Dear authors,

I am pleased to inform you that your paper is accepted for publication in ACP after considering the following technical comments given below.

Best regards, Farahnaz Khosrawi

General Technical Comments:
Please check the references for the figures. Since you go quite often back and forth and point on specific panels it is a bit difficult to keep track of all of them. At some occasion I had the feeling that the referencing was not entirely correct (see my comments below).

There are many acronyms used throughout the text and I was wondering if it could be worth to provide a list of acronyms as appendix in the manuscript or in the supplement to make it a bit easier for the reader.

Specific Technical Corrections:
P4, L79: ”….and 2018…” does the year 2018 refer to another Ball et al. paper? If yes, the parentheses should be moved.

P6, L167-168 and L175-176: Paragraphs consisting of just one sentence disturb a bit the text flow. I would suggest to include these two sentences to the respective paragraphs before or after.

P7, L188: Instead of “remain appropriate” I would express that a bit differently. My suggestions would be “ best option” , “best choice” or “best suitable data set”.

P7, L190: boundaries condition -> boundary condition

P8, L243: closing bracket obsolete.

P8, L245: Closing parentheses missing.

P8, L248: The acronym DLM has been introduced, but I think DLMMC not.

P8, L249: I am not sure if the acronym MLR has been introduced.

P9, L273: indicates -> indicate?

P10, L289: Here, I was not sure if you really mean Fig. S3-S5. I would have said only Fig S4 since there you show different latitude bands.

P10, L303: I would say it should read a, b since you discuss the opposing trends.

P11, L332: Fig 3 -> Fig 2?

P12, L334: Fig 3j,k -> Fig 3i,j?

P15, L354: Figs. 4a and c -> Figs. 4a-c?

P15, L373: Fig 1c -> Fig 1a,b?

P15, L382: Fig 5 is quite a tricky one. Took me a while to understand how you did the labeling and why it is as it is. Maybe it could help if you would add at the top of Fig 5 above the left two panels an additional title “Observations” and above the right two panels accordingly “MMM”.

P16, L398: That sentence is quite complicated to understand. I would suggest to move “and chemical changes in” at the end of the sentence and then add “these gases”.

P16, L411: The differences are hard to see. Quickly looking at the figure and comparing them one comes to the conclusion they almost look the same. Of course, if one looks directly at the observations in the plot, it gets quickly obvious. Here, it could be helpful to guide the a bit more since the observations go a bit under in the crowd of the large number of models.

P18, L427: MMM-observations -> MMM-observation?

P18, L443: The reference to Figure 4a,c appears in this sentence twice. One is therefore obsolete.

P19, L456: Really both hemispheres? I see this behavior rather for the NH than SH.

P20, L493: can found -> can be found

Supplement: Title needs to be adjusted (ozone is missing in the title).

Fig S1: The y-axis labeling should be turned by 180°, because now one encounters the problem that when looking at the figure either the x-axis labeling or y-axis labeling is turned upside down.