Dear authors

Thank you for your replies to both reviewer reports. I invite you to revise your manuscript in the light of their comments. Once you have submitted your revised manuscript I will ask for further reviewer reports from the initial reviewers as I would like to give both reviewers the opportunity to review your response to their main comments and suggestion.

Dear Authors,

The latest reviewer report has indentified a relatively minor issue that I would like you to address before publication. I will review the revised manuscript.

The issue is some potential ambiguity over non-linear feedbacks in the carbon cycle. I do agree with the reviewer that it would benefit the manuscript for there to be a clearer explanation of the role of the non-linearities in carbon cycle feedbacks that you describe in Lines 456 and 472. I don't wish to preempt any response to these reviewer comments, but I think this could be addressed easily and concisely. Consequently I consider this to be a minor revision.

Dear Authors

Thank you for your revised manuscript. This addresses all reviewer comments. Your additional minor changes also help further clarify some other minor issues. I have recommended publication. Congratulations on your insightful study.