Publications related to the GRACE Missions (no abstracts)

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GRACE Detection of Transient Mass Redistributions During a Mineral Phase Transition in the Deep Mantle

Gaugne Gouranton, Charlotte, Panet, Isabelle, Greff-Lefftz, Marianne, Mandea, Mioara, and Rosat, Séverine, 2025. GRACE Detection of Transient Mass Redistributions During a Mineral Phase Transition in the Deep Mantle. Geophysical Research Letters, 52(17):e2025GL116408, doi:10.1029/2025GL116408.

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@ARTICLE{2025GeoRL..5216408G,
       author = {{Gaugne Gouranton}, Charlotte and {Panet}, Isabelle and {Greff-Lefftz}, Marianne and {Mandea}, Mioara and {Rosat}, S{\'e}verine},
        title = "{GRACE Detection of Transient Mass Redistributions During a Mineral Phase Transition in the Deep Mantle}",
      journal = {\grl},
     keywords = {time-varying gravity, core-mantle boundary, deep mantle, mass redistributions},
         year = 2025,
        month = sep,
       volume = {52},
       number = {17},
          eid = {e2025GL116408},
        pages = {e2025GL116408},
     abstract = "{The temporal evolution of the core-mantle boundary (CMB) is of critical
        importance in elucidating the dynamic interactions between the
        fluid core and the solid mantle, but remains largely unknown. To
        investigate corresponding mass redistributions, we analyze GRACE
        satellite and Satellite Laser Ranging (SLR) measurements of the
        2003{\textendash}2015 space-time variations of the Earth's
        gravity field and search for transient gravity changes at large
        spatial scales. We detect an anomalous North-South oriented
        gravity signal in the Eastern Atlantic Ocean in January 2007,
        evolving at timescales of few years and less. We show that this
        signal cannot be fully explained by surface water mass
        redistributions, and probably originates, at least partly, from
        the D'' layer. We suggest it could reflect temporal changes in
        the depth of the perovskite to post-perovskite phase boundary
        within vertically moving thermal heterogeneities at the base of
        lower mantle upwellings, creating decimetric CMB topography
        changes over ${\sim} $2 years.}",
          doi = {10.1029/2025GL116408},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2025GeoRL..5216408G},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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