Nunataks as barriers to ice flow: implications for palaeo ice sheet reconstructions

Mas e Braga, Martim; Selwyn Jones, Richard; Newall, Jennifer C. H.; Rogozhina, Irina; Andersen, Jane L.; Lifton, Nathaniel A.; Stroeven, Arjen P.

doi:https://doi.org/10.5194/tc-15-4929-2021

Articles | Volume 15, issue 10

https://doi.org/10.5194/tc-15-4929-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/tc-15-4929-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 15, issue 10

Research article

|

25 Oct 2021

Research article |

| 25 Oct 2021

Nunataks as barriers to ice flow: implications for palaeo ice sheet reconstructions

Martim Mas e Braga, Richard Selwyn Jones, Jennifer C. H. Newall, Irina Rogozhina, Jane L. Andersen, Nathaniel A. Lifton, and Arjen P. Stroeven

Supplement

https://doi.org/10.5194/tc-15-4929-2021-supplement

Model code and software

GHilmarG/UaSource: Ua2019b H. Gudmundsson https://doi.org/10.5281/zenodo.3706624

Model configuration files for Mas e Braga et al. (2021), ``Nunataks as barriers to ice flow: implications for palaeo ice sheet reconstructions M. Mas e Braga https://doi.org/10.5281/zenodo.5583987

Short summary

Mountains higher than the ice surface are sampled to know when the ice reached the sampled elevation, which can be used to guide numerical models. This is important to understand how much ice will be lost by ice sheets in the future. We use a simple model to understand how ice flow around mountains affects the ice surface topography and show how much this influences results from field samples. We also show that models need a finer resolution over mountainous areas to better match field samples.