Estimation of the contribution of geophysical perturbations to the Earth pole oscillatory process at the precession frequency of the lunar orbit

Abstract

Abstract The contribution of the main geophysical perturbations (atmospheric and oceanic) to the oscillatory process in phase with the precession of the lunar orbit is investigated. The solutions for the differential equations of Earth pole motion are obtained, taking into account the atmospheric angular moment and the oceanic angular momentum, and the combination harmonics associated with the oscillatory process under consideration are identified. It is shown that the harmonics found are partially caused by fluctuations in the mobile media of the atmosphere and ocean.