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CF Standard Names (copied into data request to facilitate validation, particularly validation of consistency of definition in the CF standard with usage in the data request).
| Attribute | Value |
|---|---|
| canonical_units | degree |
| description | The quantity with standard name sea_surface_swell_wave_from_direction_at_variance_spectral_density_maximum is the direction from which the most energetic waves are coming in the swell wave component of a sea. Swell waves are waves on the ocean surface and are the low frequency portion of a bimodal wave frequency spectrum. The spectral peak is the most energetic wave in the wave spectrum partition. The phrase "from_direction" is used in the construction X_from_direction and indicates the direction from which the velocity vector of X is coming. The direction is a bearing in the usual geographical sense, measured positive clockwise from due north. The swell wave directional spectrum can be written as a five dimensional function S(t, x, y, f, theta) where t is time, x and y are horizontal coordinates (such as longitude and latitude), f is frequency and theta is direction. S has the standard name sea_surface_wave_directional_variance_spectral_density. S can be integrated over direction to give S1= integral(S dtheta) and this quantity has the standard name sea_surface_wave_variance_spectral_density. |
| name | sea_surface_swell_wave_from_direction_at_variance_spectral_density_maximum |
| uid | 3ba81297-8ca2-11ef-944e-41a8eb05f654 |