ecCodes definition
Name: | Significant height of combined wind waves and swell | Abbreviation: | swh | Unit: | m | paramId: | 140229 |
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 |