PSD in the wavenumber domain for the longitudinal strips (L3, L4) and transverse strips (T3, T4) plotted for two ensemble averages of time before the collision of the material with the upper chromosphere boundary, representing a more RT instability turbulence (top), and after this collision led to more fully developed turbulence (bottom). All the PSDs are shifted on the y-axis for clarity. The dashed colored lines show fits of scalings done for a particular field in one direction between 0.32 and 3.2 Mm⁻¹, as marked by the vertical dashed lines in all panels. There is a secondary steeper scaling of −3.5 at larger wavenumbers, as marked by the dotted black lines.