Dear Authors:

Thank you for contribution to Biogeosciences and for sending your responses and revised manuscript. I studied your point-by-point responses and found that you replied properly to almost all comments. Also, you performed additional simulations as shown in Supplement as suggested by the referees, making it easier to catch the meaning of this study. You added a list of “Terminology and definitions” in Supplement and added explanation about the difference between mineral and organic soil carbon pools. However, it is still slightly difficult and confusing for me to correctly understand what happened in the transition of thermokarst lakes and wetland. As a possible solution, can you show such transitions by a schematic diagram like Figure 1? This is not a mandatory but an optional correction to improve clarity of your manuscript. Finally, I conclude that this manuscript would be acceptable for publication.

Best regards,
Akihiko Ito