Fig. 2
Time-averaged main-diagonal components of α (a–c) together with αK, αK + αM (d) and the parity P(αrr) (see Eq. (8)) (e) over latitude 90°−θ in the northern hemisphere and for three different radii: r = 0.98 R (black), r = 0.84 R (red), r = 0.72 R (blue). Solid and dashed lines in d: αK and αK + αM, respectively. Values in a–d are normalized by 
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