Ratio of the vertical flux of momentum computed with the full Coriolis acceleration (left panel) and assuming the TAR (right panel) with its value computed in the non-rotating case (with Ω ≡ 0) as a function of the colatitude (θ) for a fixed value of the Froude wave number (F_r = ω/N = 0.25) and different values of the wave Rossby number (R_o = {0.1,0.5,1,2,100}). In the NT case, we fixed α = π/4.