Scaling of methane at restart
I have included the option to rescale the methane mixing ratios and slopes read from the restart file by a constant factor. This allows to create reasonable intial conditions for starting the model anytime between pre-industrial and future, using a restart file for the present day.
The scale factor can be specified using the following flag in the rc-file:
restart.factor.ch4 : <value>
If commented, no scaling will be applied.