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ISMIP7 Antarctic Ocean Melt Calibration · ISMIP · Source Cooperative | Source Cooperative

ISMIP7 Antarctic Ocean Melt Calibration

Name: ISMIP7 Antarctic Ocean Melt Calibration
Creator: ISMIP

Data for calibrating sub-ice-shelf melt parameterisations for ISMIP7 Antarctic experiments: ocean model output, hydrographic observations, observational estimates of melt rates, buttressing flux response numbers, drainage basins and ice-shelf masks, and the meltMIP intercomparison inputs. Third-party model output and observations from several groups, each with its own citation and licence — see the per-dataset attribution in the product README.

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Visibility: Public
Owner: ISMIP
Created: 11 Sep 2026
Last Updated: 11 Sep 2026

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README

ISMIP7 Antarctic ocean melt calibration data

Data for calibrating sub-ice-shelf melt parameterisations for the ISMIP7 Antarctic experiments, collected by the ISMIP7 AIS ocean focus group. The datasets are described in the AIS ocean protocol presentations (November 2025, Copenhagen March 2026, EGU 2026) and the ISMIP7 Protocol Cheat Sheet, and are used by the focus group's calibration toolbox.

Most of what is here is third-party ocean-model output and observations, redistributed with the permission of the groups who produced it. Each dataset carries its own licence and citation. The table below gives the licence for every directory; each directory also has a README.md with the full citation for every file in it. The licence texts are in LICENSES/.

Directory	Contents	Licence
`ocean_modelling_data/`	Ocean-model temperature, salinity, thermal forcing and melt rates for "cold" and "warm" cavity states, from five modelling groups, plus the derived calibration targets (term 3)	CC-BY-4.0 for Mathiot, Jourdain, Timmermann and Haid; CC-BY-NC-4.0 for Naughten and for files that combine Naughten output with other models — see the directory README
`ocean_observations_data/`	Amundsen Sea hydrographic sections from the MISOMIP2 MIPkit-A, on the ISMIP7 8 km / 60 m grid, plus the derived calibration target (term 4)	Compiled from cruise data of several institutes; see the directory README for provenance
`meltobs/`	Observed basal melt rates per IMBIE2 basin from Paolo et al. (2023), Davison et al. (2023) and Adusumilli et al. (2020), plus the derived calibration target (term 2)	CC-BY-4.0 for Davison and Adusumilli; Paolo et al. is a NASA MEaSUREs product with no licence stated
`imbie2/`	IMBIE2 drainage-basin numbers on the ISMIP7 grids, from the MEaSUREs Antarctic Boundaries dataset	NASA MEaSUREs product, no licence stated; cite Mouginot et al. (2017)
`bfrns/`	Buttressing-flux-response numbers of Reese et al. (2018) on the ISMIP7 grids	CC-BY-4.0
`floatingmasks/`	Floating-ice masks on the ISMIP7 grids, derived from Bedmap3

The ISMIP7-produced files (the melt_*_target_term*.nc calibration targets, the regridded masks) are derivatives of the datasets above and are shared under the same terms as their sources; where a source is CC-BY-NC-4.0 the derivative is too.

Citing

Please cite the original dataset for anything you use from here — the citations are in each directory's README.md — and the ISMIP7 AIS ocean protocol paper (submitted to The Cryosphere, 2026) for the calibration method.

Licences

LICENSES/CC-BY-4.0.txt — Creative Commons Attribution 4.0 International, https://creativecommons.org/licenses/by/4.0/
LICENSES/CC-BY-NC-4.0.txt — Creative Commons Attribution-NonCommercial 4.0 International, https://creativecommons.org/licenses/by-nc/4.0/

Contact

ISMIP7 AIS ocean focus group, via the ISMIP discussion board: https://github.com/orgs/ismip/discussions

README

ISMIP7 Antarctic ocean melt calibration data

Directory	Contents	Licence
`ocean_modelling_data/`	Ocean-model temperature, salinity, thermal forcing and melt rates for "cold" and "warm" cavity states, from five modelling groups, plus the derived calibration targets (term 3)	CC-BY-4.0 for Mathiot, Jourdain, Timmermann and Haid; CC-BY-NC-4.0 for Naughten and for files that combine Naughten output with other models — see the directory README
`ocean_observations_data/`	Amundsen Sea hydrographic sections from the MISOMIP2 MIPkit-A, on the ISMIP7 8 km / 60 m grid, plus the derived calibration target (term 4)	Compiled from cruise data of several institutes; see the directory README for provenance
`meltobs/`	Observed basal melt rates per IMBIE2 basin from Paolo et al. (2023), Davison et al. (2023) and Adusumilli et al. (2020), plus the derived calibration target (term 2)	CC-BY-4.0 for Davison and Adusumilli; Paolo et al. is a NASA MEaSUREs product with no licence stated
`imbie2/`	IMBIE2 drainage-basin numbers on the ISMIP7 grids, from the MEaSUREs Antarctic Boundaries dataset	NASA MEaSUREs product, no licence stated; cite Mouginot et al. (2017)
`bfrns/`	Buttressing-flux-response numbers of Reese et al. (2018) on the ISMIP7 grids	CC-BY-4.0
`floatingmasks/`	Floating-ice masks on the ISMIP7 grids, derived from Bedmap3

Citing

Licences

LICENSES/CC-BY-4.0.txt — Creative Commons Attribution 4.0 International, https://creativecommons.org/licenses/by/4.0/
LICENSES/CC-BY-NC-4.0.txt — Creative Commons Attribution-NonCommercial 4.0 International, https://creativecommons.org/licenses/by-nc/4.0/

Contact

ISMIP7 AIS ocean focus group, via the ISMIP discussion board: https://github.com/orgs/ismip/discussions