3:30 PM - 4:30 PM
[G02-P-10] Geoid and Moho-depth modeling in Cyprus
A high-resolution gravimetric geoid determination was carried out for the wider area of Cyprus using gravity data from national and international databases, local and global digital elevation and bathymetry models and satellite altimetry data for the surrounding sea areas. The EGM08 global geopotential model was used as a reference surface to model long to medium frequencies of the gravity field spectrum. Terrain and bathymetry effects on gravity anomalies have been studied through different reduction schemes and various validation procedures were applied in order to finally produce a reliable gravity grid of 1 arcmin resolution. Geoid solutions were computed by Least Squares Collocation (LSC) and Stokes integral employing Fast Fourier Transform (FFT) techniques using the rigorous 1D spherical kernel, within a Remove-Compute-Restore (RCR) approach. The geoid solutions show an absolute accuracy at the level of 4cm for the continental area of Cyprus, after comparison with GPS/leveling derived geoid heights, and a relative accuracy at the level of about 8ppm over baselines of 10km. These accuracies meet the nowadays requirements of a wide spectrum of geodetic, geophysical and engineering projects. In a second step, Moho depths were estimated for both land and marine areas following the inversion of the previously compiled gravity grid complemented with density and GOCE data. The geoid and Moho models computed in this study show the strong signature and peculiar futures of the gravity field in the test area and the wider eastern Mediterranean basin. To this respect, further geodetic and geophysical considerations form the basis for future important research in the area under study.