a) Root mean squared dB, dB_⊥, and dB_∥ (black, maroon, red); magnitude of the mean magnetic field, B₀, orange. b) Spherically confined fluctuations, dB, dB_⊥, and dB_∥, (black, maroon, red) where all fluctuations maintain a constant magnitude, |B_sph|. The RMS residual fluctuations between the total field and spherically polarized field, dB_C, are shown in dark blue. The dashed red line shows the wave amplitude from conservation of wave action with no dissipation. The blue line shows the best fit to dB^sph. c) Normalized amplitudes, dB_⊥^sph/B₀, dB_∥^sph/B₀, and $d{B}_C^{\mathit{sph}}/B_0$. Best fit lines to dB_⊥^sph/B₀ and dB_∥^sph/B₀ are shown as well as the scaling expected for conservation of wave action.