Sometimes, you want to use the same initial conditions files between different horizontal resolutions, or use initial conditions from one simulation with different resolution to another to avoid re-running a long simulation for initial conditions. There is a tool available in the CESM code that can help interpolate between one grid and another and can be applied to create initial condition files. The code is housed in your {cesm_code_sandbox}/components/cam/tools/interpic_new. First compile the code following instructions in the README. Then use the executable:
interpic -t template_file.nc file1.nc file1_L32.nc