Which geomorphic outcome is accelerated when rising temperatures thaw subglacial permafrost beneath alpine glaciers?

💡 Explanation

When subglacial permafrost thaws, saturation decreases effective stress because basal lubrication increases, leading to higher sliding rates. Therefore glacial basal sliding is increased, rather than reduced ablation, enhanced loess deposition, or decreased rebound which require distinct processes such as changes in surface albedo or surface uplift post-glacial melt.

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