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Updated: Mar 31, 2026

Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
Published on: August 5, 2016
Physical processes causing the formation of penitentes
P Claudin1, H Jarry1, G Vignoles2
1Laboratoire de Physique et Mécanique des Milieux Hétérogènes, PMMH UMR 7636 ESPCI, CNRS, University Paris Diderot, University Pierre et Marie Curie, 10 rue Vauquelin, 75005, Paris, France.
Abstract:
Snow penitentes form in sublimation conditions by differential ablation. Here we investigate the physical processes at the initial stage of penitente growth and perform the linear stability analysis of a flat surface submitted to the solar heat flux. We show that these patterns do not simply result from the self-illumination of the surface-a scale-free process-but are primarily controlled by vapor diffusion and heat conduction. The wavelength at which snow penitentes emerge is derived and discussed. We found that it is controlled by aerodynamic mixing of vapor above the ice surface.
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