Dear Dr. Lilien et al.,

Thank you for your exceptionally clear response to the reviewers and your careful navigation of the challenges of the Brief Communication format and their comments. Your careful consideration of the discontinuous reflections issue is particularly appreciated. I am thoroughly satisfied with your response and expect that the revised MS will address all outstanding comments, but I will examine it one last time upon receipt of the revised MS.

Thanks again for your submission to The Cryosphere,

Joe MacGregor
NASA/GSFC

Dear Dr. Lilien et al.,

Thank you for producing this excellent revised MS that is responsive to all major reviewer concerns. I will accept it pending the revisions/corrections:

- TC convention for the main text (not captions) is to generally abbreviate "Section" as "Sect." (not "Sec.") and "Figure" as "Fig.". See https://www.the-cryosphere.net/submission.html
- 56: Please convert to decimal degrees, which are simpler and more modern.
- 69: 7-12 m/s seems remarkably fast for a ground-based survey of a small region. Could you double-check that these values are accurate?
- Figure 1 caption: "BedMachine Antarctica v2" not "BedMachine v2".
- In geology, the convention is to use "yr" as the abbreviation for year when referring a period of time and "a" as the abbreviation when referring to a past time. See https://www.geosociety.org/gsatoday/archive/22/2/article/i1052-5173-22-2-28.htm for a discussion. By that IMO sensible convention that I readily admit I have not always adhered to in the past myself, e.g., "41-kyr" cycles should be used rather than "41-ka", etc. Please review the MS with this in mind. In my instances, I believe "kyr" should be used rather than "ka".

Thanks again for this excellent short submission to The Cryosphere,

Joe MacGregor
NASA/GSFC