GRIB-API definition
| name | surface Surface air relative humidity | Abbreviation | rh2r | Unit | % | paramId: | TBD |
UERRA details
| Definition | The ratio of the partial pressure of water vapour to the equilibrium vapour pressure of water at the same temperature 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. |
WMO GRIB2 definition
| Parameter | ||
|---|---|---|
| Discipline | 0 | meteorological products |
| Parameter Category | 1 | moisture |
| Parameter Number | 1 | relative humidity |
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