Publications related to the GRACE Missions (no abstracts)

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Monitoring Groundwater Variations from Satellite Gravimetry and Hydrological Models: A Comparison with in-situ Measurements in the Mid-Atlantic Region of the United States

Xiao, Ruya, He, Xiufeng, Zhang, Yonglei, Ferreira, Vagner G., and Chang, Liang, 2015. Monitoring Groundwater Variations from Satellite Gravimetry and Hydrological Models: A Comparison with in-situ Measurements in the Mid-Atlantic Region of the United States. Remote Sensing, 7(1):686–703, doi:10.3390/rs70100686.

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@ARTICLE{2015RemS....7..686X,
       author = {{Xiao}, Ruya and {He}, Xiufeng and {Zhang}, Yonglei and {Ferreira}, Vagner G. and {Chang}, Liang},
        title = "{Monitoring Groundwater Variations from Satellite Gravimetry and Hydrological Models: A Comparison with in-situ Measurements in the Mid-Atlantic Region of the United States}",
      journal = {Remote Sensing},
     keywords = {groundwater, terrestrial water storage, GRACE, GLDAS, satellite gravity},
         year = 2015,
        month = jan,
       volume = {7},
       number = {1},
        pages = {686-703},
     abstract = "{Aimed at mapping time variations in the Earth's gravity field, the
        Gravity Recovery and Climate Experiment (GRACE) satellite
        mission is applicable to access terrestrial water storage (TWS),
        which mainly includes groundwater, soil moisture (SM), and snow.
        In this study, SM and accumulated snow water equivalent (SWE)
        are simulated by the Global Land Data Assimilation System
        (GLDAS) land surface models (LSMs) and then used to isolate
        groundwater anomalies from GRACE-derived TWS in Pennsylvania and
        New York States of the Mid-Atlantic region of the United States.
        The monitoring well water-level records from the U.S. Geological
        Survey Ground-Water Climate Response Network from January 2005
        to December 2011 are used for validation. The groundwater
        results from different combinations of GRACE products (from
        three institutions, CSR, GFZ and JPL) and GLDAS LSMs (CLM, NOAH
        and VIC) are compared and evaluated with in-situ measurements.
        The intercomparison analysis shows that the solution obtained
        through removing averaged simulated SM and SWE of the three LSMs
        from the averaged GRACE-derived TWS of the three centers would
        be the most robust to reduce the noises, and increase the
        confidence consequently. Although discrepancy exists, the GRACE-
        GLDAS estimated groundwater variations generally agree with in-
        situ observations. For monthly scales, their correlation
        coefficient reaches 0.70 at 95\% confidence level with the RMSE
        of the differences of 2.6 cm. Two-tailed Mann-Kendall trend test
        results show that there is no significant groundwater gain or
        loss in this region over the study period. The GRACE time-
        variable field solutions and GLDAS simulations provide precise
        and reliable data sets in illustrating the regional groundwater
        storage variations, and the application will be meaningful and
        invaluable when applied to the data-poor regions.}",
          doi = {10.3390/rs70100686},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2015RemS....7..686X},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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