What question did this study set out to answer?

This study aims to critically evaluate existing friction laws governing glacier dynamics and propose new frameworks for understanding ice motion.

January 1, 1979Journal of GlaciologyOpen Access

Local Friction Laws for Glaciers: A Critical Review and New Openings

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Critical review identifies key friction laws affecting glacier sliding dynamics, suggesting new models for ice-bedrock interactions.

This study aims to critically evaluate existing friction laws governing glacier dynamics and propose new frameworks for understanding ice motion.
Introduces different scales for analyzing glacier dynamics.
Discusses existing models of ice rheology and subglacial water dynamics.
Provides a new friction law based on irregular bedrock features and their impact on sliding.
Identifies significant errors in Weertman's double-valued friction law.
Proposes that an added term increasing with effective pressure must be included in drag calculations.
Establishes that shadowing function is a more relevant measure of bedrock roughness than spectral power density.

Louis Lliboutry (1979) studied this question.

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