Earth's free core nutation determined using C032 superconducting gravimeter at station Wuhan/China

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Earth's free core nutation determined using C032 superconducting gravimeter at station Wuhan/China

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Earth's free core nutation determined using C032 superconducting gravimeter at station Wuhan/China (Citations: 1)


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The long series tidal gravity observations from 1997 to 2002 recorded with C032 superconducting gravimeter (SG) at station Wuhan/China are used in order to study the Earth's geodynamics. The tidal gravity parameters are determined precisely using Eterna software package after careful data pre-processing. The Earth's free core nutation (FCN) resonant parameters (eigenperiods, quality factors and resonant strengths) are determined accurately. The results show the determined eigenperiod to be 431.0 sidereal days with an accuracy of ±1.81%, the quality factor is a negative one as of −7002, and the resonance strength can be explained by the elastic property of the Earth's mantle. The discrepancy of the eigenperiods when using various ocean models can amount to ±1.8%. The 30 sidereal days difference between the determined eigenperiod in this paper and the one in theoretical computation given by Wahr and Bergen can be explained by the real dynamic ellipticity of the Earth's liquid core, i.e., it is about 5% larger than the one under the hydrostatic equilibrium assumption.

Journal: Journal of Geodynamics - J GEODYNAMICS , vol. 38, no. 3, pp. 451-460, 2004

DOI: 10.1016/j.jog.2004.07.007

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References (11)

Modeling of nutation and precession: New nutation series for nonrigid Earth and insights into the Earth''''s interior (Citations: 71)

P. M. Mathews, T. A. Herring, B. Bu Ett

Published in 2001.
Network of superconducting gravimeters benefits a number of disciplines (Citations: 89)

D. Crossley, J. Hinderer, G. Casula, O. Francis, H.-T. Hsu, Y. Imanishi, G. Jentzsch, J. Kääriänen, J. Merriam, B. Meurers, J. Neumeyer, B. Richterhttp://academic.research.microsoft.com/io.ashx?type=5&id=42057546&selfId1=0&selfId2=0&maxNumber=12&query=

Journal: Eos, Transactions American Geophysical Union , vol. 80, no. 11, pp. 121-121, 1999
Tides for a convective Earth (Citations: 78)

V. Dehant, P. Defraigne, J. M. Wahr

Journal: Journal of Geophysical Research , vol. 104, no. B1, pp. 1035-1058, 1999
Comparison of different barometric pressure reductions for gravity data and resulting consequences (Citations: 24)

C Kroner, G Jentzsch

Journal: Physics of The Earth and Planetary Interiors - PHYS EARTH PLANET INTERIORS , vol. 115, no. 3, pp. 205-218, 1999
Comparison of recent ocean tide models using ground-based tidal gravity measurements (Citations: 21)

Paul Melchior, Olivier Francis

Journal: Marine Geodesy - MAR GEODESY , vol. 19, no. 4, pp. 291-330, 1996

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Citations (1)

Determination of the Earth’s free core nutation parameters by using tidal gravity data

Ming-bo Liu, He-ping Sun, Jian-qiao Xu, Jiang-cun Zhou

Journal: Acta Seismologica Sinica , vol. 20, no. 6, pp. 708-711, 2007


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Keywords (5)

References (11)

Modeling of nutation and precession: New nutation series for nonrigid Earth and insights into the Earth''''s interior (Citations: 71)

Network of superconducting gravimeters benefits a number of disciplines (Citations: 89)

Tides for a convective Earth (Citations: 78)

Comparison of different barometric pressure reductions for gravity data and resulting consequences (Citations: 24)

Comparison of recent ocean tide models using ground-based tidal gravity measurements (Citations: 21)

Citations (1)

Determination of the Earth’s free core nutation parameters by using tidal gravity data