I am pleased to say that, subject to minor revisions along the lines you have indicated in your responses, I expect this paper will be acceptable for publication in Climate of the Past.

You have received two constructive and broadly positive reviews, and your responses suggest approaches that should address various minor issues. Please submit a new version, revised as indicated, with a final log of changes and responses, for final consideration.

Thanks to the authors for a very thorough revision. I am very happy to recommend that the manuscript be accepted. There is one small ambiguity on pg 3 L17-19... it would appear that the authors wish to say that high-resolution records of [both] ammonium and formate are few in number. The meaning can be inferred, but insertion of the word 'both' helps to clarify.