Thu Aug 14, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
You, Wei, Qian, Ke, Wan, Xiangyu, Yu, Biao, Zhang, Jiahui, Pu, Lun, Shu, Jianwei, and Liu, Chong, 2025. Spatial-domain combination of GRACE monthly time-variable gravity models based on multiple weighting strategies and comparison of models' performance in the Caspian Sea. Scientific Reports, 15(1):3962, doi:10.1038/s41598-025-87922-8.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025NatSR..15.3962Y,
author = {{You}, Wei and {Qian}, Ke and {Wan}, Xiangyu and {Yu}, Biao and {Zhang}, Jiahui and {Pu}, Lun and {Shu}, Jianwei and {Liu}, Chong},
title = "{Spatial-domain combination of GRACE monthly time-variable gravity models based on multiple weighting strategies and comparison of models' performance in the Caspian Sea}",
journal = {Scientific Reports},
keywords = {GRACE, Oceanic accuracy weighting, Mascon, Caspian Sea},
year = 2025,
month = feb,
volume = {15},
number = {1},
eid = {3962},
pages = {3962},
abstract = "{The Gravity Recovery and Climate Experiment (GRACE) mission provides
original observations to different institutions for the
production of various monthly time-variable gravity field models
(TVGFMs). Aiming to optimize the signal-to-noise ratio of
TVGFMs, we determine to combine them in the spatial domain. This
combination comprises two approaches: one combines spherical
harmonic coefficient (SHC) solutions, and the other combines SHC
and mascon (mass concentration) solutions together. For each
approach, we employ four old weighting schemes and one new
scheme named oceanic accuracy weighting. We then assessed the
combined models through both internal and external validations.
In external validation, we compare the Caspian Sea level changes
derived from the combined models with those obtained from
satellite altimeter. Our results reveal an improvement of the
SHC combination using variance component estimation (VCE)
weighting compared to any single SHC solution. Moreover, we
found enhanced performance in the combined models with the
incorporation of mascon solutions, particularly employing the
oceanic accuracy weighting. These findings underscore the
efficacy of model combination in improving performance, and
emphasize the importance of selecting appropriate weighting
strategies for integrating GRACE solutions. Specifically, we
recommend VCE weighting scheme for combining SHC solutions only
and oceanic accuracy weighting scheme for integrating mascon and
SHC solutions.}",
doi = {10.1038/s41598-025-87922-8},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025NatSR..15.3962Y},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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