Modeling gravimetric signatures of third-degree ocean tides and their detection in superconducting gravimeter records

Abstract We employ the barotropic, data-unconstrained ocean tide model TiME to derive an atlas for degree-3 tidal constituents including monthly terdiurnal species. The is optimized with respect gauge data set TICON-td that extended include respective of diurnal and higher frequencies. validation shows a root-mean-square (RMS) deviation 0.9–1.3 mm individual further load tide-induced gravimetric signals by two means (1) global Love number approach (2) evaluating Greens-integrals at 16 selected locations superconducting gravimeters. RMS between amplitudes derived using both methods below $$0.5 \ $$ 0.5 nGal ( $$1 1 $$= 0.01 \frac{\text {nm}}{\text {s}^2}$$ = 0.01 nm s 2 ) when excluding near-coastal Utilizing ETERNA-x, recently upgraded reworked analysis software, we additionally these stations, based on hypothesis-free wave grouping approach. demonstrate this feasible, yielding amplitude predictions only few 10 nGal, it agrees modeled level 63–80% mean signal amplitude. Larger deviations are found lowest signals, or shorter noisier sets.