Time-variable gravity-potential data for 34 optical-clock study sites, 2015–2017

This dataset supports the study of time-variable effective gravity-potential corrections for geoid-referenced optical-clock comparisons and chronometric levelling. It contains processed data and representative results for 34 globally distributed sites over 2015–2017. The dataset covers seven geophysical contributions: solid Earth tides, ocean tidal loading, solid pole tide, ocean pole tide, atmospheric loading, terrestrial-water loading, and non-tidal ocean loading. Solid Earth tides and ocean tidal loading retain a 30-min temporal resolution, whereas pole tides and non-tidal loading are represented by daily values. The archived results include single-site series and statistics, synchronous differences for 66 pairs formed by 12 clock-related laboratory sites, and numerical comparisons of non-tidal loading calculated using finite-degree spherical-harmonic synthesis, residual-field integration, and global Green-function integration. A subset of input and intermediate data is provided to document the computational workflow and facilitate verification of the results reported in the associated manuscript. Third-party models and software are not redistributed; their sources and roles in the processing chain are documented in the accompanying README file.