High-latitude inertial mode with north-south antisymmetric ζ_z. (a) Power spectrum of the north-south symmetric component of v_θ at the base of the convection zone r = 0.71R_⊙ at m = 1 as a function of latitude. The high-latitude mode’s power exists at a frequency of about −48 nHz, whereas the power of the n = 0 equatorial Rossby mode can be seen at ω/2π ≈ −395 nHz. (b) Same as Fig. C.1b, but for the mode with north-south antisymmetric ζ_z.