Do we need med_id?

[rsdunlapiv]

There is a med_id variable that is set inside of the intenral state: https://github.com/ESCOMP/CMEPS/blob/22dc297fa3f77cf1a232618f5428c89b460032ca/mediator/med_internalstate_mod.F90#L19

The use of component ids seems to be a carryover from before the NUOPC implementation. The med_id is only used in med_io_mod.F90.

#ifdef CESMCOUPLED
    io_subsystem => shr_pio_getiosys(med_id)
    pio_iotype   =  shr_pio_getiotype(med_id)
    pio_ioformat =  shr_pio_getioformat(med_id)
#else

The primary issue is that the med_id has to be set externally by the driver, but it is not clear in general how this should be set from a general NUOPC driver that is using CMEPS (e.g., UFS).

[rsdunlapiv]

@DeniseWorthen I opened this here to see if the med_id really needs to be retained.