Dissipation spectra for m = 2, Pr = Sc = 1, and E = 10⁻⁶ (top), E = 10⁻⁷ (middle), and E = 10⁻⁸ (bottom) with a spatial resolution (N_r, N_ℓ) = (300, 301). The total dissipation is represented by black crosses, and its viscous, thermal, and molecular contributions are represented by green points, red stars, and blue plus signs, respectively. The magenta dashed line indicates the viscous (total) dissipation in the case of a purely convective interior .