Derivation of bedrock topography measurement requirements for the reduction of uncertainty in ice-sheet model projections of Thwaites Glacier

Castleman, Blake A.; Schlegel, Nicole-Jeanne; Caron, Lambert; Larour, Eric; Khazendar, Ala

doi:https://doi.org/10.5194/tc-16-761-2022

Articles | Volume 16, issue 3

https://doi.org/10.5194/tc-16-761-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/tc-16-761-2022

© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 3

Research article

|

08 Mar 2022

Research article |

| 08 Mar 2022

Derivation of bedrock topography measurement requirements for the reduction of uncertainty in ice-sheet model projections of Thwaites Glacier

Blake A. Castleman, Nicole-Jeanne Schlegel, Lambert Caron, Eric Larour, and Ala Khazendar

Supplement

https://doi.org/10.5194/tc-16-761-2022-supplement

Data sets

MEaSUREs BedMachine Antarctica, Version 2 M. Morlighem https://doi.org/10.5067/E1QL9HFQ7A8M

Model code and software

Ice-sheet and Sea-level System Model JPL Sea Level and Ice Group https://issm.jpl.nasa.gov/

Thwaites Glacier bedrock topography measurement requirement characterization code Blake A. Castleman https://doi.org/10.5281/zenodo.6325925

Short summary

In the described study, we derive an uncertainty range for global mean sea level rise (SLR) contribution from Thwaites Glacier in a 200-year period under an extreme ocean warming scenario. We derive the spatial and vertical resolutions needed for bedrock data acquisition missions in order to limit global mean SLR contribution from Thwaites Glacier to ±2 cm in a 200-year period. We conduct sensitivity experiments in order to present the locations of critical regions in need of accurate mapping.