Publications related to the GRACE Missions (no abstracts)

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Trends of Steric Sea Level Oscillations in the North Atlantic

Belonenko, T. V. and Koldunov, A. V., 2019. Trends of Steric Sea Level Oscillations in the North Atlantic. Izvestiya Atmospheric and Oceanic Physics, 55(9):1106–1113, doi:10.1134/S0001433819090081.

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@ARTICLE{2019IzAOP..55.1106B,
       author = {{Belonenko}, T.~V. and {Koldunov}, A.~V.},
        title = "{Trends of Steric Sea Level Oscillations in the North Atlantic}",
      journal = {Izvestiya Atmospheric and Oceanic Physics},
     keywords = {sea level, steric oscillations, trend, Atlantic Ocean, satellite altimetry, GRACE, Greenland, SODA, EN4, ARMOR},
         year = 2019,
        month = dec,
       volume = {55},
       number = {9},
        pages = {1106-1113},
     abstract = "{We consider trends of sea level steric oscillations in the North
        Atlantic in 2003{\textendash}2015 using two independent
        approaches. The first method is based on the multidisciplinary
        application of altimetry (AVISO) and gravimetry (GRACE mission)
        data. The second method is based on the integral assessment of
        steric oscillations using variations in the fluid volume caused
        by variations in water density: the calculations are carried out
        using the SODA, EN4, and ARMOR reanalysis data. It is shown that
        the application of the combined altimetry and GRACE data result
        in overestimated values of steric oscillations and their trends.
        This is related to the fact that the GRACE observations show the
        variations in the ocean mass; hence the sea level variations are
        presented in a relative coordinate system which is not the
        geocentric system. This system does not take into account the
        effects of the elastic deformation of the ocean bottom and the
        corresponding redistribution of the water volumes. It is shown
        that the maximum bias of these estimates and the errors in
        determining the steric oscillations and their trends based on
        the first method is characteristic of regions located near
        Greenland. This is caused by the contribution of the negative
        trend component to the GRACE data. If the estimates are made in
        regions remote from Greenland coasts, the trend component in the
        GRACE measurements is insignificantly manifested and the trends
        in the steric oscillations calculated using the method that
        jointly uses the AVISO and GRACE data are similar to the trends
        in the sea level variations based on the altimetry data. The
        trends of the steric oscillations of the sea level calculated
        from the reanalysis data are similar in the spatial distribution
        between both calculations and also similar to the trends in the
        sea level variations based on the altimetry data.}",
          doi = {10.1134/S0001433819090081},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2019IzAOP..55.1106B},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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