe volumetric soil moisture on the top 100cm of the soil layer.
ValidityDaily mean
Comment

Computed from instantaneous values at 00, 06, 12 and 18Z

To interprete soil moisture and to compare different models the Soil Wetness Index (SWI) is used:

SWI = (soil_moisture - wilting_point) / (field_capacity - wilting_point).

Field capacity corresponds to the maximum value that the model can sustain without precipitation for more than a few hours. The vegetated fraction of the soil evaporates at the maximum rate for soil moisture larger than field capacity and stops evaporating below the permanent wilting point, with a continuous variation between the two extremes.
All Partners are asked to provide the wilting point and the field capacity for each grid point.

GRIB 2Parameter Number
Parameter
Discipline= 2 Land surface products  
Parameter Category= 0 Vegetation/biomass
 = 22  Soil Moisture
 
1Scaled value of first 0GRIB 2 and C-code for: Perturbed forecast, Control forecast, Perturbed re-forecast and Control re-forecast
Level
Type of first fixed surface= 106 Specified height level above ground m
Scale factor of first Type of second fixed surface= 1060 
Scaled value Scale factor of first fixed surface= 0Scale factor 0
Type of second fixed surface= 106
Missing
Scale factor of second fixed surface= 1
 
Scaled value of second fixed surface= 10
1 metre