GRIB-API definition
| Name: | Spectral mean direction over all frequencies and direction of the two-dimensional wave spectrum | Abbreviation: | mwd | Unit: | degree true | paramId: | 140230 |
UERRA details
| Definition | Better known as the Significant Wave Height. The significant wave height is defined as 4 times the square root of the integral over all directions and all frequencies of the two-dimensional wave spectrum. The integration is performed over all frequencies up to infinity. |
| Validity | instantaneous |
| Comment |
WMO GRIB2 definition
| Parameter | ||
|---|---|---|
| Discipline | 10 | oceanographic products |
| Parameter category | 0 | waves |
| Parameter number | 14 | Direction of combined wind waves and swell |
| Level | ||
|---|---|---|
| Type of first fixed surface | 101 | Mean sea level |
| Scale factor of first fixed surface | 0 | |
| Scaled value of first fixed surface | 0 | |
| 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 |