Theoretical amplitudes and phases of the periodic polar motion terms caused by ocean tides

Abstract

Dynamic ocean tides cause a small wobble of the Earth's axis of rotation. Each tidal component produces an elliptical wobble. Ellipse parameters and cartesian amplitudes plus phases are tabulated for the ten tidal components M 2 , S 2 , N 2 , K 1 , O 1 , P 1 , Mf, Mf', Mm, Ssa. The wobbles produced by the largest tidal components, M 2 , K 1 and O 1 reach a semi-major axis of 0.55, 0.41 and 0.34 milliarcsec. (mas), respectively. The amplitude of the superposition of the wobbles due to the semidiurnal and diurnal tides is 1 mas