Dear Authors:
I have now received two reviewers' comments on your paper. As you can see both reviewers generally consider the topic interesting and worth being published. At the same time, however, the reviewers also raise a number of concerns on several issues. Particularly, as noted by reviewer #2, the paper needs streamlining and more focus. Please address the issue raised by the reviewers in a revised version of your paper including a letter stating point-by-point how you addressed the reviewers' comments in your revised manuscript.
Please note that the revised version will be most likely sent out to the same reviewers again. Hence, a thorough revision of the manuscript is highly recommended.
Best wishes, Gerhard Herndl

Dear authors:
I have now received the reviewer's comments on your revised manuscript. As you can see from the comments, the reviewer is pleased with the way you addressed the previous comments of the reviewers. Hence, I appreciate being able to inform you that the paper is now acceptable for publication in Biogeosciences.
Thanks for choosing Biogeosciences as an outlet of your interesting research.
Best wishes, Gerhard Herndl