000008136 001__ 8136
000008136 005__ 20260708130404.0
000008136 0247_ $$2DOI$$a10.1093/gji/ggag023
000008136 037__ $$aSCART-2026-0144
000008136 100__ $$aSaraswati, Anita
000008136 245__ $$aSeparating climate and deep Earth signals in satellite gravimetry: a global assessment
000008136 260__ $$c2026
000008136 520__ $$aThis study aims to evaluate the effectiveness of the remove-restore method applied to GRACE (Gravity Recovery and Climate Experiment) gravity solutions, in which climate-related signals are first removed to allow a more meaningful interpretation of residual gravity signals associated with dynamic processes in Earth’s deep interior. By removing seasonal cycles and long-term trends, the analysis focuses on non-seasonal variations where causal attribution is clearer. Results indicate that climate correction reduces GRACE signal variability by approximately 30 per cent over both oceanic and continental regions, with the strongest impact observed in major river basins. The correction is most effective for temporal scales below 10 yr and spatial scales up to spherical harmonic degree 25. While overall variability decreases, certain frequency bands exhibit increased variability, suggesting a potential degradation of the signal due to model or data limitations. Globally, correlations between corrected GRACE signals and key climate indices largely diminish, confirming substantial removal of climate-related variability. However, the climate contribution to time-variable gravity beyond seasonal scales likely exceeds 30 per cent, indicating incomplete correction and occasional alteration of residual signals that complicate the interpretation of deeper Earth processes. Despite these challenges, climate model-based correction shows promise for advancing source separation and deepening understanding of Earth’s interior dynamics via time-variable gravity data, contingent on future improvements in climate modelling.
000008136 594__ $$aNO
000008136 6531_ $$aSatellite gravity
000008136 6531_ $$aTime variable gravity
000008136 6531_ $$aHydrogeophysics
000008136 6531_ $$aPlanetary interiors
000008136 700__ $$aPfeffer, Julia
000008136 700__ $$ade Viron, Olivier
000008136 700__ $$aMandea, Mioara
000008136 773__ $$pGeophysical Journal International$$y2026
000008136 8560_ $$fanita.saraswati@ksb-orb.be
000008136 905__ $$apublished in
000008136 980__ $$aREFERD