Dear Dr. Brown

I have read your revised manuscript and the responses to two reviewers comments. You and your co-authors have addressed some issues the reviewers raised in their previous reviews. But I would like to go back to these two reviewers to let them comment on the revised manuscript and your responses. Please upload the revised manuscript and your responses to the website. Currently your revised manuscript and the responses are as supplement files that reviewers and public do not have access.

I look forward to seeing the second round of reviewing, and hopefully we can make a decision after the reviewers provide their feedbacks.

Thank you for your contribution to Biogeosciences.

Cheers, Fei

Dear Dr. Brown

After reading your revised manuscript and responses to two reviewers, I think you and your co-authors have addressed all the reviewers concerns and comments. Therefore, I recommend you revised manuscript to be published in Biogeosciences. I thank you for considering Biogeosciences and looking forward to your contribution in the future.

Regards, Fei