def set_coupling_timestep(experiment, timestep, model):
# Change timestep in the namcouple files.
for n in namcouple:
nc = Namcouple(n % (experiment), model)
nc.set_ocean_timestep(timestep)
nc.write()
if model == 'auscom':
nml = FortranNamelist(input_atm % (experiment))
nml.set_value('coupling', 'dt_atm', timestep)
nml.write()
nml = FortranNamelist(input_ocn % (experiment))
nml.set_value('auscom_ice_nml', 'dt_cpl', timestep)
nml.set_value('ocean_solo_nml', 'dt_cpld', timestep)
nml.write()
nml = FortranNamelist(input_ice % (experiment))
nml.set_value('coupling_nml', 'dt_cpl_io', timestep)
nml.write()
