Preprints
https://doi.org/10.5194/egusphere-2023-2546
https://doi.org/10.5194/egusphere-2023-2546
10 Nov 2023
 | 10 Nov 2023

Biases in ice sheet models from missing noise-induced drift

Alexander Robel, Vincent Verjans, and Aminat Ambelorun

Abstract. Most climatic and glaciological processes exhibit internal variability, which is omitted from many ice sheet model simulations. Prior studies have found that climatic variability can change ice sheet mean state. We show in this study that variability in frontal ablation of marine-terminating glaciers changes the mean state of the Greenland Ice Sheet through noise-induced drift. Idealized simulations and theory show that noise-induced bifurcations and nonlinearities in variable ice sheet processes are likely the cause of the noise-induced drift in marine ice sheet dynamics. The lack of such noise-induced drift in spinup and transient ice sheet simulations is a potentially omnipresent source of bias in ice sheet models.

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Journal article(s) based on this preprint

31 May 2024
Biases in ice sheet models from missing noise-induced drift
Alexander A. Robel, Vincent Verjans, and Aminat A. Ambelorun
The Cryosphere, 18, 2613–2623, https://doi.org/10.5194/tc-18-2613-2024,https://doi.org/10.5194/tc-18-2613-2024, 2024
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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

Short summary
The average size of many glaciers and ice sheets changes when noise is added to the system. The...
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