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Detection of extreme hydrological droughts in the poyang lake basin during 2021–2022 using GNSS-derived daily terrestrial water storage anomalies

Peng, Yujie, Chen, Gang, Chao, Nengfang, Wang, Zhengtao, Wu, Tangting, and Luo, Xinyu, 2024. Detection of extreme hydrological droughts in the poyang lake basin during 2021–2022 using GNSS-derived daily terrestrial water storage anomalies. Science of the Total Environment, 919:170875, doi:10.1016/j.scitotenv.2024.170875.

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@ARTICLE{2024ScTEn.91970875P,
       author = {{Peng}, Yujie and {Chen}, Gang and {Chao}, Nengfang and {Wang}, Zhengtao and {Wu}, Tangting and {Luo}, Xinyu},
        title = "{Detection of extreme hydrological droughts in the poyang lake basin during 2021{\textendash}2022 using GNSS-derived daily terrestrial water storage anomalies}",
      journal = {Science of the Total Environment},
     keywords = {GNSS, Surface vertical displacement, Terrestrial water storage anomalies, Drought, Poyang Lake basin},
         year = 2024,
        month = apr,
       volume = {919},
          eid = {170875},
        pages = {170875},
     abstract = "{Poyang Lake is the largest freshwater lake in China, serving as a
        natural reservoir and playing a paramount role in climate
        regulation, ecological environment, and water resource
        management. However, in recent years, Poyang Lake has approached
        desiccation multiple times, with severe droughts becoming
        increasingly common. Consequently, precise quantification and
        analysis of the terrestrial water storage anomalies (TWSA) and
        drought characteristics of the Poyang Lake basin (PLB) are of
        profound scientific and practical significance. This paper, for
        the first time, utilizes data for the period
        2021{\textendash}2022 from 77 newly-established GNSS observation
        stations in the PLB to precisely determine its vertical crustal
        displacement, invert daily and monthly TWSA, and investigate
        extreme hydrological drought. The results reveal the following:
        1) The annual amplitude range of vertical surface displacements
        at GNSS stations in the Poyang Lake basin is from 7 to 14 mm,
        with the most substantial seasonal vertical displacements
        occurring during the months of June and July; 2) monthly GNSS-
        TWSA maintains a commendable consistency with TWSA data obtained
        from the Gravity Recovery and Climate Experiment (GRACE), the
        Global Land Data Assimilation System (GLDAS), and precipitation,
        with correlation coefficients of 0.67, 0.55, and 0.62,
        respectively; 3) at daily scale, the GNSS-derived Drought
        Severity Index (GNSS-DSI) accurately recorded the severity and
        intensity of eight drought events in the PLB during
        2021{\textendash}2022, in particular the period of extensive
        drought between October 2021 and February 2022, when drought
        intensity reaching a notable 1.03, which is classified as an
        extreme and prolonged drought event. Additionally, at local
        temporal scales, daily GNSS-DSI exhibits heightened sensitivity
        to drought signals. This study provides novel technological
        tools and datasets for multi-source satellite-based drought
        monitoring in the PLB.}",
          doi = {10.1016/j.scitotenv.2024.170875},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2024ScTEn.91970875P},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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