The vertical discretization in LMDZ
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Révision de 3 décembre 2021 à 17:27 par Emillour (discussion | contributions) (Page créée avec « LMDZ model levels are hybrid sigma-pressure coordinates. There are many ways to define the vertical distribution of model layers via the def files. In practice the relate... »)
LMDZ model levels are hybrid sigma-pressure coordinates.
There are many ways to define the vertical distribution of model layers via the def files. In practice the related parameters are set in the vert.def (which is included in the run.def file). The master parameter being vert_sampling (string) which can be set to:
- vert_sampling=strato_custom : a highly customizable setup for stratospheric extensions
- vert_sampling=strato : a default for stratospheric extensions
- vert_sampling=sigma : make model levels (automatically generated) purely sigma levels
- vert_sampling=tropo : a default for tropospheric simulations
- vert_sampling = read : read ap() and bp(), the auxiliary hybrid coordinate coefficients, from file “hybrid.txt”
Friendly advice
Typically you don't need to mess with the vertical discretization, the provided defaults (see files in DefLists) should match your need. If you really want to dive into this, then you should check out routine libf/dyn3d_common/disvert.F90
03/12/2021
