GRIB-API definition
UERRA details
| Definition | Temperature of a soil level (or layer for MetOffice). |
| Validity | instantaneous |
| Comment |
Sea points should be set as missing values (encoded as bitmap). Soil levels/layers must always start from 1 (0 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 | 18 | soil temperature |
Definition for soil levels 1...X:
| Level | ||
|---|---|---|
| Type of first fixed surface | ||
| 151 | soil |
| level** | ||
| Scale factor of first fixed surface | 0 | |
| Scaled value of first fixed surface |
| 1/2/3/ |
| .../X | n for the nth soil level | |
| Type of second fixed surface | all bits to 1 | missing |
| Scale factor of second fixed surface | all bits to 1 | missing |
| Scaled value of second fixed surface | all bits to 1 | missing |
Definition for soil layers 1...X:
| Level | ||
|---|---|---|
| Type of first fixed surface | 151 | soil level** |
| Scale factor of first fixed surface | 0 | |
| Scaled value of first fixed surface | 0/1/2/3/.../X-1 | n-1 for the nth soil layer |
| Type of second fixed surface | 151 | soil level* |
| Scale factor of second fixed surface | 0 | |
| Scaled value of second fixed surface | 1/2/3/.../X | n for the nth soil layer |
**newly approved level type (WMO release in May 2016)