Atmospheric excitation of polar motion |
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| Authors: | Wei Chen Xiaowei Dong |
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| Affiliation: | 1. School of Geodesy and Geomatics , Wuhan University , Wuhan , China;2. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing , Wuhan University , Wuhan , China;3. School of Geodesy and Geomatics , Wuhan University , Wuhan , China |
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| Abstract: | The polar motion excited by the fluctuation of global atmospheric angular momentum (AAM) is investigated. Based on the global AAM data, numerical results demonstrate that the fluctuation of AAM can excite the seasonal wobbles (e.g., the 18-month wobble) and the Chandler wobble, which agree well with previous studies. In addition, by filtering the dominant low frequency components, some distinct polar wobbles corresponding to some great diurnal and semi-diurnal atmospheric tides are found. |
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| Keywords: | polar motion atmospheric excitation 18-month wobble Chandler wobble atmospheric tides |
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