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Geography

Which outcome occurs when a permafrost thaw destabilizes riverbanks along Arctic streams?

A)Increased turbidity in fish spawning grounds
B)Reversal of regional adiabatic lapse rate
C)Regional atmospheric pressure gradient reversal
D)Decreased latent heat fluxes from evaporation

💡 Explanation

Increased turbidity can occur when permafrost thaw enhances soil erosion and stream sedimentation due to riverbank destabilization, because colluvial material is entering the water. Therefore, turbidity increases rather than climatic feedbacks, because they result from altered thermal dynamics.

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