Dear authors,
Thanks for providing a revised version of your manuscript addressing reviewers' comments. Most issues are well addressed in your revised version, however there are two points that need attention before we accept your manuscript for publication:
1. I found confusing your answer to reviewer 1 comment on initial conditions and the corresponding section 4.3. I think there is confusing between the initial conditions of the model run and the spin-up. In both cases you need to start your C stocks from some value, which can be defined as initial condition. I have the impression that Reviewer 1 was referring to the initial condition previous to the spin-up, and your answer and sec 4.3 focuses on the initial condition after spin-up. This difference is important because as you show with equation 4, this model must always go to the same steady-state value independent on the initial condition. This is a mathematical property of all linear autonomous models. However, if you get different steady-state values for different initial conditions, is probably because you have non-linearities that are not captured in eq. 4. This is an important point that requires clarification. You must either confirm that this model behaves as a linear autonomous system expressed as eq. 4, and rewrite your discussion on sec 4.3 mentioning that the model will always reach the same steady-state independent on initial conditions, or you modify equation 4 so the reader better understand what type of non linearity is included in the model that leads to different steady-state values for different initial conditions.
2. The repository that you linked to in GitHub doesn't contain the parameter files that you used to run the model as advertised. Please include these parameter files. Also, please consider Zenodo (https://zenodo.org/) for long-term archiving of your supplementary repository.
Regards,
Carlos A. Sierra