High-latitude inertial mode with north-south symmetric ζ_z. (a) Power spectrum of the north-south antisymmetric component of latitudinal velocity v_θ at the base of the convection zone r = 0.71R_⊙ for m = 1 as a function of latitude. The power associated with the high-latitude mode is denoted by black arrows at ω/2π ≈ −105 nHz. (b) Extracted eigenfunctions of the m = 1 mode. The lower and upper panels show the eigenfunctions extracted from the simulation and from the linear analysis, respectively.