摘要
本文试图解释内核与其外部差异旋转的原因．通过对潮汐摩擦力、嘲汐耗散能与地球长周期减慢失去动能的分析和比较，我们认为地球长周期自转减慢与地核转速的加快是同一动力学背景下的两个方面，即：由于外核液态层的存在，部分地阻止潮汐作用进入到内核区，故潮汐摩擦致使地核外部的减慢，相对地，内核转速表现为加快．进一步地。
The Phenomenon that the rotation of the Earth's inner core is faster than the rotation of its outer part is sensativally discovered by seismological method in 1996.In this paper,we try to explain the phenomenon's reason. By analysing and comparing between tidal friction energy and tidal dissipassion, We thought the Earth's slowing down in Long_priod is caused by tidal friction、Due to liquid,the outer core permits mostly tidal function into the inner_core. Accordingly,the innrer core rotation resolutionly shows faster than its outer part's. We advocate a model of differential rotation :the lithosphere's rotation <main mantle's <the inner core's.
