Analysis of Earth Tide as Whole Earth Forced Oscillation and Its Computation: Report
A study of body tide of the earth is reported. The equation of motion for body tide is stated and is converted into a set of first-order dierential equations. Love numbers, which are the ratios - a ratio between the tide-raising gravity potential due to the moon and the sun and the gravity potential due to the tidal deformation itself, and two other associated ratios are acquired. The procedures to acquire Love numbers and to calculate the gravity tide are described. Direct formulae for tidal perturbations in other geophysical observables are presented. Finally, recent studies of tide are summarized, and on-going Korean research is described.