While you have improved the manuscript considerably, more revisions are needed.

Dear Dr. Chen,
I have reviewed your revised manuscript and found you have addressed most of the issues well. However, there are still issues that need more work.
1. Since all previous reviewers raised a question about the use of "upper air visibility", it's imperative to clearly explain its scientific meaning and value for your study. It'd be more helpful if you can do a more literature search on the past usage of this term, which may give you a sense why or why not it has been used.
2. There are numerous confusing statements that are hard to be comprehended by others. You should carefully check throughout the paper to assure they are clearly written.
Please submit a clean version of your revised manuscript.