Fig. 4

Kinetic energy of horizontal wind per unit mass per unit wavenumber for T159L120 run. a Dependency on the damping time of horizontal diffusion at 70 km. b Dependency on the height for the case with 0.01 Earth days for the damping time of horizontal diffusion. Gradient of n^−5/3 and n⁻³ are shown by solid lines. They are temporally averaged over the last 1 Earth year (360 datasets of daily data)