GRIB-API definition
| Name | Soil depth | Abbreviation | sod | Unit | m | paramId: | 260367 |
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 | 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 |
**newly approved by WMO (release in May 2016)
4 Comments
Richard Mladek
"The soil level represents a model level for which the depth is not constant across the model domain. The depth in metres of the level is provided by another GRIB message with the parameter 'soil depth' with discipline 2, category 3 and parameter number 27."
Related links:
Sebastien Villaume
Richard,
why do you define the depth of layer instead of simply defining the depth of a soil level?
It seems strange to me to define the depth of something that has a thickness
it should be:
Richard Mladek
Sounds good. Please go for it
I am going to change this page accordingly now.
Sebastien Villaume
great. But since this parameter has a valid level I would not have it in your "surface level parameters" but in a separate "soil level parameters" It will actually only be soil depth and soil temperature in that specific category.
edit:
and volumetric soil water