Temporal variations in free core nutation period |
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| Authors: | Jianqiao Xu Heping Sun Key Laboratory of Dynamic Geodesy |
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| Institution: | Jianqiao Xu , Heping Sun Key Laboratory of Dynamic Geodesy,Institute of Geodesy , Geophysics,Chinese Academy of Sciences,Wuhan 430077,China |
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| Abstract: | Based on the nearly diurnal resonance in the tidal gravity observations,the temporal variations in period of the Earth's free core nutation (FCN) are investigated by using the tidal gravity observations of 18-year duration recorded continu-ously with a superconducting gravimeter (SG) at Brussels. The effects of the global oceanic tide loading and local barometric pressure on the SG observations have been removed by using eleven high-precision global digital models of oceanic tides and barometric pressure me... |
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| Keywords: | nearly diurnal resonance superconducting gravimeter tidal gravity observations period of the free core nutation temporal variation |
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