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Surging Glaciers 2 (Austfonna Change 1998 - 2014 (= Surge phase, 1.…
Surging Glaciers 2
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Thermal surge mechanism
- Slow ice flow ∴ glacier thickens & insulates bed
- Geothermal heating @ bed causes melt
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- Surge ceases when glacier thins & bed freezes
Thermal
surging
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e.g. Trapridge Glacier, Alaska
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Thermal
front
Wetted, melted front moves through glacier
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