ecCodes definition
| Name: | Soil temperature | Abbreviation: | st | Unit: | K | paramId: | 228139 |
TIGGE details
| Definition | The average soil temperature on the top 20cm of the soil layer. |
| Validity | Instantaneous |
| Comment |
WMO GRIB2 definition
| Parameter | ||
|---|---|---|
| Discipline | 2 | Land surface products |
| Parameter Category | 0 | Vegetation/biomass |
| Parameter Number | 2 | Soil temperature |
| Level | ||
|---|---|---|
| Type of first fixed surface | 106 | Depth below land surface m |
| Scale factor of first fixed surface | 0 | |
| Scaled value of first fixed surface | 0 | 0 |
| Type of second fixed surface | 106 | Depth below land surface m |
| Scale factor of second fixed surface | 1 | |
| Scaled value of second fixed surface | 2 | 0.2 metre |
Comments
| Author | Contents |
|---|---|
| Jörg Urban | ECMWFs has four soil layers: layer 1 from 0cm to 7cm, layer 2 from 7cm to 28cm, layer 3 from 28cm to 1m and layer 4 from 1m to 2.89m. The parameter soil temperature is then computed: st ( 7 * T_1 + 13 * T_2 )/20, where T_i are the averaged soil temperatures on the i-th level. |