20 May 2022
Research article | 20 May 2022
Shear-margin melting causes stronger transient ice discharge than ice-stream melting in idealized simulations
Johannes Feldmann et al.
- Final revised paper (published on 20 May 2022)
- Supplement to the final revised paper
- Preprint (discussion started on 19 Oct 2021)
Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor |
: Report abuse
RC1: 'Comment on tc-2021-327', Anonymous Referee #1, 16 Nov 2021
- AC1: 'Reply on RC1', Johannes Feldmann, 05 Feb 2022
RC2: 'Comment on tc-2021-327', Anonymous Referee #2, 16 Nov 2021
- AC2: 'Reply on RC2', Johannes Feldmann, 05 Feb 2022
RC3: 'Comment on tc-2021-327', Anonymous Referee #3, 14 Dec 2021
- AC3: 'Reply on RC3', Johannes Feldmann, 05 Feb 2022
Peer review completion
AR: Author's response | RR: Referee report | ED: Editor decision
ED: Reconsider after major revisions (further review by editor and referees) (10 Feb 2022) by Elisa Mantelli
AR by Johannes Feldmann on behalf of the Authors (08 Apr 2022)  Author's response Author's tracked changes Manuscript
ED: Referee Nomination & Report Request started (15 Apr 2022) by Elisa Mantelli
RR by Anonymous Referee #1 (27 Apr 2022)
RR by Anonymous Referee #2 (29 Apr 2022)
ED: Publish subject to minor revisions (review by editor) (29 Apr 2022) by Elisa Mantelli
AR by Johannes Feldmann on behalf of the Authors (05 May 2022)  Author's response Author's tracked changes Manuscript
ED: Publish as is (05 May 2022) by Elisa Mantelli
The focus of this paper is on the sea-level rise response from localized melting on regions of a buttressing ice shelf. The melting is applied either at the grounding line or along the lateral edges where the topography increases and the downstream flow is slower (Figures 2 & 3), i.e. the shear margins. The difference between the effects of additional melting at the grounding line versus melting below the ice shelf shear margins is notable. And it make sense from a force balance perspective, thinning the shear margin lowers the buttressing balance and the ice stream will accelerate. Similarly, if we considered a unbuttressed ice shelf with a single pinning point, it would be clear that melting at the pinning point would affect the flow more than melting at the grounding line. Although it is an intuitive result with few actionable consequences, I would tepidly support publication in The Cryosphere.
the force balance argument described above doesn't appear in the text and the description of the difference between the grounding line and shear margin melting is too thin.
I find the 'three dimension' description of the simulations as misleading, since SIA/SSA hybrid can have three-components but is still depth integrated.
the second sentence in the abstract is missing a comma before `the melting'.
what is solid-ice? I would replace this with 'grounded' both in the abstract, introduction, and anywhere. Right? Solid, as opposed to what?
it seems like the SM1 is nearly as effective at instigating ice flux as SM2, yet the text in the second paragraph on page 5 is confusing as compared to Figure 4.
lastly, it seems like the authors have discovered for themselves why shear margins are important. Yet I know that others have worked on shear margins, such as Lhermitte et al (2020). I suggest a clearer connection to the existing literature.
S. Lhermitte, S. Sun, C. Shuman, B. Wouters, F. Pattyn, J. Wuite, E. Berthier, and T. Nagler. Damage accelerates ice shelf instability and mass loss in Amundsen Sea Embayment. PNAS, 117(40):24735–24741, 2020