Effects of non-hydrostatic core-mantle boundary topography and core dynamics on Earth rotation

Geophysical Journal International

Volumn 128, Issue 1, 1997, Pages 18-42

  Wu, Xiaoping ^a   Wahr, John M ^b  

^a CALIFORNIA INSTITUTE OF TECHNOLOGY   (United States)

^b UNIVERSITY OF COLORADO   (United States)

Author keywords

Core mantle boundary; Earth's rotation; Nutation

Indexed keywords

CORE/MANTLE BOUNDARY; NUTATION; PLANETARY ROTATION; TOPOGRAPHY;

EID: 0030956973     PISSN: 0956540X     EISSN: None     Source Type: Journal    
DOI: 10.1111/j.1365-246X.1997.tb04069.x     Document Type: Article

References (27)

1. Bryan, G.H., 1889. The waves on a rotating liquid spheroid of finite duplicity, Phil Trans. A, 180, 187-219.
2. Creager, K.C. & Jordan, T.H., 1986. Aspherical structure of the coremantle boundary from PKP travel times, Geophys. Res. Lett., 13, 1497-1500.
3. de Vries, D. & Wahr, J.M., 1991. The effects of the solid inner core and non-hydrostatic structure on the Earth's forced nutations and Earth tides, J. geophys. Res., 96, 8275-8293.
4. Dehant, V., 1990. On the nutations of a more realistic Earth model, Geophys. J. Int., 100, 477-483.
5. Dickey, J.O., Eubanks, T.M. & Hide, R., 1990. Interannual and decade fluctuations in the Earth's rotation, in Variations in Earth Rotation, Geophys. Monogr. 59, pp. 157-161, eds McCarthy, D. & Carter, W.E., AGU, Washington, DC.
6. Forte, A. & Peltier, W., 1989. Core-mantle boundary topography and whole mantle convection, Geophys. Res. Lett., 16, 621-624.
7. Greenspan, H.P., 1968. The Theory of Rotating Fluids, Cambridge University Press, London.
8. Gwinn, C.R., Herring, T.A. & Shapiro, I.I., 1986. Geodesy by radio interferometry: studies of the forced nutations of the Earth, 2, Interpretation, J. geophys. Res., 91, 4755-4765.
9. Hager, B.H., Clayton, R.W., Richards, MA, Comer, R.P. & Dziewonski, A.M., 1985. Lower mantle heterogeneity, dynamic topography and the geoid, Nature, 313, 541-545.
10. Herring, T.A., Buffett, B.A., Mathews, P.M. & Shapiro, I.I., 1991. Forced nutations of the Earth: influence of inner core dynamics, 3, Very long baseline interferometry data analysis, J. geophys. Res., 96, 8259-8273.
11. Jones, M.N., 1985. Spherical Harmonics and Tensors for Classical Field Theory, John Wiley & Sons, New York, NY.
12. Kudlick, M.D., 1966. On transient motions in a contained, rotating fluid, PhD thesis, MIT, Cambridge, MA.
13. Mathews, P.M., Buffett, B.A., Herring, T.A. & Shapiro, I.I., 1991. Forced nutations of the Earth: influence of inner core dynamics, 1, Theory, J. geophys. Res., 96, 8219-8242.
14. Morelli, A. & Dziewonski, A.M., 1987. Topography of the core-mantle boundary and lateral homogeneity of the liquid core, Nature, 325, 678-683.
15. Neuberg, J., Hinderer, J. & Zurn, W., 1987. Stacking gravity tide observations in central Europe for the retrieval of the complex eigen-frequency of the nearly free-wobble, Geophys. J. R. astr. Soc., 91, 853-868.
16. Pulliam, J. & Stark, P., 1993. Bumps on the core-mantle boundary; are they facts or artifacts? J. geophys. Res., 98, 1943-1956.
17. Rodgers, A. & Wahr, J., 1993. Inference of core-mantle boundary topography from ISC PcP and PKP travel times, Geophys, J. Int., 115, 991-1011.
18. Sasao, T., Okubo, S. & Saito, M., 1980. A simple theory on the dynamical effects of a stratified fluid core upon nutational motion of the Earth, in Proc. IAU Symp. 78, pp. 165-183, eds Federov, E.P., Smith, M.L. & Bender, P.L., D. Reidel, Hingham, MA (SOS).
19. Smith, M.L., 1977. Wobble and nutation of the Earth, Geophys. J. R. astr. Soc., 50, 103-140.
20. Wahr, J.M., 1981a. A normal mode expansion for the forced response of a rotating Earth, Geophys. J. R. astr. Soc., 64, 651-675.
21. Wahr, J.M., 1981b. The forced nutations of an elliptical, rotating, elastic and oceanless Earth, Geophys. J. R. astr. Soc., 64, 705-727.
22. Wahr, J.M., 1981c. Body tides of an elliptical, rotating, elastic, and oceanless Earth, Geophys. J. R. astr. Soc., 64, 677-704.
23. Wahr, J.M., 1988. The theory of the Earth's orientation, with some new results for nutations, in The Impact of VLBI on Astrophysics and Geophysics, pp. 381-390, eds Reid M.J. & Moran J.M., D. Reidel, Hingham, MA.
24. Wahr, J.M. & de Vries, D., 1989. The possibility of lateral structure inside the core and its implications for nutation and Earth tide observations, Geophys. J. Int., 99, 511-519.
25. Wahr, J.M. & de Vries, D., 1990. The Earth's forced nutations: geophysical implications, in Variations in Earth Rotation, Geophys. Monogr. 59, pp. 79-84, eds McCarthy, D. & Carter, W.E., AGU, Washington, DC.
26. Wahr, J.M., Sasao, T. & Smith, M.L., 1981. Effect of the fluid core on changes in the length of day due to long period tides, Geophys. J. R. astr. Soc., 64, 635-650.
27. Zhu, S.Y. & Groten, E., 1989. Various aspects of numerical determination of nutation constants, I, Improvement of rigid-Earth nutation, Astron. J., 98, 1104-1111.