Global Sea Level Changes Inferred from Polar Motion
Mass motions in the ocean excite variations of polar motion and the length of day (LOD). Since sea level change which indicates these mass motions is observed only at the coast lines, it is difficult to construct the corresponding excitation function. Its evaluation demands the knowledge of sea level changes equally distributed over the whole ocean. This induced us to consider the influence of global sea level changes on the rotation of the Earth as an inverse problem. The inverse solution leads to a system of integral equations, the solution of which is ambiguous. Therefore the result can tell us only something on global or regional properties of sea level changes.
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