Power spectra of the (incompressible) horizontal motions E_h (black line) and the (incompressible) vertical motions E_z (red line) as a function of the horizontal wavenumber, ﹩{k}_{h}={({k}_{x}^{2}+{k}_{y}^{2})}^{1/2},\;﹩ for a cross section of the fiducial atmosphere ﹩z=5h﹩ averaged over times ﹩t=300-400h/{c}_{{\rm{iso,0}}}.﹩ The black dashed line shows a fiducial Kolmogorov slope of ﹩{k}^{-5/3}.﹩ Time is measured in units of ﹩h/{c}_{{\rm{iso,0}}}﹩ and energy power spectra are in units of ﹩{\rho }_{0}{c}_{{\rm{iso,0}}}^{2}h.﹩