Thu Aug 14, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Peng, Zhenran, Wang, Linsong, Liang, Qing, and Chen, Chao, 2025. Frequency-Dependent Scaling Factors to Estimate Multiple Time-Period Global Mass Changes Observed by GRACE/GRACE-FO. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 18:8025–8039, doi:10.1109/JSTARS.2025.3546524.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025IJSTA..18.8025P,
author = {{Peng}, Zhenran and {Wang}, Linsong and {Liang}, Qing and {Chen}, Chao},
title = "{Frequency-Dependent Scaling Factors to Estimate Multiple Time-Period Global Mass Changes Observed by GRACE/GRACE-FO}",
journal = {IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing},
keywords = {Global mass changes, gravity recovery and climate experiment/follow-on (GRACE/GRACE-FO), multiple time scale, satellite gravity, scaling factor (SF)},
year = 2025,
month = jan,
volume = {18},
pages = {8025-8039},
abstract = "{The scaling factor method is commonly used to restore near-true time-
variable gravity from gravity recovery and climate
experiment/follow-on (GRACE/GRACE-FO). This study presents a
novel method for computing frequency-dependent scaling factors
(FDSFs) using spherical harmonic decomposition of GRACE/GRACE-FO
Level-2 data at full frequency. Two applications based on a
global hydrological model (land excluding Greenland and
Antarctica) and a combined model (Greenland) demonstrate that
FDSFs reduce the theoretical recovery residuals versus using a
single scaling factor by 11.0 across short-term, seasonal,
inter-annual, and long-term scales. Given the ability to capture
more model details, the FDSFs improved the estimates at the
basin scale and in glacier regions such as High Mountain Asia.
In Greenland, the FDSF-scaled results revealed an enhanced
amplitude with an averaged relative increase of 38 and improved
resolution to 0.5 degrees below 1500 m, compared with the GRACE
Level-3 mascon solution. Our results also imply that using FDSFs
would cause uncertainties, particularly in scaled short-term
mass change, which could be attributed to the large discrepancy
between the hydrological model and GRACE/GRACE-FO. Our study
provides insights into estimating mass changes using a
downscaled GRACE/GRACE-FO solution and suggests that users
select FDSFs for regions of interest based on a reliable model.}",
doi = {10.1109/JSTARS.2025.3546524},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025IJSTA..18.8025P},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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Thu Aug 14, F. Flechtner