Numerical solutions of rotational normal modes of a triaxial two-layered anelastic Earth
Numerical solutions of rotational normal modes of a triaxial two-layered anelastic Earth
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三轴两层滞弹性地球旋转简正模态的数值解
DOI:
10.1016/j.geog.2019.03.001
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发表时间:
2019-03
影响因子:
2.4
通讯作者:
Wenying Zhang
中科院分区:
文献类型:
--
作者:
Wenbin Shen;Zhuo Yang;Zhiliang Guo;Wenying Zhang
The Earth's rotational normal modes depend on Earth model used, including the layer structures, principal inertia moments of different layers and the compliances. This study focuses on providing numerical solution of the rotational normal modes of a triaxial two-layered anelastic Earth model without external forces but with considering the complex forms of compliances and the electromagnetic coupling between the core and mantle. Based on the present knowledge of the Chandler wobble (CW) and Free Core Nutation (FCN), we provide a set of complete compliances which could be used for reference in further investigations. There are eight rotational normal mode solutions, four of which might exist in nature. However, in reality only two of these four solutions correspond to the present motion status of the prograde CW and the retrograde FCN. On one hand, our numerical calculations show that the periods and quality factors (Qs) of CW and FCN are respectively 434.90 and 429.86 mean solar days (d) and 76.56 and 23988.47 under frequency-dependent assumption, and the triaxiality prolongs CW about 0.01 d and has hardly effect on FCN. On the other hand, we analyze the sensibility of compliances and electromagnetic coupling parameter on the periods and Qs of CW and FCN and find the sensitive parameters with respect to them.
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DOI:
10.1007/978-94-010-9568-6_27
发表时间:
1980
期刊:
Comparative Biochemistry and Physiology B
影响因子:
--
作者:
T. Sasao;S. Okubo;M. Saito
通讯作者:
T. Sasao;S. Okubo;M. Saito
影响因子:
3.9
作者:
Mathews, PM;Herring, TA;Buffett, BA
通讯作者:
Buffett, BA
影响因子:
--
作者:
P. Defraigne;V. Dehant;J. Hinderer
通讯作者:
P. Defraigne;V. Dehant;J. Hinderer
影响因子:
1.6
作者:
Ana GonzaÂlez;J. Getino
通讯作者:
Ana GonzaÂlez;J. Getino
影响因子:
2.3
作者:
T. Hoolst;V. Dehant
通讯作者:
T. Hoolst;V. Dehant