Which consequence results when glacial melt destabilizes permafrost earthflows bordering thermokarst lakes?

💡 Explanation

Increased methane ebullition occurs because permafrost thaw allows decomposition; the mechanism is microbial methanogenesis; therefore more methane is released from the lake sediment rather than less heat flux occurring.

• Which risk increases when cave stalactite drip-rates exceed evaporation?
• Under what circumstance would significant overwash initiate barrier island migration?
• Which landscape feature strongly correlates with loess deposition?
• Which risk increases when a levee, constructed from cohesive soil, is rapidly saturated by floodwater?
• Which process causes the formation of a volcanic arc when oceanic lithosphere subducts beneath continental lithosphere?
• Which outcome results when a meandering stream's outer bank experiences persistent erosion due to shifts in groundwater flow?