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    A Fast Spherical Harmonics Transform for Global NWP and Climate Models

    Source: Monthly Weather Review:;2013:;volume( 141 ):;issue: 010::page 3450
    Author:
    Wedi, Nils P.
    ,
    Hamrud, Mats
    ,
    Mozdzynski, George
    DOI: 10.1175/MWR-D-13-00016.1
    Publisher: American Meteorological Society
    Abstract: ery high-resolution spectral transform models are believed to become prohibitively expensive because of the relative increase in computational cost of the Legendre transforms compared to the gridpoint computations. This article describes the implementation of a practical fast spherical harmonics transform into the Integrated Forecast System (IFS) at ECMWF. Details of the accuracy of the computations, of the parallelization, and memory use are discussed. Results are presented that demonstrate the cost effectiveness and accuracy of the fast spherical harmonics transform, successfully mitigating the concern about the disproportionally growing computational cost. Using the new transforms, the first T7999 global weather forecast (equivalent to ≈2.5-km horizontal grid size) using a spectral transform model has been produced.
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      A Fast Spherical Harmonics Transform for Global NWP and Climate Models

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4230132
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    • Monthly Weather Review

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    contributor authorWedi, Nils P.
    contributor authorHamrud, Mats
    contributor authorMozdzynski, George
    date accessioned2017-06-09T17:30:56Z
    date available2017-06-09T17:30:56Z
    date copyright2013/10/01
    date issued2013
    identifier issn0027-0644
    identifier otherams-86561.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4230132
    description abstractery high-resolution spectral transform models are believed to become prohibitively expensive because of the relative increase in computational cost of the Legendre transforms compared to the gridpoint computations. This article describes the implementation of a practical fast spherical harmonics transform into the Integrated Forecast System (IFS) at ECMWF. Details of the accuracy of the computations, of the parallelization, and memory use are discussed. Results are presented that demonstrate the cost effectiveness and accuracy of the fast spherical harmonics transform, successfully mitigating the concern about the disproportionally growing computational cost. Using the new transforms, the first T7999 global weather forecast (equivalent to ≈2.5-km horizontal grid size) using a spectral transform model has been produced.
    publisherAmerican Meteorological Society
    titleA Fast Spherical Harmonics Transform for Global NWP and Climate Models
    typeJournal Paper
    journal volume141
    journal issue10
    journal titleMonthly Weather Review
    identifier doi10.1175/MWR-D-13-00016.1
    journal fristpage3450
    journal lastpage3461
    treeMonthly Weather Review:;2013:;volume( 141 ):;issue: 010
    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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