Publications related to the GRACE Missions (no abstracts)

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Spatial-domain combination of GRACE monthly time-variable gravity models based on multiple weighting strategies and comparison of models' performance in the Caspian Sea

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.

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@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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