000005779 001__ 5779
000005779 005__ 20220502083249.0
000005779 0247_ $$2DOI$$a10.1007/s00190-022-01609-w
000005779 037__ $$aSCART-2022-0060
000005779 100__ $$aSulzbach, R.
000005779 245__ $$aModeling Gravimetric Signatures of Third-Degree Ocean Tides and their Detection in Superconducting Gravimeter Records
000005779 260__ $$c2022
000005779 520__ $$aWe employ the barotropic, data-unconstrained ocean tide model TiME to derive an atlas for degree-3 tidal constituents including monthly to terdiurnal tidal species. The model is optimized with respect to the tide gauge data set TICON-td that is extended to include the respective tidal constituents of diurnal and higher frequencies. The tide gauge validation shows a root-mean-square (RMS) deviation of 0.9–1.3 mm for the individual species. We further model the load tide-induced gravimetric signals by two means (1) a global load Love number approach and (2) evaluating Greens-integrals at 16 selected locations of superconducting gravimeters. The RMS deviation between the amplitudes derived using both methods is below 0.5 nGal (1 nGal =0.01 nms-2) when excluding near-coastal gravimeters. Utilizing ETERNA-x, a recently upgraded and reworked tidal analysis software, we additionally derive degree-3 gravimetric tidal constituents for these stations, based on a hypothesis-free wave grouping approach. We demonstrate that this analysis is feasible, yielding amplitude predictions of only a few 10 nGal, and that it agrees with the modeled constituents on a level of 63–80% of the mean signal amplitude. Larger deviations are only found for lowest amplitude signals, near-coastal stations, or shorter and noisier data sets.
000005779 594__ $$aNO
000005779 6531_ $$aThird-degree ocean tides
000005779 6531_ $$aTidal potential
000005779 6531_ $$aSuperconducting gravimeters
000005779 6531_ $$aMembach
000005779 700__ $$aWziontek, H.
000005779 700__ $$aHart-Davis, M.
000005779 700__ $$aDobslaw, H.
000005779 700__ $$aScherneck, H.-G.
000005779 700__ $$aVan Camp, M.
000005779 700__ $$aOmang, O.C.D.
000005779 700__ $$aAntokoletz, E.D.
000005779 700__ $$aVoigt, C.
000005779 700__ $$aDettmering, D.
000005779 700__ $$aThomas, M.
000005779 773__ $$n35$$pJournal of Geodesy$$v96$$y2022
000005779 8560_ $$fmichel.vancamp@observatoire.be
000005779 85642 $$ahttps://doi.org/10.1007/s00190-022-01609-w
000005779 905__ $$apublished in
000005779 980__ $$aREFERD