论文标题
地月距离的共振潮汐演变
The Resonant Tidal Evolution of the Earth-Moon Distance
论文作者
论文摘要
由于地球系统中的潮汐相互作用,地球的旋转速度降低了,月球逐渐流离下来。现在对月球的经济衰退精确地测量了五十多年前,这种简单的潮汐模型已在时间上推断出来,导致月球时代与地质和地球化学证据不相容。为了逃避这个问题,考虑到海洋潮汐耗散,已经提出了更多精心设计的模型。但是,这些模型同时不符合估计的月球年龄和目前的月球衰退率。在这里,我们提出了一个物理模型,该模型可以调解这两个约束,并产生潮汐历史的独特解决方案。该解决方案非常适合Earth-Moon系统历史的可用地质代理,并巩固了环地层学方法。所得的进化涉及海洋耗散中的多个共振,这与月球轨道距离的显着和快速变化有关,地球的长度以及地球的倾斜度有关。
Due to tidal interactions in the Earth-Moon system, the spin of the Earth slows down and the Moon drifts away. This recession of the Moon is now measured with great precision, but it has been realized, more than fifty years ago, that simple tidal models extrapolated back in time lead to an age of the Moon that is by far incompatible with the geochronological and geochemical evidence. In order to evade this problem, more elaborate models have been proposed, taking into account the oceanic tidal dissipation. However, these models did not fit both the estimated lunar age and the present rate of lunar recession simultaneously. Here we present a physical model that reconciles these two constraints and yields a unique solution of the tidal history. This solution fits well the available geological proxies for the history of the Earth-Moon system and consolidates the cyclostratigraphic method. The resulting evolution involves multiple crossings of resonances in the oceanic dissipation that are associated with significant and rapid variations in the lunar orbital distance, the Earth's length of the day, and the Earth's obliquity.