Modelling the pole tide and its effect on the earth's rotation

Details Modelling the pole tide and its effect on the earth's rotation Modelling the pole tide and its effect on the earth's rotation

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986geoj...84..121c&link_type=abstract

Geophysical Journal (ISSN 0016-8009), vol. 84, Jan. 1986, p. 121-137.

Physics

22

Earth Rotation, Planetary Waves, Polar Wandering (Geology), Tides, Angular Momentum, Differential Equations, Laplace Equation, North Sea

Scientific paper

The pole tide is the response of the ocean to incremental centrifugal forces associated with the Chandler wobble. The tide has a potentially important effect on the period and damping of the wobble, but it is at present not well constrained by observations. Here, both analytical and numerical models for the pole tide are constructed. The analytical models consider the tide first in a global ocean and then in an enclosed basin on a beta-plane. The results are found to approach equilibrium linearly with decreasing frequency and inversely with increasing basin depth. The numerical models solve Laplace's tidal equations over the world's oceans using realistic continental boundaries and bottom topography. The results indicate that the effects of non-equilibrium portion of the deep ocean tide on the Chandler wobble period and damping are negligible.

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