GRIB-API ecCodes definition
| Name: | Significant height of combined wind waves and swell | Abbreviation: | swh | Unit: | m | paramId: | 140229 |
UERRA Other 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 |
| Missing values should be encoded as bitmap. |
WMO GRIB2 definition
| Parameter | ||
|---|---|---|
| Discipline | 10 | oceanographic products |
| Parameter category | 0 | waves |
| Parameter number | 3 | Significant height of combined wind waves and swell |
...
| Level | |||
|---|---|---|---|
| Type of first fixed surface | 1 | ground or water surface | |
| Scale factor of first fixed surface | all bits to 1 | missing | |
| Scaled value of first fixed surface | all bits to 1 | missing | |
| 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 | |
...