Concept
Sea surface secondary swell wave directional spread
| URI | http://vocab.nerc.ac.uk/standard_name/sea_surface_secondary_swell_wave_directional_spread/ | ||
|---|---|---|---|
| Within Vocab | Climate and Forecast Standard Names | ||
| Definition | The quantity with standard name sea_surface_secondary_swell_wave_directional_spread is the directional width of the secondary 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 secondary swell wave is the second most energetic wave in the low frequency portion of a bimodal wave frequency spectrum. Directional spread is the (one-sided) directional width within a given sub-domain of the wave directional spectrum, 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. For a given mean wave (beam) direction the quantity approximates half the root mean square width about the beam axis, as derived either directly from circular moments or via the Fourier components of the wave directional spectrum. | ||
| Date | None | ||
| Note | accepted | ||
| modified | 2018-08-06 12:15:46.0 | ||
| Exact Match | http://mmisw.org/ont/cf/parameter/sea_surface_secondary_swell_wave_directional_spread | ||
| http://vocab.nerc.ac.uk/standard_name/sea_surface_secondary_swell_wave_directional_spread/ | |||
P07:4XZV20IR |
sea_surface_secondary_swell_wave_directional_spread | ||
| Related | P06:UAAA |
Degrees | |
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