Please take careful account of the comments of Referee 1 when preparing your revised manuscript. In addition, I have some more requests based on the review of and your responses to Referee 2.

First, I suggest that you include your assessment of UM model against observation data available in the manuscript. It was included in your response but not in the modified manuscript. Overall dispersion models are highly sensitive to their meteorological inputs and it is necessary to first evaluate these errors and discuss the uncertainties.

Second, I suggest adding a sentence or two to the manuscript on why you used inconsistent settings and resolutions for each year and if these inconsistencies have any impact on the results.

Minor: please add the acronyms definitions to the caption for Table 1. (ASO: August- October, MJJ). Also, please reduce the number of labels on the y-axis of Fig. 4 (e.g. labels at every 200 instead of every 100 ). Perhaps it would be useful to improve the quality of this figure to improve readability

I believe that your paper has merits although, as noted by the reviewer, correspondence between the model and real world is not perfect. Please prepare the final version of the manuscript and take account of the reviewer's recommendations.