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

Tuesday 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
set-up
modules, namelists, interfaces
spectral space computations
non-hydrostatic model
observation operators
input/output
data distribution and parallelization