user_init Subroutine

    subroutine user_init(comp, importState, exportState, clock, rc)
      type(ESMF_CplComp) :: comp
      type(ESMF_State) :: importState, exportState
      type(ESMF_Clock) :: clock
      integer, intent(out) :: rc

      ! Local variables
      integer :: itemcount
      type(ESMF_Field) :: humidity1, humidity2
      type(ESMF_VM) :: vm

      rc = ESMF_SUCCESS
      print *, "User Coupler Init starting"

      call ESMF_StateGet(importState, itemcount=itemcount, rc=rc)
      if(rc/=ESMF_SUCCESS) return
      print *, "Import State contains ", itemcount, " items."
       
      ! Get input data
      call ESMF_StateGet(importState, "humidity", humidity1, rc=rc)
      if(rc/=ESMF_SUCCESS) return
      ! call ESMF_FieldPrint(humidity1, rc=rc)

      ! Get location of output data
      call ESMF_StateGet(exportState, "humidity", humidity2, rc=rc)
      if(rc/=ESMF_SUCCESS) return
      ! call ESMF_FieldPrint(humidity2, rc=rc)

      ! Get VM from coupler component to send down to Regrid Store routine
      call ESMF_CplCompGet(comp, vm=vm, rc=rc)
      if(rc/=ESMF_SUCCESS) return

      ! These are fields on different Grids - call RegridStore to set
      ! up the Regrid structure

      call ESMF_FieldRegridStore(srcField=humidity1, dstField=humidity2, &
                                 routeHandle=routehandle, &
                                 regridmethod=ESMF_REGRIDMETHOD_BILINEAR, &
                                 rc=rc)
      if(rc/=ESMF_SUCCESS) return

      print *, "User Coupler Init returning"
   
    end subroutine user_init