Publications related to the GRACE Missions (no abstracts)

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Hydrological change from space geodetic data and correlation with climate indices in Sudan

Godah, Walyeldeen, Yadeta, Samuel Milki, and Braun, Alexander, 2025. Hydrological change from space geodetic data and correlation with climate indices in Sudan. Journal of African Earth Sciences, 227:105608, doi:10.1016/j.jafrearsci.2025.105608.

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@ARTICLE{2025JAfES.22705608G,
       author = {{Godah}, Walyeldeen and {Yadeta}, Samuel Milki and {Braun}, Alexander},
        title = "{Hydrological change from space geodetic data and correlation with climate indices in Sudan}",
      journal = {Journal of African Earth Sciences},
     keywords = {Hydrological change, Climate indices, Space geodetic data, GRACE, Satellite altimetry},
         year = 2025,
        month = jul,
       volume = {227},
          eid = {105608},
        pages = {105608},
     abstract = "{Terrestrial hydrological data in Sudan are heterogeneous with a limited
        quantity and quality that hinders reliable monitoring of natural
        or anthropogenic hydrological change. Thus, alternative data
        sources such as satellite observations are essential for
        monitoring hydrological change in Sudan. Moreover, like many
        other regions around the world, hydrological change in Sudan is
        strongly related to climate change presenting an opportunity to
        analyse the correlation of these processes. The aim of this
        research is to investigate the usefulness of space geodetic data
        to monitor hydrological change in Sudan and its relation with
        climate indices. Temporal variations of equivalent water
        thickness were determined over the area of Sudan using GLDAS
        dataset and data from the Gravity Recovery and Climate
        Experiment (GRACE) and GRACE Follow{\textendash}On
        (GRACE{\textendash}FO) satellite missions. Temporal surface
        water variations at nine river crossings were obtained from
        satellite altimetry (Sentinel, Jason-2/3). The correlations
        between temporal variations of equivalent water thickness and
        sea surface temperature from both the El
        Ni{\~n}o{\textendash}Southern Oscillation and the Indian Ocean
        Dipole climate indices were investigated. The results indicate
        good agreement between temporal variations of equivalent water
        thickness from GRACE/GRACE{\textendash}FO data and GLDAS
        dataset. These temporal variations of equivalent water thickness
        were further correlated with the temporal surface water
        variations from altimetry data. In addition, there exist clear
        correlations between hydrology change in Sudan and sea surface
        temperature from El Ni{\~n}o 1 + 2 and El Ni{\~n}o 3 climate
        indices. In general, the results revealed the usefulness of
        space geodetic data for determining hydrological change in
        Sudan.}",
          doi = {10.1016/j.jafrearsci.2025.105608},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2025JAfES.22705608G},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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