Which process accelerates when permafrost underlying a cirque thaws due to rising air temperatures?

💡 Explanation

When permafrost thaws, the freeze-thaw weathering cycle intensifies because previously frozen rocks become unstable, leading to increased rockfall frequency on steep cirque walls. Therefore rockfall increases results, rather than decreased erosion or slope and vegetation stabilization, which require a stable permafrost or different geological processes.

• Which outcome follows the construction of structures on gradients affected by solifluction?
• Which process creates an alluvial fan when a high-gradient stream flows onto a valley floor with reduced slope?
• Which effect accelerates solifluction on Arctic slopes following permafrost thaw due to rising temperatures?
• Which mechanism causes increased rockfall within cirques undergoing thaw?
• Which mechanism exacerbates flood risk when constructing buildings within an alluvial fan?
• Which mechanism is triggered when differential stress exceeds static friction along an existing fault line?