Results from the highest-resolution simulation (﹩{\theta }_{0}=0﹩, N = 16384). Upper panel: plot of the total magnetic field magnitude B²(z) in the subdomain z = 2–4.5 at three different times. Lower panel: temporal evolution of the average B², ﹩{p}_{\parallel }﹩ and ﹩{p}_{\perp }﹩ during the linear stage and saturation.