This folder contains all the files needed to run the Planetary Evolution Model (PEM).

# launch_pem.sh:
  Bash script file to launch the chained simulation of PEM and PCM runs.
  The user has to specify:
      (i)   n_mars_years, n_earth_years -> the number of Mars/Earth years to be simulated in total;
      (ii)  nPCM -> the number of PCM calls between PEM runs (usually nPCM=2);
      (iii) exePEM -> the name of executable file for the PEM run;
      (iv)  exeReshape -> the name of executable file for the data reshaping task with XIOS.
  The path to source the arch file should be adapted to the machine.

# exePCM.sh:
  Bash script file to run the PCM with a SLURM job. The name of the PCM executable file should be adapted. The header corresponds to the ADASTRA supercomputer and should be changed for other machines.

# run_PEM.def
  All the possible parameters to define a PEM run (read in "conf_pem.F90").
  It needs to be included in "run_PCM.def" with "INCLUDEDEF=run_PEM.def".

# obl_ecc_lsp.asc
  File describing orbital parameters for Mars from Laskar data. It contains the Earth year and the corresponding obliquity, eccentricity and Ls of perihelion.

# modify_startfi_orbit.sh:
  Bash script file to modify orbital parameters in the file "startfi.nc" (obliquity, eccentricity, Ls perihelion and possibly initial Ls). They should be consistent with Laskar's data in "obl_ecc_lsp.asc" to start a chained simulation at a specific date.

# concat_diagpem.sh:
  Bash script file to concatenate along the variable 'Time' all the "diagpem.nc" files of the PEM into one NetCDF file. 'Time' is re-indexed with the numbering of Martian years simulated by the PEM run.

Note:
  To run the chained simulation, be careful to have:
      (i)   the xml files for XIOS. There should be "iodef.xml", "context_lmdz_physics.xml", "file_def_physics_mars.xml" and "field_def_physics_mars.xml" which can be found in the planetary deftank folder. In "context_lmdz_physics.xml", the line for Xdiurnalave should be activated (enabled=".true.");
      (ii)  the usual def files to run the PCM. "run.def" should be renamed in "run_PCM.def";
      (iii  the starting files ("startfi.nc" and "start.nc"). The former can be modified by "modify_startfi_orbit.sh";
      (iv)  some optional files. For example, "diagfi.def" and "diagpem.def".