The Cryosphere
The Cryosphere
TC
Articles | Volume 19, issue 1
Articles | Volume 19, issue 1
https://doi.org/10.5194/tc-19-107-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-19-107-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 1
Research article
 | 
10 Jan 2025
Research article |  | 10 Jan 2025

Modelling GNSS-observed seasonal velocity changes of the Ross Ice Shelf, Antarctica, using the Ice-sheet and Sea-level System Model (ISSM)

Francesca Baldacchino, Nicholas R. Golledge, Mathieu Morlighem, Huw Horgan, Alanna V. Alevropoulos-Borrill, Alena Malyarenko, Alexandra Gossart, Daniel P. Lowry, and Laurine van Haastrecht

Data sets

MEaSUREs BedMachine Antarctica. (NSIDC-0756, Version 3) M. Morlighem https://doi.org/10.5067/FPSU0V1MWUB6

MEaSUREs InSAR-Based Antarctica Ice Velocity Map (NSIDC-0484, Version 2) E. Rignot et al. https://doi.org/10.5067/D7GK8F5J8M8R

Ross Ice Shelf GNSS data reported in EGUSphere-2023-2793, Baldacchino et al., 2024 H. J. Horgan https://doi.org/10.5281/zenodo.14134876

Continental scale, high order, high spatial resolution, ice sheet modeling using the Ice Sheet System Model (https://issm.jpl.nasa.gov) E. Larour et al. https://doi.org/10.1029/2011JF002140

Data set: Yearly RACMO2.3p2 variables J. M. van Wessem et al. https://doi.org/10.5281/zenodo.6602723

Model code and software

Modelling GNSS-observed seasonal velocity changes of the Ross Ice Shelf, Antarctica, using the Ice-sheet and Sea-level System Model (ISSM) F. Baldacchino https://doi.org/10.5281/zenodo.11098089

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Short summary
Understanding how the Ross Ice Shelf flow is changing in a warming world is important for predicting ice sheet change. Field measurements show clear intra-annual variations in ice flow; however, it is unclear what mechanisms drive this variability. We show that local perturbations in basal melt can have a significant impact on ice flow speed, but a combination of forcings is likely driving the observed variability in ice flow.
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