Dear Dr Jia and colleagues,
After careful consideration of the extensive amendments and corrections you have made to the original submission, and given that all comments received acknowledge that some clarification for the atmospheric science community is warranted, I accept your ms for publication in ACP subject to the minor technical corrections listed below,
Sincerely,
Rob MacKenzie

Throughout: please replace "log10" with "log_{10}" - i.e., subscript the base of the logarithm function.
Throughout: I think it is easier to read the values with uncertainties in the form (1.98±2.50)×10⁻² rather than 1.98×10⁻²±2.50×10⁻².
p1, line 20: please replace "It has been shown theoretically" with "Established theory dictates"
p2, line 27. should be "negative log (base 10) of the activity of..."
p4, line 2. please write " this issue has not been addressed with sufficient care..."
p6, line 4. Should be "There are slight differences..."
p6, line 24ff. Please recognise that this result is already in the literature by citing eg Robinson and Stokes.