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Geography

Which outcome occurs when glacial meltwater floods supraglacial lakes atop ice sheets?

A)Accelerated glacial calving velocity events
B)Increased albedo from exposed sediment
C)Decreased isostatic rebound in the region
D)Reduced thermohaline circulation intensity

💡 Explanation

Accelerated glacial calving of velocity events results because hydrofracturing weakens the ice, as water drains through crevasses via positive feedback. This undercutting rapidly destabilizes glacial fronts; therefore, calving speed increases, rather than enhanced albedo caused by widespread flooding.

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