Frequently Asked Questions

Script problem
Problem of configuration where mychimere.sh.example is removed
I want to configure my mychimere.sh file but it is deleted when trying to configure the model
Solution:
  • You have to specify a name that is NOT mychimere.sh.example, otherwise it just erases this template file.
  • The typical command line is:
    ./config.sh mychimere.sh.myconfig 
    
  • You can download again the mychimere.sh.example here.


Compilation problem
The compilation failed with the following error message:
Fatal Error: While reading module 'netcdf' found module version 0, expected 8.
Solution:
  • The netcdf library specified in the current Makefile.hdr has been compiled with a different compiler version than the one used for CHIMERE compilation
  • Recompile the netcdf library with the same compiler version as that used to compile CHIMERE


Compilation problem
Strange compiler error messages that refer to a compiler other than the one used to compile CHIMERE, e.g.
gfortran: unrecognized option '-cpp'
when compiling CHIMERE with g95.
Solution:
  • Your MPI library was built with a compiler different from the one used to compile CHIMERE (in the case above Open MPI was built with gfortran).
  • Recompile your MPI library or use another compiler with CHIMERE, so that the same compiler is used.


Compilation question
Is it necessary to recompile the CHIMERE code before each run?
Solution:
  • Until version 2014b, it was necessary to recompile when changing the domain or the subdomains number (nzdoms, nmdoms).
  • But now, you only need to recompile if you change something in the Fortran code. Otherwise, just put imakecompil to 0 in your chimere.par.


Compilation question
When the libraries used, there is a problem reading the soil and surface databases. The error message is:
domains-extract_geog.F90: netCDF error on source line         118 NetCDF: Unknown file format
 Error code is          -51
STOP 1 
Solution: It is the kind of error you have when you try to open a netcdf4 file with a netcdf3.x library version. For the CHIMERE development, we are running the model with netcdf-4.3.1.1 and hdf5-1.8.12, and it works. But we tested only this configuration and we can not guarantee that all libraries are working well with the model.

Simulation question
Is it possible to vertically extend CHIMERE beyond 500 mb (~5km)?
Solution:
  • Yes. Starting from chimere2014 version, the FastJ radiative transfer model is included in CHIMERE to compute photolysis reaction rates. This makes it possible to extend the model domain vertically beyond 500 hPa.
  • But: Note that above 200hPa (~10km amd UTLS), the chemistry is not realistic