Article Dans Une Revue Physical Review Letters Année : 2021

Onset of Glacier Tables

Marceau Hénot
Nicolas Plihon
Nicolas Taberlet

Résumé

A glacier table consists of a rock supported by a slender column of ice and form naturally on glaciers. We investigate the onset of their formation at a smaller scale in a controlled environment. Depending on the size and thermal conductivity of a cap, it can either form of a table standing on an ice foot, or sink into the ice block. A one-dimension conduction model shows that the differential ice melting is controlled by a competition between two effects: a geometrical amplification, and a heat flux reduction due to the higher temperature of the cap as compared to the ice. Our model captures the transition between the two regimes and identifies a dimensionless number which controls the onset of glacier tables formation.
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hal-04927496 , version 1 (03-02-2025)

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Marceau Hénot, Nicolas Plihon, Nicolas Taberlet. Onset of Glacier Tables. Physical Review Letters, 2021, 127 (10), pp.108501. ⟨10.1103/PhysRevLett.127.108501⟩. ⟨hal-04927496⟩

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