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Glaciers

Glaciers. Hydrology Daren Blanck, MS. Glacier: a Flowing Stream of Ice. Mountain Continental (Ice Sheets) . Snowfall vs Melting. Zone of Accumulation Snowfall Exceeds Melting & Sublimation (Ablation) Excess Snow Turns to Ice & Flows Out Zone of Melting (Ablation)

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Glaciers

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  1. Glaciers Hydrology Daren Blanck, MS

  2. Glacier: a Flowing Stream of Ice • Mountain • Continental (Ice Sheets)

  3. Snowfall vs Melting Zone of Accumulation • Snowfall Exceeds Melting & Sublimation (Ablation) • Excess Snow Turns to Ice & Flows Out Zone of Melting (Ablation) • Ablation Exceeds Snowfall • Melting Excess Made up by Ice Flowing in Terminus of Glacier • Snowfall & Inflow = Ablation

  4. Anatomy of a Glacier

  5. Flow Glaciers flow due to Gravity and Internal deformation

  6. Crevasse Diagrams

  7. A Typical Glacial Advance and Retreat

  8. As long as Accumulation = Ablation, the Glacier Front Remains Fixed

  9. If Accumulation Exceeds Ablation, the Glacier Advances

  10. If Ablation Exceeds Accumulation, the Glacier Retreats

  11. Eventually, Material Trapped in the Ice Reaches the Terminus

  12. A Typical Glacial Advance and Retreat

  13. Abrasion Polish Striations Chatter Marks Crescentic Gouges Bedrock Scour Results of Glaciation

  14. Results of Glaciation Deposition • Till/Morraine • Erratics • Outwash

  15. < Glacial Ice Formation Glacial Erosion > Animations

  16. Mountain Glacier Landforms

  17. Continental Glacier Landforms

  18. North American Glaciation 1) Nebraskan 2) Kansan 3) Illinoisian 4) Wisconsin

  19. Glacial Melt Cascade Glacier - Alaska

  20. Glacial Melt Bolivia

  21. Kilimanjaro 1985-2002

  22. Greenland Ice Cap

  23. Antarctic Ice Cap

  24. Antarctic Subglacial Lakes

  25. Lake Vostok

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