Dear Dr Lenstra

Thank you for responding to reviewer comments. I would like to invite you to revise your manuscript, paying full attention to all reviewer comments. On the matter of the title, I agree with the first reviewer that it overstates your data somewhat. I therefore request that you change it to the alternative that you have suggested.

Best regards,

Clare Woulds

Dear Dr Lenstra

Thank you for submitting your revised manuscript. I am happy with your responses to reviewer comments, but there are a few places where I would like to see more of the justification that you provided in the manuscript itself. Therefore I would be grateful if you could attend to the following requests:

Reviewer 1 comment #7 Please could you also add the explanation that site NB8 is similar to another high sedimentation site in the Bothnian Sea to your manuscript.

Please include the justification provided in your answers to reviewer 1 comments #22 and #23 in the main text of the manuscript (not just in an appendix).

Reviewer 2 comment#7, please make sure that the likelihood of different salinity changing vivianite burial that arose from your sensitivity analysis is also stated in the manuscript.

Best regards,

Clare Woulds

Dear Dr Lenstra

Many thanks for making additional changes, I am now happy to recommend your manuscript for publication.

Best regards,

Clare Woulds