Dear Authors,

Thank you for your consideration of the referees’ comments. I agree with Referee #1 that many of the comments have been addressed; however, there remain a few minor issues that should be addressed prior to acceptance. In addition to Referee #1’s comment regarding transmission efficiency, please consider the comments below.
1. Lines 95-98: I encourage the rethink the wording regarding “finer time scales” and to use something that makes it more clear that hourly resolved diurnal patterns or 24-h average time-series data are being analyzed. This would better represent the results of this paper and may avoid confusion regarding the difference in time-scales achievable with AMS total loading vs. size-resolved measurements.
2. Lines 165-168: For completeness, the lower limit transmission efficiency should also be discussed.
3. Lines 170-172: The possibility of slow vaporization and its influence on the results should be discussed.
4. Line 189-190 and elsewhere: “attributable to traffic and cooking sources” These references to previous factor analysis of the data are numerous. It may be unclear to some readers that these results come from a previous analysis. Since much of the interpretation of the variability in the organic aerosol uses this past analysis, I suggest adding a few sentences in Sect. 2.1 to explicitly clarify where the factors come from (i.e. which publication) and a very brief overview of how they were derived.
5. Please address the large discontinuity between the beginning and end of the day for O3 and NOx in Figure 2a and for NOx in Figure 2b.
6. Figure 3: Please provide one larger legend rather than 4 legends.
7. Please reorder the figures so that they are referenced in order (figure 3 is currently referenced after figure 4)
8. Line 311: I suggest changing “points to” to “suggestive of” or something similar. Given the lack of supporting measurements, the interpretation should be cautious.
9. Sect 3.2: I suggest changing the title to “Day-to-day size distributions and seasonal averages” to better represent the content of the section.
10. Page 478: Suggest adding “from spring to summer” after “displayed a moderate decrease in mode diameter” to increase readability.
11. Figure 5: Only panels a and b are labeled but the legend mentions panels a-l.
12. Figure 6: The caption does not match the figure with regards to the labeling of the panels.
13. Figure D15 is much too small to read, particularly the legend. Please clarify in the caption the significance of the yellow shading.
Sincerely,
Ellie Browne