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Geography

What outcome occurs when substantial tephra deposition blankets temperate glaciers?

A)Accelerated glacial melt occurs
B)Glacier calving rate stabilizes
C)Firn formation rate accelerates
D)Basal sliding speed decreases sharply

💡 Explanation

Glacial melt accelerates as dark tephra lowers the albedo locally; therefore, increased solar radiation is absorbed rather than reflected via increased surface darkening, because meltwater production from lowered albedo increases ablation.

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