The response to the reviewer comments was adequate, except for two comments from Dr. Liu for which you responded well, but did not change the text of the paper. To avoid confusion, I'll just ask that you modify the text of the paper for these two comments before it can be accepted for publication:

3). Section 2, 2nd paragraph: "Time series data were archived with 3-hr temporal resolution at the Summit grid box" — I think you meant "grid column". Moreover, it is not clear how the model output was sampled in the vertical. The elevation of Summit is 3212m asl. Did you sample the model bottom layer, or the model vertical layer that is about 3212m above the sea level? The latter may very well be different than the former because the topography is not well resolved at coarse resolution. Would the results about model overestimates or underestimates found in this paper be different if the alternative way of model sampling is used (e.g., lines 206-207)?

Line 77: "....used to be the global default anthropogenic C2H6 emission inventory" - Do you mean "default" in GEOS-Chem or any other models?

Again, please just ensure that the text of the paper is modified to clarify these points.

Thanks