Modeling gravimetric signatures of third-degree ocean tides and their detection in superconducting gravimeter records
Journal article, 2022

We 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 rootmean-square (RMS) deviation of 0.9–1.3mm 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 nm/s2 ) 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.

Tide gauge data

Degree-3 tides

Superconducting gravimetry

Tidal modeling

Tidal analysis


Roman Sulzbach

German Research Centre for Geosciences (GFZ)

Hartmut Wziontek

Federal Agency for Cartography and Geodesy (BKG)

Michael Hart-Davis

Deutsches Geodätisches Forschungsinstitut (DGFI)

Henryk Dobslaw

German Research Centre for Geosciences (GFZ)

Hans-Georg Scherneck

Chalmers, Space, Earth and Environment, Geoscience and Remote Sensing

Michel van Camp

Royal Observatory of Belgium

Ove Christian Dahl Omang

Norwegian Mapping Authority

Ezequiel D. Antokoletz

National University of La Plata

Christian Voigt

German Research Centre for Geosciences (GFZ)

Denise Dettmering

Deutsches Geodätisches Forschungsinstitut (DGFI)

Maik Thomas

German Research Centre for Geosciences (GFZ)

Journal of Geodesy

0949-7714 (ISSN) 1432-1394 (eISSN)

Vol. 96 35


Basic sciences


Onsala Space Observatory

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