Communication publiée dans un ouvrage (Colloques, congrès, conférences scientifiques et actes)
What we can learn about ocean tides from tide gauge and gravity loading measurements?
FRANCIS, Olivier; Mazzega, P.
1991 • In Kakkuri, Juhani (Ed.) Eleventh International Symposium on Earth Tides, Proceedings of the meeting held July 31 - August 5, 1989, in Helsinki, Finland
[en] The harmonic constants from tide gauge stations and from gravity loading measurements of the ICET (International Center for Earth Tides) data bank are separately inverted to produce M2 cotidal maps on a global scale. The optimal interpolation of these data, based on the total inverse theory in L2 norm, makes use of a set of a priori stationary and isotropic covariance functions deduced from a global hydrodynamical model and from its corresponding gravity loading map. The preliminary results presented with formal error estimates are surprisingly good, in particular the M2 maps obtained from the numerous tide gauge data. These results are discussed and further lines of work are drawn.
