Which risk increases when volcanic tephra accumulates on glaciers?

💡 Explanation

Glacial melting increases from tephra deposits due to albedo reduction; darkening the ice causes sunlight absorption, increasing surface temperature via radiative forcing. Therefore, enhanced ablation occurs, because warming far exceeds the effect caused by surface insulation, rather than suppressed drainage.

• Which increased risk occurs to structures founded atop loess deposits during prolonged saturation events?
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