Dear Authors,
You have carefully and satisfactorily answered all of the reviewer´s questions and amended the paper accordingly. The revised paper can now be accepted to ACP. Congratulations. There a number of minor language points that need to be revised prior to publication to ensure clarity. They are quite minor but will prevent any misunderstanding. Please find them listed below.
Best regards,
Jonathan
Abstract – “Some observational evidences” could be reworded to “Observations” have shown or “There is observational evidence that shows that Beijing….”
Page 4, line 21. “a piece of regional environmental issue”. It is not clear what is meant here. Perhaps “”Moreover, ozone pollution is typically a regional rather than a local issue.”
Page 6, “However, variations in urban site are more complicated in different areas”. It is not clear what is meant. Do you mean “Variations at urban sites are generally more complicated than in different areas.” Or do you mean “The variations at this urban site are more complicated than in different areas.”
Page 11, line 6. “Liquid nitrogen as an adsorbent.” In the Entech system the liquid nitrogen is used as a cryogen not an adsorbent.
Page 11, line 9, “when two labs involved” should be “when two labs were involved.”
Page 11, 9, “Two ways” should be “Two types”
Page 11, line 10, “first is check” should be “first is a check”
Page 13, “Olympic Game” should be “Olympic Games”
Page 13, line 9. “is the most responsible to ozone peak “ should be I think “is mostly responsible for the ozone peak”
Page 13, line 16 “simulates urban situation” should be “simulates the urban situation”
Page 15 “in recent decade” should be “in the last decade”
Page 16, line 11, “closed” should be “close”
Page 17, line 18 “as to” should be “with respect to”
Page 19, line 4 “was” should “were”
Page 19, line5 “lower than that” should be “lower than”
Page 19, line 5 “in 2010 has” should be “in 2010 have”
Page 19, line 6 “conclude” should be “explain conclusively”
Page 19, line 8. With the sentence starting “Air mass higher” do you mean “ Air masses above the PBL (planetary boundary layer) will be more mixed”
Page 19. Line 13. It is not clear whether you mean that there was robust growth outside Beijing but NOT within the NCP area, or you mean there was robust growth not only in Beijing but also in the NCP area. Please clarify.
Page 20 line 7, “changed NOx” should be “changed the NOx”
Page 21, line 20. “drop down” should be “decrease”
Page 23 “Combined” should be “Combining”
Page 26, line 5 “term” should be “terms”
Page 27, line 9. “suggest similar” should be “suggest a similar”
Page 27, line 17. “at rate” should be “at a rate”
Page 28, line 19. Consider inserting “emission abatement” between “the” and efforts”
Page 29, line 9. Please consider “….and OH reactivity over long time periods for this region”