Name: ISMIP7 Antarctic Observational Datasets
Creator: ISMIP

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ISMIP7 observations MIPkit for Antarctica

AntarcticaObsISMIP7-v1.2.nc (v1.2, 12 May 2026), compiled by Mathieu Morlighem on behalf of the ISMIP7 observations group. One file, 500 m polar-stereographic grid (EPSG:3031), with the sources below recorded in each variable's source attribute.

The file states license: No restrictions on access or use. It will receive a DOI and be presented in a publication; for the current guidance on citing or acknowledging it, see https://www.ismip.org/participants/focus-groups/observations. Please also cite the original dataset for each variable you use.

Contents and sources

Variables	Source
`mask_bedmachine`, `surface_bedmachine`, `thickness_bedmachine`, `bed_bedmachine`	BedMachine Antarctica v4.1 (Morlighem et al., 2020)
`mask_bedmap3`, `surface_bedmap3`, `thickness_bedmap3`, `bed_bedmap3`	Bedmap3 (Pritchard et al., 2025) — CC-BY-4.0
`icemask_greene`	Ice-presence mask, Greene et al. (2022)
`dhdt_smith`	Thickness change from ICESat and ICESat-2, Smith et al. (2020)
`dhdt_cpom`	Thickness change from radar altimetry (ERS-1, ERS-2, Envisat, CryoSat-2, Sentinel-3A/B), CPOM
`geothermal_heat_flux1`	Stål et al. (2021)
`geothermal_heat_flux2`	Lösing and Ebbing (2021)
`vx_mosaic`, `vy_mosaic`	MEaSUREs InSAR-based Antarctica ice velocity map, version 2 (Rignot et al., 2017)
`vx_timeseries`, `vy_timeseries`	Annual velocity time series (source not recorded in the file)

Citations

Morlighem, M. et al. (2020). Deep glacial troughs and stabilizing ridges unveiled beneath the margins of the Antarctic ice sheet. Nature Geoscience, 13, 132–137. https://doi.org/10.1038/s41561-019-0510-8

Pritchard, H. D. et al. (2025). Bedmap3 updated ice bed, surface and thickness gridded datasets for Antarctica. Scientific Data, 12, 414. https://doi.org/10.1038/s41597-025-04672-y

Greene, C. A., Gardner, A. S., Schlegel, N.-J. and Fraser, A. D. (2022). Antarctic calving loss rivals ice-shelf thinning. Nature, 609, 948–953. https://doi.org/10.1038/s41586-022-05037-w

Smith, B. et al. (2020). Pervasive ice sheet mass loss reflects competing ocean and atmosphere processes. Science, 368, 1239–1242. https://doi.org/10.1126/science.aaz5845

Stål, T., Reading, A. M., Halpin, J. A. and Whittaker, J. M. (2021). Antarctic geothermal heat flow model: Aq1. Geochemistry, Geophysics, Geosystems, 22, e2020GC009428. https://doi.org/10.1029/2020GC009428

Lösing, M. and Ebbing, J. (2021). Predicting geothermal heat flow in Antarctica with a machine learning approach. Journal of Geophysical Research: Solid Earth, 126, e2020JB021499. https://doi.org/10.1029/2020JB021499

Rignot, E., Mouginot, J. and Scheuchl, B. (2017). MEaSUREs InSAR-Based Antarctica Ice Velocity Map, Version 2 [Data set]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/D7GK8F5J8M8R

Mouginot, J., Scheuchl, B. and Rignot, E. (2017). MEaSUREs Antarctic Boundaries for IPY 2007–2009 from Satellite Radar, Version 2 [Data set]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/AXE4121732AD