Polar motion of the triaxial nonrigid Earth and atmospheric excitation |
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Authors: | Wei Chen Wenbin Shen |
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Institution: | (1) Research Group Advanced Geodesy, Institute of Geodesy and Geophysics, Vienna University of Technology, Gusshausstrasse 27–29, 1040 Vienna, Austria |
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Abstract: | The present study aims to extend the traditional rotation theory of the rotational-symmetric Earth to the triaxial Earth.
We re-formulate the Liouville equations and their general solutions for the triaxial nonrigid Earth and find that the traditional
theory introduces some theoretical errors in modeling the excitation functions. Furthermore, we apply that theory to the atmospheric
excitation and find that theoretical errors should not be neglected given the present measurement accuracy. Thus we conclude
that the traditional theory of the rotation of the rotational-symmetric Earth should be revised and upgraded to include the
effects of the Earth’s triaxiality. |
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Keywords: | Earth rotation triaxiality of the Earth atmospheric excitation |
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