GRIB-API definition
UERRA details
| Definition |
It is meant to be used together with the type of level "soil level" to encode the depth of the level at each grid point. | |
| Validity | instantaneous |
| Comment |
Positive downward. Soil levels must always start from 1 (0 soil level is the surface by default which is not encoded) |
WMO GRIB2 definition
| Parameter | ||
|---|---|---|
| Discipline | 2 | land surface products |
| Parameter category | 3 | soil products |
| Parameter number | 27 | soil depth** |
| Level | |||
|---|---|---|---|
| Type of first fixed surface | 1 | 151 | soil level**ground or water surface |
| Scale factor of first fixed surface | all bits to 1 | 0 | missing |
| Scaled value of first fixed surface | all bits to 1 | 1/2/3/.../X | n for the nth soil levelmissing |
| Type of second fixed surface | 151 | all bits to 1 | missingsoil level** |
| Scale factor of second fixed surface | 0 | all bits to 1 | missing |
| Scaled value of second fixed surface | 1/2/3/4 | all bits to 1 | missingn-th soil level |
**newly approved by WMO (release in May 2016)