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首页> 外文期刊>Journal of geodynamics >On the physical meaning of the zonal components of the geopotential
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On the physical meaning of the zonal components of the geopotential

机译：关于地势带状成分的物理意义

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摘要

The MacCullagh equation is of key importance in the study of the Earth. It connects the geometrical and the physical properties of the Earth through the geodynamical shape factor J_2. This second zonal geopotential coefficient is closely related to the flattening and to the angular spin velocity of the Earth as well as to its equatorial (A) and polar (C) moments of inertia. Through these moments of inertia the gravitational potential Ⅴ is connected to the mass density distribution within the Earth. The main target of the present study is to obtain a generalized form of the MacCullagh equation for even orders n ≥ 2 by including the higher order zonal coefficients J_n connected with the higher (n ≥ 2) degree moments of inertia C_n and A_n. The higher the degree n, the higher is the weight of the near-surface (i.e. shallow) mass density distribution in J_n. The second part of this contribution deals with the temporal variations of J_n, dJ_n/dt for n ≥ 2.
机译：MacCullagh方程在地球研究中至关重要。它通过地球动力学形状因子J_2连接地球的几何和物理属性。第二个纬向地势系数与地球的平坦度和角自旋速度以及其赤道（A）和极地（C）惯性矩密切相关。通过这些惯性矩，重力势Ⅴ与地球内部的质量密度分布有关。本研究的主要目标是通过包含与较高惯性矩C_n和A_n（n≥2）相关的高阶区域系数J_n，来获得偶数阶n≥2的MacCullagh方程的广义形式。程度n越高，J_n中近表面（即浅层）质量密度分布的权重就越高。此贡献的第二部分处理n≥2时的J_n，dJ_n / dt的时间变化。

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