Articles | Volume 16, issue 4
Model evaluation paper
24 Feb 2023
Model evaluation paper |  | 24 Feb 2023

Modeling large‐scale landform evolution with a stream power law for glacial erosion (OpenLEM v37): benchmarking experiments against a more process-based description of ice flow (iSOSIA v3.4.3)

Moritz Liebl, Jörg Robl, Stefan Hergarten, David Lundbek Egholm, and Kurt Stüwe

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Cited articles

Alley, R. B., Cuffey, K. M., and Zoet, L. K.: Glacial erosion: status and outlook, Ann. Glaciol., 60, 1–13,, 2019. a, b
Anderson, R. S., Molnar, P., and Kessler, M. A.: Features of glacial valley profiles simply explained, J. Geophys. Res.-Earth, 111, F01004,, 2006. a
Bahr, D. B.: Width and length scaling of glaciers, J. Glaciol., 43, 557–562,, 1997. a
Bernard, M., Steer, P., Gallagher, K., and Egholm, D. L.: The Impact of Lithology on Fjord Morphology, Geophys. Res. Lett., 48, e2021GL093101,, 2021. a, b, c
Brædstrup, C. F., Egholm, D. L., Ugelvig, S. V., and Pedersen, V. K.: Basal shear stress under alpine glaciers: insights from experiments using the iSOSIA and Elmer/Ice models, Earth Surf. Dynam., 4, 159–174,, 2016. a, b, c, d, e, f, g
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In this study, we benchmark a topography-based model for glacier erosion (OpenLEM) with a well-established process-based model (iSOSIA). Our experiments show that large-scale erosion patterns and particularly the transformation of valley length geometry from fluvial to glacial conditions are very similar in both models. This finding enables the application of OpenLEM to study the influence of climate and tectonics on glaciated mountains with reasonable computational effort on standard PCs.