Dear Authors,

I am happy to accept your manuscript for publication in Atmospheric Chemistry and Physics after you have addressed the minor comments given below.

With kindest regards,

Daniel Knopf

Minor revisions:
Main text:
l. 225: “Third, an overall increase of particulate nitrate was implied in NCP and YRD in the past decade, especially that during summertime.” What does this sentence mean? I assume you have to cite the studies which showed “that particulate nitrate increased in the areas of NCP and YRD during the past decade”.

Supplement:
Figure S1 and its figure caption are not clearly presented. Somehow, the actual VOC concentration has to be given, maybe below 10%, 50%, and 90% percentiles and/or in figure caption? Also, the color coded ratio is not well described. It states “by the ratio of the calculated nitrate with varied uptake coefficients”. This is difficult to understand. Is it the ratio of nitrate (in which units?) divided by uptake coefficient? Please improve on this description and make it easier for the reader to follow.

Table S1: Please correct citations. For example, Wen, Chen et al., 2018. What does this mean? Is it Wen et al., 2018 and Chen et al., 2018? Also, Pathak and W.S. Wu, 2009. Is it Pathak and Wu, 2009?

The reference list is missing in the supplement document.

Dear Authors,

I am happy to accept your manuscript for inclusion as an article in Atmospheric Chemistry and Physics.

With kindest regards,

Daniel Knopf