Articles | Volume 17, issue 9
Research article
 | Highlight paper
26 Sep 2023
Research article | Highlight paper |  | 26 Sep 2023

Modes of Antarctic tidal grounding line migration revealed by Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) laser altimetry

Bryony I. D. Freer, Oliver J. Marsh, Anna E. Hogg, Helen Amanda Fricker, and Laurie Padman


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on tc-2022-265', Pietro Milillo, 09 Mar 2023
  • RC2: 'Comment on tc-2022-265', Kasia Warburton, 13 Mar 2023
  • RC3: 'Comment on tc-2022-265', Tian Li, 19 Mar 2023

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Publish subject to revisions (further review by editor and referees) (25 May 2023) by Bert Wouters
AR by Bryony Freer on behalf of the Authors (15 Jun 2023)  Author's response   Author's tracked changes   Manuscript 
ED: Referee Nomination & Report Request started (28 Jun 2023) by Bert Wouters
RR by Tian Li (09 Jul 2023)
ED: Publish subject to technical corrections (09 Jul 2023) by Bert Wouters
AR by Bryony Freer on behalf of the Authors (09 Aug 2023)  Manuscript 
This paper is worthy of a highlight. The authors show the importance of a process that has been known to exist but hasn’t been measured in this detail before. From a public interest perspective, the results might be tricky to explain in general terms, but the key results fit within the category of “major discovery” and/or “mystery”.
Short summary
We develop a method using ICESat-2 data to measure how Antarctic grounding lines (GLs) migrate across the tide cycle. At an ice plain on the Ronne Ice Shelf we observe 15 km of tidal GL migration, the largest reported distance in Antarctica, dominating any signal of long-term migration. We identify four distinct migration modes, which provide both observational support for models of tidal ice flexure and GL migration and insights into ice shelf–ocean–subglacial interactions in grounding zones.