GRACE and GRACE-FO Related Publications (no abstracts)

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Exploring steric sea level variability in the Eastern Tropical Atlantic Ocean: a three-decade study (1993–2022)

Ghomsi, Franck Eitel Kemgang, Mohamed, Bayoumy, Raj, Roshin P., Bonaduce, Antonio, Abiodun, Babatunde J., Nagy, Hazem, Quartly, Graham D., and Johannessen, Ola M., 2024. Exploring steric sea level variability in the Eastern Tropical Atlantic Ocean: a three-decade study (1993–2022). Scientific Reports, 14(1):20458, doi:10.1038/s41598-024-70862-0.

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@ARTICLE{2024NatSR..1420458G,
       author = {{Ghomsi}, Franck Eitel Kemgang and {Mohamed}, Bayoumy and {Raj}, Roshin P. and {Bonaduce}, Antonio and {Abiodun}, Babatunde J. and {Nagy}, Hazem and {Quartly}, Graham D. and {Johannessen}, Ola M.},
        title = "{Exploring steric sea level variability in the Eastern Tropical Atlantic Ocean: a three-decade study (1993{\textendash}2022)}",
      journal = {Scientific Reports},
     keywords = {Eastern Tropical Atlantic Ocean, Altimetry, Reanalysis, Sea level rise, Climate indices},
         year = 2024,
        month = sep,
       volume = {14},
       number = {1},
          eid = {20458},
        pages = {20458},
     abstract = "{Sea level rise (SLR) poses a significant threat to coastal regions
        worldwide, particularly affecting over 60 million people living
        below 10 m above sea level along the African coast. This study
        analyzes the spatio-temporal trends of sea level anomaly (SLA)
        and its components (thermosteric, halosteric and ocean mass) in
        the Eastern Tropical Atlantic Ocean (ETAO) from 1993 to 2022.
        The SLA trend for the ETAO, derived from satellite altimetry, is
        3.52 {\ensuremath{\pm}} 0.47 mm/year, similar to the global
        average of 3.56 {\ensuremath{\pm}} 0.67 mm/year. Of the three
        upwelling regions, the Gulf of Guinea (GoG) shows the highest
        regional trend of 3.42 {\ensuremath{\pm}} 0.12 mm/year. Using
        the ARMORD3D dataset, a positive thermosteric sea level trend of
        0.88 {\ensuremath{\pm}} 0.04 mm/year is observed, particularly
        in the equatorial and southern Atlantic regions. The steric
        component drives the interannual SLA variability, while the
        ocean mass component dominates the long-term trends, as
        confirmed by the GRACE and GRACE-FO missions for
        2002{\textendash}2022. For those two decades, the total SLR from
        altimetry amounts to 3.80 {\ensuremath{\pm}} 0.8 mm/year, whilst
        the steric component is reduced to only 0.19 {\ensuremath{\pm}}
        0.05 mm/year, leaving a residual increase in the ETAO of 3.69
        {\ensuremath{\pm}} 0.5 mm/year. The independent mass change from
        GRACE amounts to 2.78 {\ensuremath{\pm}} 0.6 mm/year for this
        region, which just closes the sea level budget within present
        uncertainty levels. Spatial analysis of the steric components
        indicates a warming along the equatorial African coast including
        the GoG and a freshening near Angola. Strong correlations with
        regional climate factors, particularly the Tropical South
        Atlantic Index, highlight the influence of persistent climate
        modes. These findings underscore the urgent need for mitigation
        and adaptation strategies to SLR in the ETAO, especially for
        densely populated coastal communities.}",
          doi = {10.1038/s41598-024-70862-0},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2024NatSR..1420458G},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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