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Horizontal diffusion computations in cycle 46t1r1 of ARPEGE/IFS.

Tuesday 12 February 2019 by Karim Yessad
  Sommaire  

 Abstract:

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 different from the METEO-FRANCE one) is not described in detail. There is a main horizontal diffusion scheme, a sponge and a Rayleigh friction. An organigramme is provided.


 RESUME:

CETTE DOCUMENTATION RAPPELLE QUELQUES NOTIONS SUR LES SCHEMAS DE DIFFUSION HORIZONTALE, ET DECRIT COMMENT CES SCHEMAS SONT UTILISES ET CODES DANS ARPEGE/IFS ET SA VERSION A DOMAINE LIMITE. LA VERSION DE CES CODES UTILISEE AU CEP N’EST PAS DECRITE EN DETAIL, DANS LA MESURE OU ELLE DIFFERE UN PEU DE CE QUI EST UTILISE A METEO-FRANCE. IL Y A UN SCHEMA PRINCIPAL DE DIFFUSION HORIZONTALE, UNE EPONGE ET UNE FRICTION DE RAYLEIGH.


 Contents:

  • 1/ Introduction.
  • 2/ Formulation of the horizontal diffusion schemes.
  • 3/ Discretisation of the horizontal diffusion schemes.
  • 4/ Organigramme of the horizontal diffusion computations.
  • 5/ Some distributed memory features in spectral space.
  • 6/ Module and namelist variables.
  • 7/ References.

titre documents joints

Version cycle 46t1r1

12 February 2019
info document : PDF
303.6 kb

Version cycle 46t1

7 January 2019
info document : PDF
303.5 kb

Version cycle 46

10 April 2018
info document : PDF
303 kb

Version cycle 45

29 June 2017
info document : PDF
303.2 kb

Version cycle 44

7 March 2017
info document : PDF
303.1 kb

Version cycle 43

25 February 2016
info document : PDF
306.3 kb

Version cycle 42

7 July 2015
info document : PDF
305.9 kb

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