YaBeSH Engineering and Technology Library

    • Journals
    • PaperQuest
    • YSE Standards
    • YaBeSH
    • Login
    View Item 
    •   YE&T Library
    • AMS
    • Journal of Hydrometeorology
    • View Item
    •   YE&T Library
    • AMS
    • Journal of Hydrometeorology
    • View Item
    • All Fields
    • Source Title
    • Year
    • Publisher
    • Title
    • Subject
    • Author
    • DOI
    • ISBN
    Advanced Search
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Archive

    Weak Land–Atmosphere Coupling Strength in HadAM3: The Role of Soil Moisture Variability

    Source: Journal of Hydrometeorology:;2005:;Volume( 006 ):;issue: 005::page 670
    Author:
    Lawrence, David M.
    ,
    Slingo, Julia M.
    DOI: 10.1175/JHM445.1
    Publisher: American Meteorological Society
    Abstract: A recent model intercomparison, the Global Land?Atmosphere Coupling Experiment (GLACE), showed that there is a wide range of land?atmosphere coupling strengths, or the degree that soil moisture affects the generation of precipitation, amongst current atmospheric general circulation models (AGCMs). Coupling strength in the Hadley Centre atmosphere model (HadAM3) is among the weakest of all AGCMs considered in GLACE. Reasons for the weak HadAM3 coupling strength are sought here. In particular, the impact of pervasive saturated soil conditions and low soil moisture variability on coupling strength is assessed. It is found that when the soil model is modified to reduce the occurrence of soil moisture saturation and to encourage soil moisture variability, the soil moisture?precipitation feedback remains weak, even though the relationship between soil moisture and evaporation is strengthened. Composites of the diurnal cycle, constructed relative to soil moisture, indicate that the model can simulate key differences in boundary layer development over wet versus dry soils. In particular, the influence of wet or dry soil on the diurnal cycles of Bowen ratio, boundary layer height, and total heat flux are largely consistent with the observed influence of soil moisture on these properties. However, despite what appears to be successful simulation of these key aspects of the indirect soil moisture?precipitation feedback, the model does not capture observed differences for wet and dry soils in the daily accumulation of boundary layer moist static energy, a crucial feature of the feedback mechanism.
    • Download: (1.789Mb)
    • Show Full MetaData Hide Full MetaData
    • Item Order
    • Go To Publisher
    • Price: 5000 Rial
    • Statistics

      Weak Land–Atmosphere Coupling Strength in HadAM3: The Role of Soil Moisture Variability

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4224457
    Collections
    • Journal of Hydrometeorology

    Show full item record

    contributor authorLawrence, David M.
    contributor authorSlingo, Julia M.
    date accessioned2017-06-09T17:13:48Z
    date available2017-06-09T17:13:48Z
    date copyright2005/10/01
    date issued2005
    identifier issn1525-755X
    identifier otherams-81452.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4224457
    description abstractA recent model intercomparison, the Global Land?Atmosphere Coupling Experiment (GLACE), showed that there is a wide range of land?atmosphere coupling strengths, or the degree that soil moisture affects the generation of precipitation, amongst current atmospheric general circulation models (AGCMs). Coupling strength in the Hadley Centre atmosphere model (HadAM3) is among the weakest of all AGCMs considered in GLACE. Reasons for the weak HadAM3 coupling strength are sought here. In particular, the impact of pervasive saturated soil conditions and low soil moisture variability on coupling strength is assessed. It is found that when the soil model is modified to reduce the occurrence of soil moisture saturation and to encourage soil moisture variability, the soil moisture?precipitation feedback remains weak, even though the relationship between soil moisture and evaporation is strengthened. Composites of the diurnal cycle, constructed relative to soil moisture, indicate that the model can simulate key differences in boundary layer development over wet versus dry soils. In particular, the influence of wet or dry soil on the diurnal cycles of Bowen ratio, boundary layer height, and total heat flux are largely consistent with the observed influence of soil moisture on these properties. However, despite what appears to be successful simulation of these key aspects of the indirect soil moisture?precipitation feedback, the model does not capture observed differences for wet and dry soils in the daily accumulation of boundary layer moist static energy, a crucial feature of the feedback mechanism.
    publisherAmerican Meteorological Society
    titleWeak Land–Atmosphere Coupling Strength in HadAM3: The Role of Soil Moisture Variability
    typeJournal Paper
    journal volume6
    journal issue5
    journal titleJournal of Hydrometeorology
    identifier doi10.1175/JHM445.1
    journal fristpage670
    journal lastpage680
    treeJournal of Hydrometeorology:;2005:;Volume( 006 ):;issue: 005
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian