Dear Dr. Liu,

I am generally satisfied with the responses to the reviewers who have done an admirable job helping identify technical aspects that required clarification.

There are two points I would like to see addressed. First is that the English is at times idiosyncratic and could benefit from some rewriting from a native English speaker.

Second, ACP is not primarily a technical journal, so to be publishable the work needs to be placed in a broader scientific context. There is some very interesting information on the seasonal cycles of clouds at Barrow and Eureka that is described in Section 3 but not mentioned in either the abstract or conclusions. Nor are the results contrasted with prior ground and space based studies into the seasonal cycles of clouds in the Arctic and at Barrow and Eureka. As reviewer 2 pointed out, there is a broad interest in arctic clouds, so greater emphasis could be placed on these points.

I will look forward to a revised version of the manuscript.

Regards,

Tim Garrett