Influence of elastic deformations on the inner core wobble

Geophysical Journal International

Volumn 178, Issue 1, 2009, Pages 57-64

  Dumberry, Mathieu ^a  

^a UNIVERSITY OF ALBERTA   (Canada)

Author keywords

Core; Earth rotation variations; Elasticity and anelasticity; Outer core and inner core

Indexed keywords

ANGULAR MOMENTUM; DEFORMATION; EARTH ROTATION; ELASTICITY; ESTIMATION METHOD; INNER CORE; MANTLE STRUCTURE; MODELING; OUTER CORE;

EID: 67650169368     PISSN: 0956540X     EISSN: 1365246X     Source Type: Journal    
DOI: 10.1111/j.1365-246X.2009.04140.x     Document Type: Article

References (28)

1. Buffett, B.A., 1992. Constraints on magnetic energy and mantle conductivity from the forced nutations of the Earth, J. geophys. Res., 97, 19581-19597.
2. Buffett, B.A., 1997. Geodynamic estimates of the viscosity of the Earth's inner core, Nature, 388, 571-573.
3. Buffett, B.A., Mathews, P.M., Herring, T.A. & Shapiro, I.I., 1993. Forced nutations of the Earth: Contributions from the effects of ellipticity and rotation on the elastic deformations, J. geophys. Res., 98, 21659-21676.
4. Buffett, B.A., Mathews, P.M. & Herring, T.A., 2002. Modeling of nutation-precession: Effects of electromagnetic coupling, J. geophys. Res., 107.
5. Busse, F.H., 1970. The dynamical coupling between inner core and mantle of the Earth and the 24-year libration of the pole, in Earthquake Displacement Fields and the Rotation of the Earth, Vol. 20, pp. 88-98, eds Mansinha, D., Smylie, D.E. & Beck, A.E., Astrophysics and Space Science Library, D. Reidel Publishing company, Dordrecht, Holland.
6. de Vries, D. & Wahr, J.M., 1991. The effects of the solid inner core and nonhydrostatic structure on the Earth's forced nutations and Earth tides, J. geophys. Res., 96, 8275-8293.
7. Dehant, V., Hinderer, J., Legros, H. & Lefftz, M., 1993. Analytical approach to the computation of the Earth, the outer core and inner core rotational motions, Phys. Earth planet. Inter., 76, 259-282.
8. Deleplace, B. & Cardin, P., 2006. Viscomagnetic torque at the core mantle boundary, Geophys. J. Int., 167, 557-566.
9. Dumberry, M., 2007. Geodynamic constraints on the steady and time-dependent inner core axial rotation, Geophys. J. Int., 170, 886-895.
10. Dumberry, M., 2008. Decadal variations in gravity caused by a tilt of the inner core, Geophys. J. Int., 172, 921-933.
11. Dziewonski, A.M. & Anderson, D.L., 1981. Preliminary reference Earth model, Phys. Earth planet. Inter., 25, 297-356.
12. Gross, R.S., 2007. Earth rotation variations-long period, in Treatise on Geophysics, Vol. 3, pp. 239-294, eds Schubert, G. & Herring, T., Elsevier, Amsterdam.
13. Guo, J.Y., Greiner-Mai, H. & Ballani, L., 2005. A spectral search for the inner core wobble in the Earth's polar motion, J. geophys. Res., 110.
14. Gwinn, C.R., Herring, T.A. & Shapiro, I.I., 1986. Geodesy by radiointerferometry: Studies of the forced nutations of the Earth, 2: interpretation, J. geophys. Res., 91, 4755-4765.
15. Herring, T.A., Gwinn, C.R. & Shapiro, I.I., 1986. Geodesy by radiointerferometry: Studies of the forced nutations of the Earth, 1: data analysis, J. geophys. Res., 91, 4745-4754.
16. Kakuta, C., Okamoto, I. & Sasao, T., 1975. Is the nutation of the solid inner core responsible for the 24-year libration of the pole?, Publ. astr. Soc. Jpn., 27, 357-365.
17. Koot, L., Rivoldini, A., de Viron, O. & Dehant, V., 2008. Estimation of Earth interior parameters from a Bayesian inversion of VLBI nutation time series, J. geophys. Res., 113, B08414.
18. Lambeck, K., 1980. The Earth's Variable Rotation: Geophysical Causes and Consequences, Cambridge University Press, Cambridge.
19. Mathews, P.M. & Guo, J., 2005. Viscoelectromagnetic coupling in precessio-nutation theory, J. geophys. Res., 110, B02402.
20. Mathews, P.M., Buffett, B.A., Herring, T.A. & Shapiro, I.I., 1991a. Forced nutations of the Earth: Influence of inner core dynamics, 1: theory, J. geophys. Res., 96, 8219-8242.
21. Mathews, P.M., Buffett, B.A., Herring, T.A. & Shapiro, I.I., 1991b. Forced nutations of the Earth: Influence of inner core dynamics, 2: numerical results, J. geophys. Res., 96, 8243-8257.
22. Mathews, P.M., Herring, T.A. & Buffett, B.A., 2002. Modeling of nutations and precession: New nutation series for nonrigid Earth and insights into the Earth's interior, J. geophys. Res., 107.
23. Rochester, M.G. & Crossley, D.J., 2009. Earth's long period wobble modes: A Lagrangian description, Geophys. J. Int., 176, 40-62.
24. Rogister, Y., 2001. On the diurnal and neary diurnal free modes of the Earth, Geophys. J. Int., 144, 459-470.
25. Saito, M., 1974. Some problems of static deformations of the Earth, J. Phys. Earth, 22, 123-140.
26. Smith, M.L., 1977. Wobble and nutation of the Earth, Geophys. J. R. astr. Soc., 50, 103-140.
27. Smith, M.L. & Dahlen, F.A., 1981. The period and Q of the Chandler wobble, Geophys. J. R. astr. Soc., 64, 223-281.
28. Xu, S. & Szeto, A.M.K., 1998. The coupled rotation of the inner core, Geophys. J. Int., 133, 279-297.