|I would like to thank the authors for taking my comments into account and revising the manuscript accordingly. However, one of my comments did not came across well. I did not mean that the model evaluation is unnecessary. My point was that the weighting how the results were described was not done in the correct way. There was to much focus on the evaluation instead of the investigation of the IAV which was supposed to be the main focus of the paper. However, with the revisions done the manuscript reads now much better and I do not feel any mismatch any longer.|
Nevertheless, I have several technical comments that should be considered before publication:
P2, L45: “replay simulations” → I would suggest to either skip here “replay” or you explain what is meant with replay simulations. Alternatively, you could also add the reference to the Orbe et al. 2017 paper if you do not want to skip replay.
P2, L63: I would suggest to skip “tropospheric” since this is confusing. Usually, CTMs simulate the entire atmosphere. If you want to emphasize that the simulation run had a focus on the troposphere it should be said more clearly.
P2, L73: Plural or singular? Thus, either “used a nudged CCM simulation” or “ used nudged CCM simulations”.
P3, L101: Sentence “More detailed information on replay methodology can be found in Orbe et al. (2917)” is obsolete since you refer to the replay simulation and the Orbe et al. reference already a few sentences before.
P4, L127: in UTLS → in the UTLS
P4, L150: Centers → Center
P4, L159: Model did not → The model did not
P5, L168: relatively weaker → I would suggest to either write “relatively weak” or “weaker”.
P5, L171: observed ozone → specify which observations
P5, L183: lost parentheses at the end of the sentence.
P5, L203: …..IAV is mall, only become significant…..→ sentence not clear, please rephrase
P7, L275: by Browell et al. (Browell et al., 1996) → by Browell et al. (1996)
P9, L350: shows the → shows a
P9, L355: weakend descending air → please rephrase, e. g. to “weak descending air”
P10, L376: N. America → North America
P10, L394: near surface → near the surface
P10, L398: show a similar → shows a similar
P10, L403: tropospheric O3 in the troposphere → repetition, please rephrase
P15, Table2: Ny Aleasund → Ny Alesund
P16, Figure 1: Ny Aleasund → Ny Alesund
P18, Figure 4 and Figure 5: Figures should be done in a consistent way. Here, the x-axis labeling is missing (add year) and the headers should be written in the same way (same font, same abbreviation for North America).
P19, Figure 6: Same here as for Figures 4 and 5. Additionally, remove the y-axis labeling in the middle of the figures. N. Am should be N. American toe be consistent and height of the right 4 figures should be adjusted to the left 4 figures.
P19, Figure 6 caption: top → Top, bottom → Bottom
P20 and 21, Figures 7 and 8: Increase space between the panels. What is the additional colour bar (light pink) for? Cannot this be skipped?
P20, Figure 7 caption: Do not start sentence with a number → sentence should be rephrased.