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タイトルA stochastic-dynamic model for global atmospheric mass-field statistics
著者(英)Balgovind, R. C.; Kalnay, E.; Ghil, M.
著者所属(英)NASA Goddard Space Flight Center
発行日1981-12-01
言語eng
内容記述Global atmospheric mass field error correlations based on satellite observations and on numerical forecasts show strong and systematic latitude dependence. A model for the latitude dependent spatial correlation structure of mass field forecast errors is derived from dynamical considerations. Three methods of solution were tested. In the first method, the equation was solved by expansion in spherical harmonics, and the correlation function was computed analytically using the expansion coefficients. In the second method, the finite difference equivalent of the equation was solved using a fast poisson solver. The correlation function was computed using stratified sampling of the individual realizations. In the third method, a higher order equation was derived, and solved directly in finite differences by two successive applications of the fast poisson solver. The three methods were compared for accuracy and efficiency, and the third method was chosen as clearly superior.
NASA分類GEOPHYSICS
レポートNO82N25563
権利No Copyright
URIhttps://repository.exst.jaxa.jp/dspace/handle/a-is/413889


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