A note on the snout

A note on the snout

The shallow ice approximation for glaciers and ice sheets is a degenerate model in which the ice surface slope at the margin may be infinite. This result is due to the neglect of the otherwise small longitudinal stress terms. Here we derive a corrected approximation for the basal shear stress, and s...

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Veröffentlicht in:Journal of glaciology 2023-02, Vol.69 (273), p.211-216
1. Verfasser: Fowler, A.C.
Format: Artikel
Sprache:eng
Schlagworte:
Approximation
Boundary conditions
Glaciation
Glacier flow
glacier fluctuations
glacier modelling
Glaciers
Ice
Ice sheets
Mathematical analysis
Shear stress
Slopes
Velocity
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Beschreibung
Zusammenfassung:The shallow ice approximation for glaciers and ice sheets is a degenerate model in which the ice surface slope at the margin may be infinite. This result is due to the neglect of the otherwise small longitudinal stress terms. Here we derive a corrected approximation for the basal shear stress, and show that the resulting model provides an explanation for the observed finite slope margins.
ISSN:0022-1430
1727-5652
DOI:10.1017/jog.2022.36