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  • METEOROLOGY AND CLIMATOLOGY  (2)
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  • METEOROLOGY AND CLIMATOLOGY  (2)
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  • 1
    Publication Date: 2011-08-17
    Description: A dynamical relaxation technique for updating prediction models is analyzed with the help of the linear and nonlinear barotropic primitive equations. It is assumed that a complete four-dimensional time history of some prescribed subset of the meteorological variables is known. The rate of adaptation of the flow variables toward the true state is determined for a linearized f-model, and for mid-latitude and equatorial beta-plane models. The results of the analysis are corroborated by numerical experiments with the nonlinear shallow-water equations.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Royal Meteorological Society; vol. 103
    Format: text
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  • 2
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    In:  Other Sources
    Publication Date: 2011-08-16
    Description: A method is proposed for treating the lateral boundaries of a limited-area weather prediction model. The method involves the relaxation of the interior flow in the vicinity of the boundary to the external fully prescribed flow. Analytical and numerical results obtained with a linearized multilevel model confirm the effectiveness of this computationally effective method. The method is shown to give an adequate representation of outgoing gravity waves with and without an ambient shear flow and to allow the substantially undistorted transmission of geostrophically balanced flow out of the interior of the limited domain.
    Keywords: METEOROLOGY AND CLIMATOLOGY
    Type: Royal Meteorological Society; vol. 102
    Format: text
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