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DefinitionLiquid non-frozen volumetric soil moisture on a soil layer.
Validityinstantaneous
Comment

 Sea points should be set as missing values.

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Soil layers must always start from 1 (0 soil level is the surface by default which is not encoded).


WMO GRIB2 definition

Parameter
Discipline2land surface products
Parameter category3soil products
Parameter number10
liquid volumetric soil moisture (non-frozen)
Level
(Meteo-France only)
Type of first fixed surface
106depth below land surface (m)
151soil level**
Scale factor of first fixed surface0 
Scaled value of first fixed surface0
/1/2/3/.../X-1n-1 for the nth soil layer
 
Type of second fixed surface
106 or 167***
"depth below land surface (m)" or "bottom of root zone"***
151soil level*
Scale factor of second fixed surface
1 or all bits to 1***(cm) or missing***
0 
Scaled value of second fixed surface
value in cm or all bits to 1***1 or missing***

*** valid for the 3rd Meteo-France layer (from surface to the bottom of root zone)

1/2/3/.../Xn for the nth soil layer

**newly approved level type (WMO release in May 2016)