Dear Dr. Wade:

Thank you for submitting your manuscript entitled "Simulating the Climate Response to Atmospheric Oxygen Variability in the Phanerozoic" to Climate of the Past.

Your manuscript has been read by two anonymous reviewers and by Jim Kasting. While the three reviewers recognize the importance of your work, they also ask for substantial modifications of your manuscript.

I have now read your answers to the reviewers and I’ve greatly appreciated the way you answered to each comment. Questions about the potential non equilibrated state of the coupled simulations and about the comparison of the codes used to implement the effect of O2 on atmospheric physics are non-trivial as you pointed out. I encourage you to clarify these two points in your revised paper, by providing the readers the level of details required.

I agree with the reviewers that moderate revision may be sufficient to make the manuscript acceptable for publication in Climate of the Past. Hence, I encourage you to submit a suitably revised version of your manuscript taking into account as much as possible reviewer assessments (as you already did in your answers).

I look forward to receiving your revised manuscript. If you have any questions, please contact the editorial office at editorial@copernicus.org
.

Sincerely,

Yannick Donnadieu

Dear authors,
based on the second review by one of the three reviewers of your paper; I am pleased to accept it for publication in Climate of The Past.

The success of EGU journals depends on your contributions. Thank you for submitting your best work to us.

-- Yannick Donnadieu