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The ARPEGE/ALADIN tech’ book : implications of LAM aspects on the global model code (Dec, 2007)
Article published on 11 December 2007

This paper was originally written by Mark Zagar, ever since updated by Claude Fischer with contributions by Gabor Radnoti, Martin Janousek and Alena Trojakova. The versions of December 2004 (al29t1), December 2006 (al32) are available.
The last version (al33) was prepared in December 2007 by Yann Seity.

It indeed aims at giving guidelines both for the pratical understanding and the detailed knowledge og the bi-Fourier limited area "patches" inside ARPEGE/IFS code.

This note focuses strongly on the features that are common to Arpege and Aladin in terms of functionality, but different in terms of actual coding.

Contents :
 duplicated routines
 physical (grid-point) space
 spectral transforms
 modules, namelists, interfaces
 spectral space computations
 non-hydrostatic model
 observation operators
 data distribution and parallelization

2004 version 201.2 kb / GZ

2006 version 493.2 kb / PostScript

Last version 496.8 kb / PostScript