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Model structure

The IFS atmospheric model formulation is based on a set of basic equations.  These are either:

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Fig2.1.1-2: A schematic pie-chart showing approximate proportions of computer processing time during execution of an atmospheric model forecast based on T799 (25km resolution on regular grid) and 91 levels.  The current resolution for ENS is Tco1279 (9km resolution) and 137 levels.   Parameterised physical processes consume about 30% of computer processing time.  Computations in grid point space and spectral space together take about 20% of computer processing time while rather more time (~27%) is taken in transposing data from one space to the other.



(FUG Associated with Cy49r1)