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    Assimilation of Gridded GRACE Terrestrial Water Storage Estimates in the North American Land Data Assimilation System

    Source: Journal of Hydrometeorology:;2016:;Volume( 017 ):;issue: 007::page 1951
    Author:
    Kumar, Sujay V.
    ,
    Zaitchik, Benjamin F.
    ,
    Peters-Lidard, Christa D.
    ,
    Rodell, Matthew
    ,
    Reichle, Rolf
    ,
    Li, Bailing
    ,
    Jasinski, Michael
    ,
    Mocko, David
    ,
    Getirana, Augusto
    ,
    De Lannoy, Gabrielle
    ,
    Cosh, Michael H.
    ,
    Hain, Christopher R.
    ,
    Anderson, Martha
    ,
    Arsenault, Kristi R.
    ,
    Xia, Youlong
    ,
    Ek, Michael
    DOI: 10.1175/JHM-D-15-0157.1
    Publisher: American Meteorological Society
    Abstract: he objective of the North American Land Data Assimilation System (NLDAS) is to provide best-available estimates of near-surface meteorological conditions and soil hydrological status for the continental United States. To support the ongoing efforts to develop data assimilation (DA) capabilities for NLDAS, the results of Gravity Recovery and Climate Experiment (GRACE) DA implemented in a manner consistent with NLDAS development are presented. Following previous work, GRACE terrestrial water storage (TWS) anomaly estimates are assimilated into the NASA Catchment land surface model using an ensemble smoother. In contrast to many earlier GRACE DA studies, a gridded GRACE TWS product is assimilated, spatially distributed GRACE error estimates are accounted for, and the impact that GRACE scaling factors have on assimilation is evaluated. Comparisons with quality-controlled in situ observations indicate that GRACE DA has a positive impact on the simulation of unconfined groundwater variability across the majority of the eastern United States and on the simulation of surface and root zone soil moisture across the country. Smaller improvements are seen in the simulation of snow depth, and the impact of GRACE DA on simulated river discharge and evapotranspiration is regionally variable. The use of GRACE scaling factors during assimilation improved DA results in the western United States but led to small degradations in the eastern United States. The study also found comparable performance between the use of gridded and basin-averaged GRACE observations in assimilation. Finally, the evaluations presented in the paper indicate that GRACE DA can be helpful in improving the representation of droughts.
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      Assimilation of Gridded GRACE Terrestrial Water Storage Estimates in the North American Land Data Assimilation System

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4225420
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    • Journal of Hydrometeorology

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    contributor authorKumar, Sujay V.
    contributor authorZaitchik, Benjamin F.
    contributor authorPeters-Lidard, Christa D.
    contributor authorRodell, Matthew
    contributor authorReichle, Rolf
    contributor authorLi, Bailing
    contributor authorJasinski, Michael
    contributor authorMocko, David
    contributor authorGetirana, Augusto
    contributor authorDe Lannoy, Gabrielle
    contributor authorCosh, Michael H.
    contributor authorHain, Christopher R.
    contributor authorAnderson, Martha
    contributor authorArsenault, Kristi R.
    contributor authorXia, Youlong
    contributor authorEk, Michael
    date accessioned2017-06-09T17:16:47Z
    date available2017-06-09T17:16:47Z
    date copyright2016/07/01
    date issued2016
    identifier issn1525-755X
    identifier otherams-82319.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4225420
    description abstracthe objective of the North American Land Data Assimilation System (NLDAS) is to provide best-available estimates of near-surface meteorological conditions and soil hydrological status for the continental United States. To support the ongoing efforts to develop data assimilation (DA) capabilities for NLDAS, the results of Gravity Recovery and Climate Experiment (GRACE) DA implemented in a manner consistent with NLDAS development are presented. Following previous work, GRACE terrestrial water storage (TWS) anomaly estimates are assimilated into the NASA Catchment land surface model using an ensemble smoother. In contrast to many earlier GRACE DA studies, a gridded GRACE TWS product is assimilated, spatially distributed GRACE error estimates are accounted for, and the impact that GRACE scaling factors have on assimilation is evaluated. Comparisons with quality-controlled in situ observations indicate that GRACE DA has a positive impact on the simulation of unconfined groundwater variability across the majority of the eastern United States and on the simulation of surface and root zone soil moisture across the country. Smaller improvements are seen in the simulation of snow depth, and the impact of GRACE DA on simulated river discharge and evapotranspiration is regionally variable. The use of GRACE scaling factors during assimilation improved DA results in the western United States but led to small degradations in the eastern United States. The study also found comparable performance between the use of gridded and basin-averaged GRACE observations in assimilation. Finally, the evaluations presented in the paper indicate that GRACE DA can be helpful in improving the representation of droughts.
    publisherAmerican Meteorological Society
    titleAssimilation of Gridded GRACE Terrestrial Water Storage Estimates in the North American Land Data Assimilation System
    typeJournal Paper
    journal volume17
    journal issue7
    journal titleJournal of Hydrometeorology
    identifier doi10.1175/JHM-D-15-0157.1
    journal fristpage1951
    journal lastpage1972
    treeJournal of Hydrometeorology:;2016:;Volume( 017 ):;issue: 007
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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