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The effect of compact implicit differencing in a baroclinic primitive equations model (1984)

Cohn, S. E. ; Augenbaum, J. M. ; Marchesin, D.

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Publication Date: 2011-08-18

Description: In an effort to improve forecast accuracy, the horizontal accuracy of gridpoint forecast models at a number of numerical weather prediction (NWP) centers was increased from second order to fourth order. The current GLAS model uses second-order explicit finite-difference formulas in the vertical and fourth-order explicit finite-difference formulas in the horizontal. Experiments are described which indicate the increased forecast accuracy gained by use of compact fourth-order finite differences in a simple baroclinic model. Tables show an increase in forecast accuracy by a factor of 100-150 by use of fourth-order instead of second-order vertical discretization.

Keywords: METEOROLOGY AND CLIMATOLOGY

Type: Res. Rev., 1983; p 87-89

Format: text

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