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    Development of a Land Surface Model. Part II: Data Assimilation

    Source: Journal of Applied Meteorology:;2003:;volume( 042 ):;issue: 012::page 1811
    Author:
    Pleim, Jonathan E.
    ,
    Xiu, Aijun
    DOI: 10.1175/1520-0450(2003)042<1811:DOALSM>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Part I described a land surface model, its implementation in the fifth-generation Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model (MM5), and some model evaluation results. Part II describes the indirect soil moisture data assimilation scheme. As described in Part I, the land surface model includes explicit soil moisture, which is based on the Interactions between Soil, Biosphere, and Atmosphere (ISBA) model, and three pathways for evaporation: soil evaporation, evaporation from the wet canopy, and vegetative transpiration. The data assimilation scheme presented here also follows similar work on data assimilation for ISBA and uses model biases of the 2-m air temperature and humidity against observed analyses to nudge soil moisture. An important difference from the ISBA schemes is that the nudging strengths are computed from model parameters such as solar radiation, temperature, leaf area, vegetation coverage, and aerodynamic resistance rather than from statistically derived functions. The rationale is that nudging soil moisture according to model biases in air temperature and humidity should depend on the degree of coupling across the land?atmosphere interface. Thus, nudging strengths are designed to reflect the potential for the surface and root-zone soil moisture to affect near-surface air temperature and humidity. Model test cases are used to examine relationships between the nudging strengths and modeled physical parameters and then to demonstrate the effects of the nudging scheme on model results.
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      Development of a Land Surface Model. Part II: Data Assimilation

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4148760
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    contributor authorPleim, Jonathan E.
    contributor authorXiu, Aijun
    date accessioned2017-06-09T14:09:00Z
    date available2017-06-09T14:09:00Z
    date copyright2003/12/01
    date issued2003
    identifier issn0894-8763
    identifier otherams-13322.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4148760
    description abstractPart I described a land surface model, its implementation in the fifth-generation Pennsylvania State University?National Center for Atmospheric Research Mesoscale Model (MM5), and some model evaluation results. Part II describes the indirect soil moisture data assimilation scheme. As described in Part I, the land surface model includes explicit soil moisture, which is based on the Interactions between Soil, Biosphere, and Atmosphere (ISBA) model, and three pathways for evaporation: soil evaporation, evaporation from the wet canopy, and vegetative transpiration. The data assimilation scheme presented here also follows similar work on data assimilation for ISBA and uses model biases of the 2-m air temperature and humidity against observed analyses to nudge soil moisture. An important difference from the ISBA schemes is that the nudging strengths are computed from model parameters such as solar radiation, temperature, leaf area, vegetation coverage, and aerodynamic resistance rather than from statistically derived functions. The rationale is that nudging soil moisture according to model biases in air temperature and humidity should depend on the degree of coupling across the land?atmosphere interface. Thus, nudging strengths are designed to reflect the potential for the surface and root-zone soil moisture to affect near-surface air temperature and humidity. Model test cases are used to examine relationships between the nudging strengths and modeled physical parameters and then to demonstrate the effects of the nudging scheme on model results.
    publisherAmerican Meteorological Society
    titleDevelopment of a Land Surface Model. Part II: Data Assimilation
    typeJournal Paper
    journal volume42
    journal issue12
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(2003)042<1811:DOALSM>2.0.CO;2
    journal fristpage1811
    journal lastpage1822
    treeJournal of Applied Meteorology:;2003:;volume( 042 ):;issue: 012
    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
    yabeshDSpacePersian