Technical note: GRACE-compatible filtering of water storage data sets via spatial autocorrelation analysis

Sharifi, Ehsan; Haas, Julian; Boergens, Eva; Dobslaw, Henryk; Güntner, Andreas

doi:10.5194/hess-29-6985-2025

Articles | Volume 29, issue 23

https://doi.org/10.5194/hess-29-6985-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/hess-29-6985-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 29, issue 23

Technical note

|

03 Dec 2025

Technical note |

| 03 Dec 2025

Technical note: GRACE-compatible filtering of water storage data sets via spatial autocorrelation analysis

Ehsan Sharifi, Julian Haas, Eva Boergens, Henryk Dobslaw, and Andreas Güntner

Data sets

Global Gravity-based Groundwater Product (G3P). V. 1.12 Andreas Güntner et al. https://doi.org/10.5880/G3P.2024.001

Short summary

This study presents a method to make the spatial resolution of global Water Storage Compartments (WSCs) compatible with terrestrial water storage (TWS) data from Gravity Recovery And Climate Experiment (GRACE) missions. The method compares the spatial structure of the WSCs and TWS by considering the correlation between neighboring grid cells. An isotropic Gaussian filter with an optimal filter width of 250 km is found to be the most suitable, ensuring compatibility for consistent comparison with GRACE data in hydrological applications.