Publications related to the GRACE Missions (no abstracts)

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Estimation of regional mass anomalies from Gravity Recovery and Climate Experiment (GRACE) over Himalayan region

Agrawal, R., Singh, S. K., Rajawat, A. S., and Ajai, 2014. Estimation of regional mass anomalies from Gravity Recovery and Climate Experiment (GRACE) over Himalayan region. ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XL8:329–332, doi:10.5194/isprsarchives-XL-8-329-2014.

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@ARTICLE{2014ISPAr.XL8..329A,
       author = {{Agrawal}, R. and {Singh}, S.~K. and {Rajawat}, A.~S. and {Ajai}},
        title = "{Estimation of regional mass anomalies from Gravity Recovery and Climate Experiment (GRACE) over Himalayan region}",
      journal = {ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences},
         year = 2014,
        month = nov,
       volume = {XL8},
        pages = {329-332},
     abstract = "{Time-variable gravity changes are caused by a combination of postglacial
        rebound, redistribution of water and snow/ice on land and as
        well as in the ocean. The Gravity Recovery and Climate
        Experiment (GRACE) satellite mission, launched in 2002, provides
        monthly average of the spherical harmonic co-efficient. These
        spherical harmonic co-efficient describe earth's gravity field
        with a resolution of few hundred kilometers. Time-variability of
        gravity field represents the change in mass over regional level
        with accuracies in cm in terms of Water Equivalent Height (WEH).
        The WEH reflects the changes in the integrated vertically store
        water including snow cover, surface water, ground water and soil
        moisture at regional scale. GRACE data are also sensitive
        towards interior strain variation, surface uplift and surface
        subsidence cover over a large area. \textbackslash\textbackslash
        GRACE data was extracted over the three major Indian River
        basins, Indus, Ganga and Brahmaputra, in the Himalayas which are
        perennial source of fresh water throughout the year in Northern
        Indian Plain. Time series analysis of the GRACE data was carried
        out from 2003-2012 over the study area. Trends and amplitudes of
        the regional mass anomalies in the region were estimated using
        level 3 GRACE data product with a spatial resolution at 10 by 10
        grid provided by Center for Space Research (CSR), University of
        Texas at Austin. Indus basin has shown a subtle decreasing trend
        from 2003-2012 however it was observed to be statistically
        insignificant at 95 \% confidence level. Ganga and Brahmaputra
        basins have shown a clear decreasing trend in WEH which was also
        observed to be statistically significant. The trend analysis
        over Ganga and Brahamputra basins have shown an average annual
        change of -1.28 cm and -1.06 cm in terms of WEH whereas Indus
        basin has shown a slight annual change of -0.07 cm. This
        analysis will be helpful to understand the loss of mass in terms
        of WEH over Indian Himalayas and will be crucial for
        hydrological and climate applications at regional scale.}",
          doi = {10.5194/isprsarchives-XL-8-329-2014},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2014ISPAr.XL8..329A},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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