Jenny et al. (2025) Mass Change in Antarctica from 2002 to 2025 Using GRACE and GRACE-FO

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Identification

• Journal: Remote Sensing
• Year: 2025
• Date: 2025-11-28
• Authors: Barbara Jenny, Tim Jensen, R. Forsberg
• DOI: 10.3390/rs17233870

Research Groups

Not specified in the provided text.

Short Summary

This study compares five GRACE(-FO) Level-2 gravity field solutions using a mascon inversion method to estimate gridded mass change across Antarctica, revealing consistent negative mass trends from 2002 to 2025, with regional variations where Glacial Isostatic Adjustment model error exceeds inter-solution differences.

Objective

• To compare five different GRACE(-FO) Level-2 gravity field solutions to estimate and analyze gridded mass change in Antarctica, including 27 drainage basins.

Study Configuration

• Spatial Scale: All of Antarctica, specifically 27 drainage basins.
• Temporal Scale: April 2002 to January 2025 (overall period); specific observations for 2021, 2022, early 2023, and starting May 2023.

Methodology and Data

• Models used: Mascon inversion method, Glacial Isostatic Adjustment (GIA) model (for error assessment).
• Data sources: Five different GRACE(-FO) Level-2 gravity field solutions, derived from gravity field grids at orbit height.

Main Results

• All five GRACE(-FO) solutions consistently show negative mass trends for Antarctica over the period from April 2002 to January 2025.
• Mass accumulation was observed in East Antarctic basins 12 and 13 during 2021, 2022, and the beginning of 2023.
• A rapid mass loss commenced in East Antarctic basins 12 and 13 starting in May 2023.
• While regional differences exist between the solutions, the error associated with the Glacial Isostatic Adjustment (GIA) model is greater than the differences observed among the five GRACE(-FO) solutions examined.

Contributions

• Provides a comparative analysis of multiple GRACE(-FO) Level-2 solutions for Antarctic mass change, highlighting their consistency and regional variations.
• Quantifies the relative impact of GIA model uncertainty compared to the differences between various GRACE(-FO) solutions on mass change estimates.
• Offers updated regional mass change observations for specific East Antarctic basins, including recent accumulation and subsequent rapid loss events.

Funding

Not specified in the provided text.

Citation

@article{Jenny2025Mass,
  author = {Jenny, Barbara and Jensen, Tim and Forsberg, R.},
  title = {Mass Change in Antarctica from 2002 to 2025 Using GRACE and GRACE-FO},
  journal = {Remote Sensing},
  year = {2025},
  doi = {10.3390/rs17233870},
  url = {https://doi.org/10.3390/rs17233870}
}