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Minimizations in the cycle 39 of ARPEGE/IFS (November 2012)

Wednesday 28 November 2012 par Karim Yessad

Table of contents

Abstract:

This documentation describes the minimizations done in ARPEGE/IFS, for example in the 3DVAR and 4DVAR assimilation. First some algorithmic aspects are recalled about minimizers and solving of linear algebra systems. There is then a specific description of the minimizers employed in ARPEGE/IFS (M1QN3, N1CG1 and CONGRAD) and of the applications using these minimizers.

Introduction.
Some algorithms of minimization and of linear systems solving.
Available minimizers in the ARPEGE/IFS and XLA libraries: description and organigrams.
Configurations of use of minimizations, and simulators.
Specific variables of the "ARPEGE" library.
Modules-routines of the "ARPEGE" and "XLA" library.
Bibliography.