Dear authors,
Two referees evaluated positively your manuscript (MS), and I would like to thank both of them for their constructive comments. You provided detailed responses and suggestions of how to address the referee’ comments in a revised MS.
Based on these responses, I would like to ask you to upload a revised MS taking into account all referee comments. A track-changed version would help me to assess the modifications.
Best wishes,
Etienne Berthier

Dear Authors,

I have now read your revised manuscript (MS) along with yours responses to the referees. You addressed satisfyingly their comments.

I still have a couple of minor editorial comments before the MS can be published (see below). Thanks for considering them before uploading the final files for copy-editing.

Do not hesitate to contact me if you have some further questions.

Thanks a lot for choosing TC to publish this work.

Best regards,

Etienne Berthier

L88. either (option 1) use “e.g.,” before 1-2 references only (the two oldest?), or (option 2) be more exhaustive in your list of studies describing cascading water under the Antarctic Ice Sheet (at least one of them come to my mind, being co-author of it, Flament et al., TC, 2014, 10.5194/tc-8-673-2014). I think option 1 would work best here.

Supporting videos. They are great but is there a way for you to include a caption for them on the website? Otherwise they are not necessarily straightforward to interpret.

Figure 1A. I find it hard to see the squares representing the location of the GNSS stations. Increase size maybe?

Figure S2. Need labels (=values) for the X-axis and Y-axis of the inset time series.