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Numerical filters (presentation, 2002)
Article published on June 2002
last modification on 21 June 2007

Presentation of Piet Termonia during the ALATNET training course on Numerical Analysis in Kranjska Gora, 29-31 May 2002.

Generalities :
 why do we need filters in the first place ?
 set the stage : notions, spectral, types
 NWP: discretization and truncation
 increasing the efficiency

The specific LAM coupling problem seen as a filter
 spurious reflections
 flow relaxation : Davies scheme
 implementation in ALADIN

Generalities 469 kb / PostScript

LAM coupling as a filter 722.3 kb / PostScript