Dear Karel Castro-Morales and colleagues

thank you for uploading your response to the review comments.

Both reviewers requested major revisions. They indicated that they are willing to re-review the paper. I ask you to submit a suitably revised version of your MS (without mark-up) as well as your author response including a marked-up MS version. I will then send out the MS and your response to the two original reviewers.

Please note the guidelines for the author's response (https://www.biogeosciences.net/for_authors/submit_your_manuscript.html):

"The author's response in case of "minor" or "major" revisions must be submitted as one separate *.pdf file (indicating page and line numbers) structured in a clear and easy-to-follow sequence: (1) comments from referees/public, (2) author's response, and (3) author's changes in manuscript. Regarding author's changes, a marked-up manuscript version (track changes in Word, latexdiff in LaTeX) converted into a *.pdf and including the author's response must be provided."

You typically do not provide revised text as requested under point (3) in your current reply. I kindly ask you to add below your answer the specific quotes from the revised MS to the extent this is reasonable and practicable. In this way the reviewer and the editor have the opportunity to directly learn how the MS is revised in response to a specific comment.

Thank you for submitting your work to BGD and the ICD10 Special Issue.

With kind regards, Fortunat Joos

Dear Karel Castro-Morales and colleagues

Thank you for your revised manuscript and for your careful response to the review comments. Based on the very positive recommendation of both reviewers and my own reading, I am happy to accept your manuscript for publication in Biogeoscience.

One reviewer noted that figures are to be improved. Particularly larger fonts on axis labels, for readability, are recommended. I share this concern and aks you to carefully revisit the design of your figures (with appendix) and that you adjust font sizes where necessary.

Thank you for submitting your work to Biogeosciences.

Yours sincerely, Fortunat Joos