Advanced Use of the GCM
Contents
Running in parallel
Distinctions beween ifort, mpi, etc.
Distinction between using IOIPSL or XIOS
How to Change Vertical and Horizontal Resolutions
To run at a different grid resolution than available initial conditions files, one needs to use the tools newstart and start2archive
For example, to create initial states at grid resolution 32×24×25 from NetCDF files start and startfi at grid resolution 64×48×32 :
• Create file start_archive.nc with start2archive.e compiled at grid resolu- tion 64×48×32 using old file z2sig.def used previously • Create files newstart.nc and newstartfi.nc with newstart.e compiled at grid resolution 32×24×25, using new file z2sig.def [NOT RELEVANT??] If you want to create starts files with tracers for 50 layers using a start archive.nc obtained for 32 layers, do not forget to use the ini_q option in newstart in order to correctly initialize tracers value for layer 33 to layer 50. You just have to answer yes to the question on thermosphere initialization if you want to initialize the thermosphere part only (l=33 to l=50), and no if you want to initialize tracers for all layers (l=0 to l=50).
