Dear authors,

Thank you for submitting your revised manuscript; after reading it and your Response to Reviewers through I feel that you have addressed the reviewers’ technical questions well through these revisions and the addition of the Supplement.

However, as one minor point, the figures are all missing units (and aside from Figure 10, colour scales). As the main interpretation of Figures 2, 3, 4, 5, 7, 8, and 9 is qualitative and not quantitative, I don’t think a colour scale is necessary for these Figures. However it would be useful to the reader to add some interpretation in the captions: I infer this is digital counts being mapped linearly (with purple through yellow being low to high), but this should be stated directly somewhere (e.g. in the Figure 2 caption, and then add a statement in later captions referring back to Figure 2). Similarly, both panels of Figure 10 need the units stated (and the right-hand panel needs axis labels, even though the x-axis is described in the caption).

Other than that, I am happy to accept your manuscript for publication in AMT.

Best wishes,

Andrew

Dear authors,

Thank you for the requested figure/caption updates - I am pleased to accept this version of your study for publication in AMT.

Best wishes,

Andrew