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Updated: Aug 2, 2025

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
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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
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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.

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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.