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    An Improved Scheme for Interpolating between an Atmospheric Model and Underlying Surface Grids near Orography and Ocean Boundaries

    Source: Monthly Weather Review:;2000:;volume( 128 ):;issue: 004::page 1177
    Author:
    Codron, Francis
    ,
    Vintzileos, Augustin
    ,
    Sadourny, Robert
    DOI: 10.1175/1520-0493(2000)128<1177:AISFIB>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: To take into account the strong nonlinearities of vertical fluxes due to small-scale heterogeneities of surface properties, more and more coupled general circulation models compute part of their atmospheric physical parameterizations, either the surface fluxes or the whole package, on the finer grid of their ocean or land model. A modification of a traditional interpolation scheme is presented to calculate the values of atmospheric variables over surface model grid points. In addition to the desirable properties of flux conservation and preservation of a constant field, the new scheme allows discontinuities in the interpolated fields at the surface model?s boundaries and orographic jumps, while remaining continuous elsewhere. It can also be tuned separately for each variable. The modified scheme is then evaluated using the circulation model of the Laboratoire de Météorologie Dynamique coupled to the Laboratoire d?Océanographie Dynamique et de Climatologie tropical Pacific Ocean model using the delocalized physics method. The results show a large improvement of heat and humidity fluxes near the focus region of the South American coast in the southeastern equatorial Pacific, and a subsequent westward propagation of significant cold SST anomalies.
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      An Improved Scheme for Interpolating between an Atmospheric Model and Underlying Surface Grids near Orography and Ocean Boundaries

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4204499
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    • Monthly Weather Review

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    contributor authorCodron, Francis
    contributor authorVintzileos, Augustin
    contributor authorSadourny, Robert
    date accessioned2017-06-09T16:13:00Z
    date available2017-06-09T16:13:00Z
    date copyright2000/04/01
    date issued2000
    identifier issn0027-0644
    identifier otherams-63491.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4204499
    description abstractTo take into account the strong nonlinearities of vertical fluxes due to small-scale heterogeneities of surface properties, more and more coupled general circulation models compute part of their atmospheric physical parameterizations, either the surface fluxes or the whole package, on the finer grid of their ocean or land model. A modification of a traditional interpolation scheme is presented to calculate the values of atmospheric variables over surface model grid points. In addition to the desirable properties of flux conservation and preservation of a constant field, the new scheme allows discontinuities in the interpolated fields at the surface model?s boundaries and orographic jumps, while remaining continuous elsewhere. It can also be tuned separately for each variable. The modified scheme is then evaluated using the circulation model of the Laboratoire de Météorologie Dynamique coupled to the Laboratoire d?Océanographie Dynamique et de Climatologie tropical Pacific Ocean model using the delocalized physics method. The results show a large improvement of heat and humidity fluxes near the focus region of the South American coast in the southeastern equatorial Pacific, and a subsequent westward propagation of significant cold SST anomalies.
    publisherAmerican Meteorological Society
    titleAn Improved Scheme for Interpolating between an Atmospheric Model and Underlying Surface Grids near Orography and Ocean Boundaries
    typeJournal Paper
    journal volume128
    journal issue4
    journal titleMonthly Weather Review
    identifier doi10.1175/1520-0493(2000)128<1177:AISFIB>2.0.CO;2
    journal fristpage1177
    journal lastpage1186
    treeMonthly Weather Review:;2000:;volume( 128 ):;issue: 004
    contenttypeFulltext
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