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to-be-defined as 2m relative or specific humidity WMO like definition doesn't seem to exist yet.
"Surface air specific humidity" could look like below
name: | specific_humidity | Abbreviation: | q | Unit: | kg kg-1 |
Definition | The mass of water vapor per unit mass of air, including the water vapor near the surface. |
Validity | Instantaneous |
Comment | Please note that the specific height level above ground might vary from one Centre to another. The scaled value of first fixed surface given below is the one in usage at ECMWF. |
Parameter |
---|
Discipline | = 0 | Meteorological products |
Parameter Category | = 1 | Moisture |
Parameter Number | = 0
| Specific humidity
|
Level |
---|
Type of first fixed surface | = 103 | Specified height level above ground m |
Scale factor of first fixed surface | = 0 | |
Scaled value of first fixed surface | = 2 | 2 metres (might vary from one centre to another) |
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 |