Concept
sea_surface_wave_from_direction_at_variance_spectral_density_maximum
| URI | http://vocab.nerc.ac.uk/collection/P07/current/I8P5MQ0F/ | ||
|---|---|---|---|
| Within Vocab | Climate and Forecast Standard Names | ||
| Alternative Labels | |||
| Definition | The quantity with standard name sea_surface_wave_from_direction_at_variance_spectral_density_maximum is the direction from which the most energetic waves are coming. The spectral peak is the most energetic wave in the total wave spectrum. 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 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. | ||
| Date | 2017-03-27T15:08:34 | ||
| Identifier | SDN:P07::I8P5MQ0F | ||
| Note | accepted | ||
| Has Current Version | 1 | ||
| version | 1 | ||
| Same As | MMI | http://mmisw.org/ont/cf/parameter/sea_surface_wave_from_direction_at_variance_spectral_density_maximum | Mapping: 287386 |
| CF | http://vocab.nerc.ac.uk/standard_name/sea_surface_wave_from_direction_at_variance_spectral_density_maximum/ | Mapping: 369965 | |
| Broader | P02:GWDR |
Wave direction | Mapping: 1534558 |
| Related | P06:UAAA |
Degrees | Mapping: 886229 |
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