A fast model for mean and turbulent wind characteristics over terrain with mixed surface roughness

P. Astrup, T. Mikkelsen, N.O. Jensen

    Research output: Contribution to journalConference articleResearch

    Abstract

    The real-time near-range atmospheric model chain in RODOS already includes the fast spectral LINCOM code, which was originally developed by Rise for modelling the mean wind fields over hilly, but otherwise homogeneous, terrain. Its output is used as a wind field driver for the dispersion model RIMPUFF also included in the near-range model chain. An extension of the LINCOM wind model is described, which enables it also to respond to the effects of a heterogeneous or non-constant surface roughness distribution. This is of importance in the RODOS framework for: (1) prediction of the time of arrival of radioactive clouds traversing, for instance, a land/water/land surface, and (2) for calculation of the turbulent shear stress, and thereby the scaling parameters, over mixed terrain.
    Original languageEnglish
    JournalRadiation Protection Dosimetry
    Volume73
    Issue number1-4
    Pages (from-to)257-260
    ISSN0144-8420
    Publication statusPublished - 1997
    EventInternational workshop on real time computing of the environmental consequences of an accidental release from a nuclear installation - Aronsborg, Sweden
    Duration: 6 Oct 199611 Oct 1996
    Conference number: 4

    Conference

    ConferenceInternational workshop on real time computing of the environmental consequences of an accidental release from a nuclear installation
    Number4
    CountrySweden
    CityAronsborg
    Period06/10/199611/10/1996

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