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GRIB-API definition
:specific_| 2 metre relative humidity | Abbreviation |
:qkg kg-1
UERRA details
mass of water vapor per unit mass of air, including the water vapor | ratio of the partial pressure of water vapour to the equilibrium vapour pressure of water at the same temperature near the surface. |
| Validity |
Instantaneousinstantaneous |
| 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.
WMO GRIB2 definition
= Meteorological | meteorological products |
| Parameter Category |
= Moisture= 0Specific | Level |
|---|
| Type of first fixed surface |
= Specified | specified height level above ground (m) |
| Scale factor of first fixed surface |
= | or 1*** | (m) or (dm***) |
| Scaled value of first fixed surface |
= 2 metres (might vary from one centre to another)| or 15*** | 2 / 1.5 m |
| Type of second fixed surface |
= Missing missing
|
| Scale factor of second fixed surface |
= Missing| missing |
| Scaled value of second fixed surface |
= Missing*** option valid for MetOffice