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首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Basic Relations for Studying the Influence of Geophysical Processes on the Earth's Rotation: The Angular Momentum Approach
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Basic Relations for Studying the Influence of Geophysical Processes on the Earth's Rotation: The Angular Momentum Approach

机译：研究地球物理过程对地球自转影响的基本关系：角动量法

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摘要

Relations to study the influence of geophysical processes on the temporally varying rotation of the Earth are considered. Liouville's equations of rotational motion are derived for a two-component Earth model (consisting of a solid mantle and a fluid core) and suitably simplified for calculations of the influence of mass redistributions on the Earth's rotational behaviour. Excitation functions, or effective angular momentum functions, describing the influence of mass redistributions on the equations of rotational motion are derived, and their calculation is elucidated by some examples. Relations between temporally varying second degree Stokes coefficients of the gravity field and excitation functions are discussed. Different solutions of the equations of rotational motion are described. The identification of exciting geophysical processes by the kinematics of the inverse calculated excitation function is portrayed.
机译：考虑了研究地球物理过程对地球随时间变化的自转影响的关系。 Liouville的旋转运动方程是针对两部分地球模型（由实心地幔和流体核心组成）推导的，并经过适当简化，以计算质量重新分布对地球旋转行为的影响。得出了描述质量重新分布对旋转运动方程的影响的激励函数或有效角动量函数，并通过一些示例阐明了它们的计算。讨论了重力场随时间变化的二阶斯托克斯系数与激励函数之间的关系。描述了旋转运动方程的不同解。描绘了通过反演计算的激发函数的运动学确定激发的地球物理过程。

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