Objectives<br />You should understand how ice forms.<br />You should consider how a glacier operates as a system.<br />
Rank the 5 factors in the order with which you think they are responsible for cycles of glaciation and interglacials<br />...
Questions from your reading?<br />
Diagrams from text – I read, you draw!<br />
Alaskan Valley Glacier<br />
How could a glacier be viewed as a system?<br />Outputs<br />INPUTS<br />Transfers<br />Stores<br />Is this an open or a c...
Describe and explain the patterns on the graph below.<br />
How this translates into the glacial system<br />Label your diagram<br />What do the terms net accumulation zone and net a...
Review – have a go at the “Assessment on glacial Budgets” sheet <br />
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4.glacial systems

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4.glacial systems

  1. 1. Objectives<br />You should understand how ice forms.<br />You should consider how a glacier operates as a system.<br />
  2. 2. Rank the 5 factors in the order with which you think they are responsible for cycles of glaciation and interglacials<br />Changes in the earth’s position in space, its orbit and tilt<br />Variations in sunspot activity, changing the amount of solar radiation received by the Earth<br />Changes in the amount of volcanic dust affecting the amount of radiation reflected and trapped by the atmosphere<br />Trapping of CO2 by the oceans <br />Variations in ocean currents<br />
  3. 3. Questions from your reading?<br />
  4. 4. Diagrams from text – I read, you draw!<br />
  5. 5. Alaskan Valley Glacier<br />
  6. 6. How could a glacier be viewed as a system?<br />Outputs<br />INPUTS<br />Transfers<br />Stores<br />Is this an open or a closed system?<br />
  7. 7. Describe and explain the patterns on the graph below.<br />
  8. 8.
  9. 9. How this translates into the glacial system<br />Label your diagram<br />What do the terms net accumulation zone and net ablation zone mean?<br />What is meant by the term Net Glacial Balance?<br />How might this vary over time?<br />How might this vary with location?<br />
  10. 10.
  11. 11. Review – have a go at the “Assessment on glacial Budgets” sheet <br />

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