Dear authors,

Many thanks for responding to the referee comments. As you may have seen, the evaluation of the referees was very divers. Both referees highlight that the study is interesting and a valuable contribution. Referee#1 was very happy with the manuscript as it is, however, referee#2 raised a number of concerns. I have therefore decided that major revisions are required before the manuscript can be accepted for publication. I would like to invite you to submit a revised manuscript that I intend to send back to referee#2 for further review.

Regards
Peter Landschützer

Dear authors,

I have now received the second review from referee#2. As you will see, the referee acknowledges that the revised manuscript has improved and that the majority of previous concerns have been addressed. In the report, however, the referee raises a number of concerns, that I would like you to address. In particular, the referee suggests a restructuring of the methods, results and discussion sections to improve readability. I believe the suggested changes are of minor nature (since this will not influence the scientific content of the manuscript itself) which I will review myself.

Best regards
Peter Landschützer

Dear authors,

many thanks for revising the manuscript. Based on my reading, I am now happy to accept your manuscript for publication in BG. I have however indicated technical corrections in my decision report. What I would like you to consider - upon uploading the final files - is to improve readability of the figures for visually impaired readers. This concerns figures 3, 5 and 2e, where color lines are close to each other. If possible, adding symbols or dashes would help the reader next to the difference in color.

Best regards
Peter Landschützer