Dear Authors,

Thanks for revising your manuscript following the reviewers' comments. After I read your manuscript, I have the following comments which should be addressed:
1) As one reviewer indicated, "English needs to be improved; Chinese style English can be seen in many places throughout the manuscript". I urge you to have a native English speaker or a person with good English writing to read through your manuscript carefully to improve the manuscript writing. I can see many grammar errors. This is especially important for your paper to improve its readability in order to gain a wider attention in the international community, and to meet the high standard of ACP.
2) You need to define the East Asia domain in the first place when using it.
3) Table 2 caption, is it "clean" episodes?
4) Abstract is too long, and try to condense it.

There are some comments from one reviewer. Please address these comments as well:

1. Fig. 2, why do not also look at precipitation? It is highly related to the aerosol wet removal, and hence the aerosol loading and AOD. When checking precipitation, a few days before the events may also be important, because it will affect the accumulation of pollutants. If there is no precipitation in any investigated days, please clarify in the paper.
2. Please clarify in the caption about what are the meanings of T1-T9 in Fig. 18.
3. In Fig. 8-16, it seems that temperature is also higher in the polluted cases than that in the clean cases, particularly for type 1 and 2. Please discuss some potential impact of the higher temperature on the increase of pollutants.
4. Yang et al., 2013 is not in the reference list.

This version of the manuscript has been improved. However, there are still grammar errors, especially the use of “the”, “a”: they are missing in some places, while unnecessary in other places, such as there should be a "the" in “in the lower troposphere”, etc.

I am giving some examples below. The authors are required to go through the manuscript to have a careful check.

Page 2. Ln 10 and 16. Missing “the”
Page 3. Ln 5. “attracted” -> “attracting”.
Page 5. Ln 12. “CO” and “NO2”. When these symbols first time occur in the text, it is important to have the full names written, e.g., “carbon monoxide”.
Page 6. Ln 17. Grammar error “rapidly increasing of..”
Page 12. Ln 5. Grammar error “it were”.
Page 14. Ln 6-7. Rewrite “…the high frequency of above 65% area of East China is less than 50%”. It is difficult to understand.
Page 15. Ln 2. Grammar error “represents for”.
Page 20. Ln 8. Remove “the” in “the Table 2”.