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Estimating GRACE terrestrial water storage anomaly using an improved point mass solution
Vagner Ferreira1,2, Bin Yong3, Henry Montecino4
1State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China. vagnergf@hhu.edu.cn.
Scientific Data
|April 22, 2023
Summary
New terrestrial water storage anomaly (TWSA) data from Hohai University (HHU-) IPM offers reliable hydrological insights. This data, derived from novel processing, complements existing GRACE TWSA products for regional water budget assessments.
Area of Science:
- Earth Science
- Hydrology
- Geophysics
Background:
- Terrestrial water storage anomaly (TWSA) data from the Gravity Recovery and Climate Experiment (GRACE) is crucial for hydrological studies.
- Current TWSA products include mascon solutions and spherical harmonic coefficient (SHC) syntheses, with mascons offering advantages in local geophysical data integration.
Purpose of the Study:
- To develop and present novel TWSA data using an alternative processing approach based on spherical harmonic coefficients.
- To enrich the portfolio of user-friendly TWSA datasets derived from different algorithms.
Main Methods:
- Utilized a novel processing protocol for TWSA data, re-sampling at 0.25 arc-degrees spanning 2002-2022.
- Employed the improved point mass (IPM) parameterization and synthesized residual gravitational potential as observations.
Main Results:
- The Hohai University (HHU-) IPM TWSA data demonstrated reliable agreement with established mascon solutions.
- The new dataset provides a valuable alternative for hydrological applications.
Conclusions:
- The HHU-IPM TWSA dataset is instrumental for regional hydrological applications.
- This data enables improved assessment of regional water budgets, complementing existing GRACE-derived products.
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