X and Y equatorial components of the atmospheric relative angular momentum (Δh_a, blue) and of the polar motion it induces on the solid body (m_a, orange). The angular momentum is normalized by |CΩ| which is the transfer function for high frequencies. Bright lines show the numerical time series for the Δha, with m_a computed through a Discrete Fourier Transform. Darker lines show the quasi-periodic approximation for Δh_a with only the first three components of Table 2, with m_a computed analytically. The time axis is in Earth days.