Which mechanical process accelerates destabilization of Arctic building foundations when surface insulation degrades, triggering active layer detachments?

💡 Explanation

When surface insulation degrades, permafrost thaw increases active layer thickness. Solifluction (the slow downslope movement of saturated soil) then occurs because thawed soil loses shear strength. Therefore, solifluction lobe formation destabilizes foundations, rather than cryostatic pressure, carbon liberation, or contraction cracking which impact permafrost stability through different mechanisms.

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