Dear authors,

thanks for providing detailed replies to the reviewer comments.

The HESS procedure however was not quite followed correctly. Please read the details about the process on the website.

It is now a two step process where first you were asked to simply provide an online-reply suited to public discussion. Based on that the the editor decides whether a revised version is invited to be submitted and which type of revision is required. If the decision is not 'reject', only then are you asked by the HESS system to prepare and upload a full point by point rebuttal and the revised manuscript for further review.

Based on the already-provided point by point responses, I have decided that major revisions are necessary. The HESS system will now invite you officially to provide the revised manuscript for re-review. Therefore, when asked by the system, please upload both, the file with the 'response' and the file with the 'revised manuscript' into the HESS system again when the system asks you for it. Only then will the reviewers be able to access both those files properly and together with the assessment form.

Best regards,

Kerstin Stahl

Dear authors,

thanks for addressing the reviewer comments so thoroughly. I agree with the reviewer who has assessed the revisions that the manuscript can now be published. I think the revisions have made the work much more robust.

Best regards
Kerstin