Which increased geohazard results as permafrost temperatures rise?

💡 Explanation

A rise in temperature causes thawing permafrost, leading to thermokarst. This thaw weakening is an example of thermal degradation as the soil loses structural integrity; therefore infrastructure will become more unstable rather than stabilized by colder soils.

• Which risk increases when vegetation diminishes along stream banks?
• Which outcome occurs within karst systems dominated by limestone when increased rainwater acidity accelerates mineral decomposition?
• Which erosional pattern develops when a retreating glacier carves a U-shaped valley subsequently flooded by the sea?
• Which outcome is worsened by thermocline breakdown during upwelling?
• Which erosional outcome significantly reduces mangrove forest extent?
• Which outcome occurs when rapid tectonic uplift increases erosion rates in an arid mountain range forming an alluvial fan?