Full and selective initialization in spectral atmospheric models

Details Full and selective initialization in spectral atmospheric models Full and selective initialization in spectral atmospheric models

Sep 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988rpsct.......11i&link_type=abstract

In its JPRS Report: Science and Technology. Science and Technology. USSR: Earth Sciences p 11 (SEE N89-17907 10-42) Transl. into

Physics

Atmospheric Models, Gravity Waves, Planetary Waves, Spectrum Analysis, Asymptotic Series, Boundary Value Problems, Oscillations, Series Expansion

Scientific paper

In atmospheric spectral models, the eigenvalues of the spectrum of a linear model are broken down into two groups corresponding to the frequencies of gravity waves and Rossby waves. The initialization problem is solved as a problem in the choice of the initial field in such a way that the asymptotic expansion of the solution of the corresponding spectral model of the atmosphere does not contain rapidly oscillating terms. It is shown that in any finite time interval, initialization is always possible and rapid oscillations can be suppressed in any first N terms of an asymptotic expansion. Initialization in an infinite time interval and selective initialization are also discussed.

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