Dear Authors, please note that the two reviewers had some minor comments left that need to be addressed before publication in ACP. Please address these last round of comments and I will move quickly to make a final decision. Due to the nature of these minor comments, once you address these comments I will be able to accept your manuscript. Thank you again for submitting this work to ACP. Most sincerely, Jason Surratt

Dear Authors,

Thank you for addressing the reviewer comments. I think you have addressed these well. I re-read the manuscript carefully and found a few more grammar edits that need to be made. This won't take you long at all to do. Once you address these I will accept for ACP immediately. Thank you again for submitting this work to ACP. Most sincerely, Jason Surratt

Lines 33 -34: please change "were partitioned onto particle phase" to "partitioned into the particle phase,"

Line 69: Change "the" to "a"

Line 70: Delete "close"

Line 71: Delete "the" before "severely"

Line 71: Change "climate in" to "atmospheres of"

Line 80: Delete the word "the" before "severely"

Line 80: Change "atmosphere in" to "atmospheres of"

Line 84: Change "co-existed" to "co-existing"

Line 106: Change "online monitored" to "measured in real-time"

Line 129 and elsewhere please make sure "m/z" is italicized.

Line 502: delete "were"

Line 503: Change "onto particle phase" to "into the particle phase"

Line 507-508: Change "that it should pay more attention to the SOA formation from biomass burning" to "that more attention is necessary on the SOA formation from biomass burning"

Line 512: Change "should be tightly combined" to "are tightly coupled,"

Thank you authors! I'm pleased to accept your paper for publication in ACP. We hope you will continue considering to publish your work in ACP. Best wishes, Jason Surratt