Alpine topography of the Gamburtsev Subglacial Mountains, Antarctica, mapped from ice sheet surface morphology

Lea, Edmund J.; Jamieson, Stewart S. R.; Bentley, Michael J.

doi:https://doi.org/10.5194/tc-18-1733-2024

Articles | Volume 18, issue 4

https://doi.org/10.5194/tc-18-1733-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Icy landscapes of the past (CP/ESSD/ESurf/TC inter-journal...

https://doi.org/10.5194/tc-18-1733-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 4

Research article

|

12 Apr 2024

Research article |

| 12 Apr 2024

Alpine topography of the Gamburtsev Subglacial Mountains, Antarctica, mapped from ice sheet surface morphology

Edmund J. Lea, Stewart S. R. Jamieson, and Michael J. Bentley

Supplement

https://doi.org/10.5194/tc-18-1733-2024-supplement

Data sets

Mapping outputs Edmund J. Lea https://doi.org/10.5281/zenodo.10550538

BEDMAP2 - Ice thickness, bed and surface elevation for Antarctica - gridding products (Version 1.0) P. Fretwell et al. https://doi.org/10.5285/fa5d606c-dc95-47ee-9016-7a82e446f2f2

MEaSUREs BedMachine Antarctica M. Morlighem https://doi.org/10.5067/FPSU0V1MWUB6

The Reference Elevation Model of Antarctica (https://www.pgc.umn.edu/data/rema/) I. M. Howat et al. https://doi.org/10.5194/tc-13-665-2019

RAMP AMM-1 SAR Image Mosaic of Antarctica K. Jezek et al. https://doi.org/10.5067/8AF4ZRPULS4H

Antarctica's Gamburtsev Province (AGAP) Project - Radio-echo sounding data (2007-2009) H. Corr et al. https://doi.org/10.5285/0F6F5A45-D8AF-4511-A264-B0B35EE34AF6

Model code and software

ArcGIS toolbox Edmund J. Lea https://doi.org/10.5281/zenodo.10550538

Short summary

We use the ice surface expression of the Gamburtsev Subglacial Mountains in East Antarctica to map the horizontal pattern of valleys and ridges in finer detail than possible from previous methods. In upland areas, valleys are spaced much less than 5 km apart, with consequences for the distribution of melting at the bed and hence the likelihood of ancient ice being preserved. Automated mapping techniques were tested alongside manual approaches, with a hybrid approach recommended for future work.