Dear authors,

I see that you have dealt with most reviewer comments and I will be happy to accept your paper for publication in ACP after the minor revisions outlined below.

Best,
Anne

1. P6, lines 26-29: I find this wording a bit confusing. I recommend rewording to something like "they would constitute, on average, 7% or less of INP-8 found prior to treatment."

2. For Figure 2, I think your choices with the axes are fine and I would omit the statement about "disentangling an otherwise crowded display of the data." in the figure caption.

3. P1, L12-14: I am also unclear what you mean by this sentence in either the original or revised manuscript. Do you mean to say that transport model calculations indicate a stronger relationship between INP-8 concentration and source region than between INP-8 concentration and either fractional land cover or land use type? I don't see why precipitation is included in this sentence but maybe I am simply missing your meaning.

4. P5, lines 25-27: These sentences are also hard to follow. In the first sentence you have a double negative and I just don't quite follow the logic.