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8 Cards in this Set
- Front
- Back
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Ice age |
An ice age is a period of long term reduction in the earths surface temperature. |
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Glacial |
These are periods of very cold and dry climate during which large land and sea ice masses grow and valley glaciers extend to lower levels. The last glacial ended over 10,000 years ago. |
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Interglacial |
Warmer periods during which the extent of ice masses and valley glaciers begin to retreat. We are currently in an interglacial period known as the Holocene. |
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Positive mass balance |
Accumulation > ablation. This results in the glacier advancing. |
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Positive mass balance |
Accumulation > ablation. This results in the glacier advancing. |
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Negative mass balance |
Ablation > accumulation. Results in glacier retreating. (Normally occurs in spring/summer) |
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Positive mass balance |
Accumulation > ablation. This results in the glacier advancing. (Normally occurs in winter) |
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Equilibrium |
Accumulation = ablation. Remains stable in position. |
