Comparison of two methods for calculating tidal loads
Tóm tắt
The spherical harmonic expansion up to order n = 1440 of the oceanic tidal heights is derived for the waves of the CSR3.0 model. On the basis of the load Love numbers for the PREM model, the oceanic load effect in gravity is calculated. It is shown that the results provided by the spherical expansion technique and the method utilizing the Green’s function satisfactorily agree even at the order of the expansion n = 720. The obtained model predictions are compared to the oceanic load effect measured by the Global Geodynamics Project (GGP) network of superconducting gravimeters.
Tài liệu tham khảo
Boy, J.-P., Llubes, M., Hinderer, J., and Florsch, N., A Comparison of Tidal Ocean Loading Models Using Superconducting Gravimeter Data, J. Geophys. Res., 2003, vol. 108, no. B4, p. 2193.
Vinogradova, O.Yu., Oceanic Tidal Loads near the European Coast Calculated from Green’s Functions, Izv. Phys. Solid Earth, 2012, vol. 48, no. 7, pp. 572–586.
Vinogradova, O.Yu. and Spiridonov, E.A., Comparative Analysis of Oceanic Corrections to Gravity Calculated from the PREM and IASP91 Models, Izv. Phys. Solid Earth, 2012, vol. 48, no. 2, pp. 162–170.