Specific documentation
Editorial
The purpose of this site is to give an easy access to the numerous and various documentations available around ARPEGE/ALADIN/AROME
- specific documentation (grouped by topics)
- specific presentations and full lectures given during training courses
- other presentations (grouped by topics)
- Newsletters
- Some targered articles for Newcomers to ALADIN or New Phasers.
The home page of this site presents the last articles and news item published (in reverse chronological order). Many tools (on top and bottom menus) should made your reading easier :
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Most recent articles
Most recent articles
Eradication of arrays bounds violations in IFS/ARPEGE/AROME, August 2019
Thursday 26 September 2019
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In this note, Ryad explains the origins of the arrays bounds violations issue and proposes a solution to eradicate them. This solution has been implemented in the code (CY47T0).
Cycling in the IFS-ARPEGE-AROME code: a GIT view, April 2019
Wednesday 17 April 2019
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The diagram prepared by Alexandre Mary illustrates the evolution of cycles in the common code IFS-ARPEGE-AROME in the GIT repository of Meteo-France.
Main features to remember: all the main cycles (e.g. CY43T2, CY46) are tags on the master branch. a T cycle (e.g. CY47T1) is constructed as a (...)
CFU (cumulated fluxes) and XFU (instantaneous fluxes) in the cycle 46t1r1 of ARPEGE/IFS.
Tuesday 12 February 2019
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Sommaire Abstract RESUME Contents
This documentation describes some diagnostics done on the physical fluxes: CFU (cumulated fluxes) and XFU (instantaneous fluxes). Some algorithmic aspects and technical aspects (organigramme for example) are described.
CETTE (...)
Digital filtering initialisation in the cycle 46t1r1 of ARPEGE/IFS.
Tuesday 12 February 2019
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Sommaire Abstract RESUME Contents
This documentation describes the digital filtering initialisation (DFI) and its implementation in ARPEGE/IFS. Some theoretical aspects are recalled. The way of implementing the DFI in ARPEGE/IFS is then described, and an (...)
Semi-Implicit spectral computations and predictor-corrector schemes in the cycle 46t1r1 of ARPEGE/IFS.
Tuesday 12 February 2019
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Sommaire Abstract RESUME Contents
This documentation describes two types of schemes allowing to stabilize the numerical discretizations of the models: the semi-implicit scheme and the iterative centred-implicit scheme (sometimes called predictor-corrector (...)
Semi-Lagrangian computations in the cycle 46t1r1 of ARPEGE/IFS.
Tuesday 12 February 2019
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Sommaire Abstract RESUME Contents
The general purpose of this documentation is to describe the set of equations used, and also the way to integrate the dynamics of the model with the semi-Lagrangian method currently implemented in ARPEGE/IFS. The following (...)
Integration of the model equations, and eulerian dynamics, in the cycle 46t1r1 of ARPEGE/IFS.
Tuesday 12 February 2019
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Sommaire Abstract RESUME Contents Appendices
This documentation can be seen as a long introduction to modeling. The general purpose of this documentation is to describe the set of equations used, and also the way to integrate the dynamics of the model. Two (...)
Horizontal diffusion computations in cycle 46t1r1 of ARPEGE/IFS.
Tuesday 12 February 2019
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Sommaire Abstract RESUME Contents
This documentation recalls some basics about horizontal diffusion schemes, and describes how they are implemented in ARPEGE/IFS and its LAM (limited area model) counterpart. The ECMWF way of implementing them (which is slightly (...)
Spectral transforms in the cycle 46t1r1 of ARPEGE/IFS.
Tuesday 12 February 2019
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Sommaire Abstract RESUME Contents Appendices
ARPEGE/IFS, ALADIN and AROME are spectral models, so this documentation has for purpose to describe the spectral transforms done. The present note has for aim to give a brief summary of the spectral method (how to (...)
Basics about ARPEGE/IFS, ALADIN and AROME in the cycle 46t1r1 of ARPEGE/IFS.
Tuesday 12 February 2019
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Sommaire Abstract RESUME Contents
This documentation has the aim to give a general overview of the ARPEGE/IFS, ALADIN and AROME models, for beginners or for someone which knows some specific points but has no general overview of the whole models. It can be seen (...)
