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Basal Slippage
The document outlines the process of ice sheet formation and movement in 4 steps: 1) snowfall accumulates and compresses to form an ice sheet, 2) pressure causes basal melt, 3) the lubricated ice sheet moves via basal slippage due to gravity, 4) the ice sheet flows out to sea forming an ice shelf, which periodically calves icebergs in summer. The reader is instructed to copy the diagram as it progresses through each step, swapping sheets with a partner between diagrams.
Basal Slippage
- 1. Divide your A3sheet into four. Copy the sketch diagram as it progresses. When prompted , swop your sheet with a partner and begin a new diagram on a new section of the A3 sheet. The process will increase in speed with each diagram.
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- 10. Snow fall Accumulatesand compresses – ice sheet
- 11. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt.
- 12. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage .
- 13. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage . Ice sheet flow out onto the sea- ice shelf.
- 14. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage . Ice sheet flow out onto the sea- ice shelf. Calving occurs in summer Iceberg
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- 23. Snow fall Accumulatesand compresses – ice sheet
- 24. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt.
- 25. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage .
- 26. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage . Ice sheet flow out onto the sea- ice shelf.
- 27. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage . Ice sheet flow out onto the sea- ice shelf. Calving occurs in summer Iceberg
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- 36. Snow fall Accumulatesand compresses – ice sheet
- 37. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt.
- 38. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage .
- 39. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage . Ice sheet flow out onto the sea- ice shelf.
- 40. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage . Ice sheet flow out onto the sea- ice shelf. Calving occurs in summer Iceberg
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- 49. Snow fall Accumulatesand compresses – ice sheet
- 50. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt.
- 51. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage .
- 52. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage . Ice sheet flow out onto the sea- ice shelf.
- 53. Snow fall Accumulatesand compresses – ice sheet Pressure causes basal melt. Ice sheet moves-Lubricated due to basal melt and gravity- basal slippage . Ice sheet flow out onto the sea- ice shelf. Calving occurs in summer Iceberg
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