Eddies and coherent structures within the planetary boundary layer operate across well-defined temporal and spatial scales, ranging from high-frequency small-scale turbulence to large-scale diurnal and convective motions.
The retrieved papers provide extensive empirical and numerical evidence showing that eddies and turbulent structures in the planetary boundary layer exhibit distinct temporal scales (e.g., high-frequency small-scale fluctuations vs. low-frequency large-scale or diurnal motions). Papers 0, 1, 2, and 10 explicitly discuss these scale separations and temporal characteristics.