![]() ![]() ![]() The purpose of this chapter is to review a substantial fraction of the progress in understanding that has been documented in the recent literature of this subject, and to highlight those areas that seem ripe for further advance. ![]() Through careful analysis of the mechanisms involved in such interactions, it has proven possible to learn a great deal concerning the planetary interior that might otherwise have remained hidden from view. Not only are processes within each of these fundamental divisions of the planet involved in determining its rotational state, but the timescales on which measurable interactions occur extend from milliseconds to hundreds of millions and even billions of years. The study of the Earth's rotation occupies an especially important position in the geophysical literature, a consequence of the fact that it is influenced by such a broad range of processes, involving not only the solid Earth but also its overlying atmosphere and oceans as well as the Earth's core, both the liquid outer core and the solid inner core. ![]()
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