Publications related to the GRACE Missions (no abstracts)

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Role of Barystatic Sea Level Change in Global Mass Conservation and Its Excitation to Length-Of-Day Variations

Shi, Qiqi, Zhou, Yonghong, Xu, Cancan, and Xu, Xueqing, 2025. Role of Barystatic Sea Level Change in Global Mass Conservation and Its Excitation to Length-Of-Day Variations. Earth and Space Science, 12(1):2024EA003848, doi:10.1029/2024EA003848.

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@ARTICLE{2025ESS...1203848S,
       author = {{Shi}, Qiqi and {Zhou}, Yonghong and {Xu}, Cancan and {Xu}, Xueqing},
        title = "{Role of Barystatic Sea Level Change in Global Mass Conservation and Its Excitation to Length-Of-Day Variations}",
      journal = {Earth and Space Science},
     keywords = {length-of-day, barystatic sea level, GRACE and GRACE follow-on, global mass conservation, earth rotation},
         year = 2025,
        month = jan,
       volume = {12},
       number = {1},
        pages = {2024EA003848},
     abstract = "{Barystatic sea level stores excess water mass from the atmosphere and
        land to maintain global mass conservations within the Earth
        system. Besides the secular contribution to global sea-level
        rise, changes in barystatic sea level also play an important
        role in mass-induced length-of-day (LOD) variations over a few
        years or shorter periods. Compared to barystatic sea level
        changes deduced from the geophysical models, Gravity Recovery
        and Climate Experiment and GRACE follow-on (GRACE/GFO)
        measurements provide actual observed ocean mass changes. Here,
        we investigate short-term both seasonal (annual and semiannual)
        and non-seasonal LOD variations caused by mass redistribution
        using GRACE/GFO mass estimates and effective angular momentum
        (EAM) products, particularly quantitatively assessing the
        excitation from the barystatic sea level. Note that correcting
        the problem of global mass non-conservation is necessary for
        GRACE/GFO mass estimates in both spherical harmonic and mascon
        solutions to calculate the LOD excitation accurately. LOD mass
        term contributions derived from GRACE/GFO mass estimates
        considering global mass conservation show high consistency with
        satellite laser ranging results and are much closer to geodetic
        LOD observations than EAM products at seasonal and non-seasonal
        time scales. The barystatic sea level exhibits the most
        significant amplitude in mass-induced LOD variations,
        compensating for most land hydrological excitation, but shows no
        clear correlation with the atmosphere. Due to slight
        fluctuations in cryospheric effects and the substantial
        compensatory action of the barystatic sea level, differences in
        the land hydrological excitation do not lead to significant
        deviations in the total LOD mass term between EAM products and
        GRACE/GFO mass estimates.}",
          doi = {10.1029/2024EA003848},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2025E&SS...1203848S},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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