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← GeographyWhich volcanic hazard leads to increased rates of glacial ice melt during a subglacial eruption?
A)Pyroclastic flow propagation
B)Tephra deposition lowering albedo✓
C)Lahar generation from flank collapse
D)Volcanic gas release increasing RF
💡 Explanation
When a subglacial eruption occurs, tephra is deposited onto the glacier surface, which lowers the albedo because the darker ash absorbs more solar radiation, increasing surface melt rates. Therefore depositing tephra leads to glacial ice loss, rather than other volcanic hazards directly melting ice.
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