地球节律的成因

地球节律主要受地球内部能量间歇性的释放所控制。旋转系统有不同于非旋转系统的位能、热能和旋转能的相互转换方式。在重力分异和热对流过程中，地核不仅有巨量热能，而且有巨量的旋转能和放射性蜕变能。这是地球能量释放的内因。天文因素使地球内核周期性地南北振动，使地球轨道、体积，形状、自转速度、公转速度和差异旋转状态周期性地变化。这是地球能量间歇性释放的外因。对作差异旋转的内核而言，万有引力常数Ｇ的变化可以改变太阳辐射量和太阳系体积，影响核幔的角动量交换和地壳地幔容积，造成热幔柱的形成与喷发，控制了核幔边界的能量交换过程。这是天文周期与地质旋回一一对应的原因，也是地球节律产生的根本原因。这使人们可以从天文周期预测地质变动。

THE CAUSE OF THE EARTH'S RHYTHMS

The Earth's rhythm is controlled by the intermittent energy liberation in the Earth. In the Earth's revolution and the Earth's rotation system, the energy conversion among the potential energy, thermal energy and rotational energy is different from that in non revolution and non rotation system. In the Earth's core, there exists not only huge thermal energy, but huge rotation energy and radioactive heat source. They are the internal causes of energy liberation. Astronomical factor makes the Earth's inner core to vibrate periodically, makes the Earth's orbit, the Earth's volume, the Earth's ellipticity, speed of the Earth's revolution and speed of the Earth's rotation to change periodically, it is the external cause of the intermittent energy liberation. As concerns the differential rotation of the Earth's inner core, the fluctuations of gravitational constant G value makes the solar radiative quantity and the solar system's volume to change and to effect the exchange of core mantle angular momentum and volume of crust mantle, and so leads to the formation and eruption of the superplumes, so it controls the energy exchange in CMB. It is the reason for the correspondence of the geological cycles one by one with the astronomical periods and is the basic cause of the Earth's rhythm. According to the astronomical periods, it is probable that the geological changes may be predicted in the future.