Dear Dr Bowen,

Thank you for your responses to the referees’ comments. The referees are supportive of the manuscript but advise improvements to the JPI method formulation, clarifying descriptions of the method, and adding relevant citations. Your proposed revisions in response to all the referee points are appropriate and I would like to invite you to prepare a revised manuscript. It is likely that I will seek again the advice of one or two reviewers after I receive your revised manuscript, so please take care that all the comments are addressed.

To better comply with the Climate of the Past Data Policy I request that you provide digital object identifiers to the publicly-archived repositories where your data and code can be access.

This is an interesting and relevant manuscript suitable for publication in Climate of the Past, subject to these revisions, and I look forward to receiving the new version.

Best wishes,
Helen McGregor

Dear Dr Bowen,

Your revised manuscript cp-2018-178 has been re-reviewed by one of the previous referees. The referee is satisfied with the revisions you have made and I thank you for your efforts. Two new points have emerged however (plus there are some smaller technical corrections). These points will need to be addressed before the manuscript can be published but I anticipate that this should be straightforward. Therefore, please be so kind as to prepare a revised version of your manuscript and a response addressing the referee's points.

Thanks again for submitting your work to Climate of the Past.

Best wishes,
Helen McGregor

Dear Dr Bowen,

I thank you very much for the revised manuscript cp-2018-178 clarifying the points raised by the reviewer. I am pleased to inform you that your manuscript is accepted for publication.

The reviewer picked up a minor edit in the revised version of the manuscript. Could you please make this small technical correction before publication?

Thank you very much for submitting your multi-proxy integration work to Climate of the Past, and many thanks to the two referees for their reviews.

Best wishes,
Helen McGregor