Publications related to the GRACE Missions (no abstracts)

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Optimized J2 Recovery for Multi-Decadal Geophysical Studies

Loomis, B. D., Sabaka, T. J., Rachlin, K. E., Croteau, M. J., Lemoine, F. G., Nerem, R. S., and Bellas-Manley, A., 2025. Optimized J2 Recovery for Multi-Decadal Geophysical Studies. Geophysical Research Letters, 52(7):2024GL114472, doi:10.1029/2024GL114472.

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@ARTICLE{2025GeoRL..5214472L,
       author = {{Loomis}, B.~D. and {Sabaka}, T.~J. and {Rachlin}, K.~E. and {Croteau}, M.~J. and {Lemoine}, F.~G. and {Nerem}, R.~S. and {Bellas-Manley}, A.},
        title = "{Optimized J2 Recovery for Multi-Decadal Geophysical Studies}",
      journal = {\grl},
     keywords = {J2, satellite laser ranging, gravity, length of day, GRACE, climate},
         year = 2025,
        month = apr,
       volume = {52},
       number = {7},
        pages = {2024GL114472},
     abstract = "{The time history of the Earth's dynamic oblateness, or ${J}_{2}$, is a
        unique climate data record, with its estimation from satellite
        laser ranging (SLR) tracking data beginning in 1976. Due to its
        impact on variations in length of day (LOD), the long-term
        ${J}_{2}$ time series is frequently applied to LOD studies and
        their contributions, which include tidal friction, glacial
        isostatic adjustment, ice melt, sea level change, and the
        angular momentum exchange between the fluid outer core and the
        mantle. Previous studies demonstrated that the accurate recovery
        of ${J}_{2}$ requires the use of time variable gravity models
        from GRACE when processing the SLR tracking data. However, no
        reliable models exist prior to GRACE's 2002 launch, calling into
        to question the accuracy and utility of the pre-GRACE estimates.
        Here we present a new approach to accurately recover ${J}_{2}$
        without gravity modeling, resulting in the first fully
        consistent long-term solution for climate studies.}",
          doi = {10.1029/2024GL114472},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2025GeoRL..5214472L},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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