Projection of time-mean geopotential heights onto normal,hough modes |
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| Authors: | Dr J J Tribbia Dr R A Madden |
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| Institution: | (1) Present address: National Center for Atmospheric Research, P.O. Box 3000, 80307 Boulder, Colorado, U.S.A. |
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| Abstract: | Summary Bernhard Haurwitz discussed theoretically the roles of forced stationary and traveling free waves in the atmosphere. At least some of the prediction errors of the large-scale weather are thought to result from the improper partitioning of energy between the forced stationary fields and free traveling or normal modes of the forecast models. Here we project observed average fields for a given time of the year onto normal modes of a forecast model. It is important to have estimates of how the stationary, forced fields project onto these modes since the model must partition energy correctly between the stationary, forced fields and real, traveling modes in order to more accurately predict the evolution of the large scales.With 6 Figures |
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