sea_surface_wind_wave_period
https://w3id.org/hacid/data/cs/variables/cf/sea_surface_wind_wave_period <https://w3id.org/hacid/onto/data/Variable>
A period is an interval of time, or the time-period of an oscillation. Wind waves are waves on the ocean surface. Wind is defined as a two-dimensional (horizontal) air velocity vector, with no vertical component. (Vertical motion in the atmosphere has the standard name upward_air_velocity.)
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sea_surface_wind_wave_period