LMDZ Setup

LMDZ_Setup

It is a set of scripts that allows a light automatic setup of LMDZ long chained climate simulations, including the installation of the model itself.

LMDZ_Setup can only be used on Jean-Zay computer at Idris so far. Coming VERY soon (summer 2024) : extension to other computing centers ("spirit", adastra) and Linux PCs

Documentation (in French): LMDZ_Setup_HowTo

To extract LMDZ_Setup :

a/ Recommended : extraction from svn repository :

   svn co https://svn.lmd.jussieu.fr/LMDZ/BOL/LMDZ_Setup

b/ Download of the "tar" archive :

   wget https://lmdz.lmd.jussieu.fr/pub/Training/LMDZ_Setup.tar

c/ For those used for a long time with the ancient name "tutorial_prod.tar" : a link with the old name "tutorial_prod.tar" still exists, but pointing to LMDZ_Setup.tar :

   wget https://lmdz.lmd.jussieu.fr/pub/Training/tutorial_prod.tar

(Text extracted from LMDZ_Setup/README0_HowTo):

LMDZ_Setup consists in running LMDZ coupled to Orchidee for land surface (optional), but with imposed sea surface temperature.

The basic default configuration makes use of the IPSL-CM6A grid configuration and tuning, and runs a multi annual simulation on "climatological" amip sea surface temperature (with a mean annual cycle) using a calendar with 360 days.

Optionally : the configuration includes the ability to use interannually varying SST and to activate "nudgning" by reanalysis. In both cases, the calendar is then a real one. When nudging is activated, the simulation must be run on a monthly basis, while otherwise, it can be either monthly or yearly.

Since LMDZ_Setup automatically generates its own initial files, it can be run with zoom configurations by only changing the number of grid points ("resol" in main.sh) and the DEF/gcm.def file (see bellow).

Aerosols can be read for the year 2000 (weighted average over 1999-2001 cf Lurton et al 2020), and instantaneous forcing with respect to 1850 can be computed as well.

LMDZ_Setup can also run LMDZ coupled with the SPLA model(SimPLe Aerosol, activated with option aerosols=spla in setup.sh). Emissions of dust and sea salt are then computed interactively. For the time being, SPLA-specific input files (anthropic aerosol emissions)are only available on the grid zoomed over N Africa used by J. Escribano in his PhD thesis, and by B. Diallo and H. Senghor in subsequent work on N-African dust (file DEF/gcm.def_zNAfrica_BiJe).

A configuration with isotopes is also available since 2023-04.