This paper investigates recent and anticipated future changes of the distribution of marine glacier ice in Milne Fiord. Using a combination of observations and ocean-circulation modelling, the authors examine how glacier retreat affects subsurface ice melt. The removal of the ice shelf and the ice tongue is found to have only a small impact on the melt at the grounding line of Milne Glacier.

The paper is well structured and written, and should be published after some minor revisions.

Comments

1) It would be useful to connect the present study to work in North Greenland (see e.g., Hill et al., 2017), as similar conditions prevail in this part of the Arctic. The paper cite many studies from Antarctica and Southern Greenland, but Petermann is the only glacier in North Greenland mentioned. In the discussion around L24, it would be relevant to cite Jakobsson et al. (2020) and Nilsson et al. (2023), who investigate the role of sills for blocking inflows of Antarctic Atlantic Water in north Greenlandic fjords. On L70 Thwaites is mentioned, but also C. H. Ostenfeld Glacier in North Greenland has a recently disintegrated ice tonunge (Hill et al., 2017). And Ryder and C. H. Ostenfeld glaciers are situated in fjords that terminate in the perennially sea-covered Lincoln Sea (Hill et al., 2017).

2) Please describe the implementation of the subglacial discharge in the model in section 3.1; this issue is commented on around L355.

3) Check the consistency of the dimensions in Eqs. (5, 6); or state that delta x and delta h are velocities (?)

4) Table 1, 90-220 m Q_{ex}: 2.8ex10^8 -> 2.8x10^8  

5) L273: cie shelf  ->  ice shelf.

References

Hill et al., 2017: A Review of Recent Changes in Major Marine-Terminating Outlet Glaciers in Northern Greenland. doi: 10.3389/feart.2016.00111

Jakobsson et al., 2020: Ryder Glacier in north-west Greenland is shielded from warm Atlantic water by a bathymetric sill. doi: 10.1038/s43247-020-00043-0

Nilsson et al., 2023: Hydraulic suppression of basal glacier melt in sill fjords. doi.org/10.5194/tc-17-2455-2023