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Digital filtering initialisation in the cycle 46t1r1 of ARPEGE/IFS. (Dynamics)
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. (Dynamics)
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. (Dynamics)
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. (Dynamics)
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. (Dynamics)
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. (Dynamics)
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 (...)
Modification of ARPEGE necessary to include the EGA-SA, "case (ii)" (Dynamics)
Tuesday 27 May 2014
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This memo is a specific application of "Continuity equation for non-spherical geometries..." for the case of a spherical planet with meridionally varying gravity but shallow-atmosphere approximation.
This specific case may be implemented with very minimal changes to the existing code, while allowing to assess the magnitude of gravity errors of the spherical approximation.
Continuity equation for non-spherical geometries in mass-coordinates (Dynamics)
Tuesday 27 May 2014
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Non-Hydrostatic Model versioned documentations (2013) (Dynamics)
Thursday 31 January 2013
In this page you will find the official scientific documentation of the Aladin NH model (authors : Pierre Bénard and Jan Masek).
The old versions of the documentation are archived (version 1 1995-2003, version 2.0.0 of December 2003, version 2.1 of December 2004, version 3.0 of July 2011), and (...)
"A and B" : Design of the hybrid vertical coordinate (eta), 2008 (Dynamics)
Wednesday 16 December 2009
These documents describe a new method for the setting the vertical levels in the "A and B" namelists. These describe a more intuitive method to define the hybrid pressure terrain-following coordinate in ARPEGE/ALADIN/AROME/...
A separate file contains the external FORTRAN program and Linux (...)
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