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    The Interplay between Transpiration and Runoff Formulations in Land Surface Schemes Used with Atmospheric Models

    Source: Journal of Climate:;1997:;volume( 010 ):;issue: 007::page 1578
    Author:
    Koster, Randal D.
    ,
    Milly, P. C. D.
    DOI: 10.1175/1520-0442(1997)010<1578:TIBTAR>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The Project for Intercomparison of Land-surface Parameterization Schemes (PILPS) has shown that different land surface models (LSMs) driven by the same meteorological forcing can produce markedly different surface energy and water budgets, even when certain critical aspects of the LSMs (vegetation cover, albedo, turbulent drag coefficient, and snowcover) are carefully controlled. To help explain these differences, the authors devised a monthly water balance model that successfully reproduces the annual and seasonal water balances of the different PILPS schemes. Analysis of this model leads to the identification of two quantities that characterize an LSM?s formulation of soil water balance dynamics: 1) the efficiency of the soil?s evaporation sink integrated over the active soil moisture range, and 2) the fraction of this range over which runoff is generated. Regardless of the LSM?s complexity, the combination of these two derived parameters with rates of interception loss, potential evaporation, and precipitation provides a reasonable estimate for the LSM?s simulated annual water balance. The two derived parameters shed light on how evaporation and runoff formulations interact in an LSM, and the analysis as a whole underscores the need for compatibility in these formulations.
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      The Interplay between Transpiration and Runoff Formulations in Land Surface Schemes Used with Atmospheric Models

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4187323
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    contributor authorKoster, Randal D.
    contributor authorMilly, P. C. D.
    date accessioned2017-06-09T15:35:38Z
    date available2017-06-09T15:35:38Z
    date copyright1997/07/01
    date issued1997
    identifier issn0894-8755
    identifier otherams-4803.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4187323
    description abstractThe Project for Intercomparison of Land-surface Parameterization Schemes (PILPS) has shown that different land surface models (LSMs) driven by the same meteorological forcing can produce markedly different surface energy and water budgets, even when certain critical aspects of the LSMs (vegetation cover, albedo, turbulent drag coefficient, and snowcover) are carefully controlled. To help explain these differences, the authors devised a monthly water balance model that successfully reproduces the annual and seasonal water balances of the different PILPS schemes. Analysis of this model leads to the identification of two quantities that characterize an LSM?s formulation of soil water balance dynamics: 1) the efficiency of the soil?s evaporation sink integrated over the active soil moisture range, and 2) the fraction of this range over which runoff is generated. Regardless of the LSM?s complexity, the combination of these two derived parameters with rates of interception loss, potential evaporation, and precipitation provides a reasonable estimate for the LSM?s simulated annual water balance. The two derived parameters shed light on how evaporation and runoff formulations interact in an LSM, and the analysis as a whole underscores the need for compatibility in these formulations.
    publisherAmerican Meteorological Society
    titleThe Interplay between Transpiration and Runoff Formulations in Land Surface Schemes Used with Atmospheric Models
    typeJournal Paper
    journal volume10
    journal issue7
    journal titleJournal of Climate
    identifier doi10.1175/1520-0442(1997)010<1578:TIBTAR>2.0.CO;2
    journal fristpage1578
    journal lastpage1591
    treeJournal of Climate:;1997:;volume( 010 ):;issue: 007
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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