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← GeographyWhich impact results as melting permafrost destabilizes slopes subjected to annual freeze-thaw cycles accelerating solifluction?
A)Increased sediment flux to rivers✓
B)Reduced carbon sequestration capacity
C)Enhanced thermokarst lake expansion
D)Decreased soil nutrient availability
💡 Explanation
When permafrost thaws, saturated soil loses shear strength during freeze-thaw, leading to accelerated solifluction because of reduced cohesion and increased downslope movement. Therefore increased sediment flux results, rather than altering carbon storage directly, impacting thermokarst lakes solely, or affecting nutrient availability pathways.
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