Transport properties of thermal energy and angular momentum by the north-south ζ_z-symmetric columnar convective modes for m = 16. (a) Correlation between radial velocity velocity and temperature perturbation ⟨v_rT₁⟩, (b) Reynolds stress between radial and longitudinal velocities ⟨v_rv_ϕ⟩, and (c) Reynolds stress between latitudinal and longitudinal velocities ⟨v_θv_ϕ⟩. The background is weakly superadiabatic (δ = 2 × 10¹⁶), rotation is uniform, and moderate diffusivities are used (ν = κ = 10¹² cm² s⁻¹). The eigenfunctions are normalized such that the maximum radial velocity is 10 m s⁻¹ at the equator.