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Case study ­ Canadian Wilderness
Activity Time Sustainability Evaluation

Traditional Life:
The few people that lived there were a 100% dependent on the environment. As it provided them for a place to hunt, gather food and
farm. As the settlements were very old, they had developed sustainably…

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Glacial Trough
From 1km to 50k long, and 0.5km to 3km wide
Generally straight due to the ice is inflexibility (creates bigger creavesses)
Steep sides and flat floor, with truncated spurs
Base occupied by alluvium deposit, and possible misfit fiver or roches moutannees
Hanging valleys, with waterfalls to…

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Sublimation ­ where the air turns in to ice crystals

GLACIAL BUDGET - is the balance between accumulation and ablation over the year. It can help determine whether the glacier is retreating
(decrease in budget so moves backwards) or advancing (increase in budget so moves forward)…

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Arctic Circle 66.6oc In a ice age, the ice advances from the poles towards the equator. And also cold comes
down from high mountains to lower ground
Antarctic Circle 66.6oc Not in a ice age, the ice retreats going back to the poles. And also the cold rises
back up…

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Alpine Environments
They are the area where glaciers form, mostly above the tree line
There is less air per cubic meter, in a higher altitude so therefore less heat.
As heat can be trapped in thick particuled air, and air particles are sparser at altitude
Himalayas, Karakoram, Andes, Rockies, Alps,…

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Warmer regions, where temperatures cannot penetrate so deep. Discontinuous because, it does not happen
near lakes and rivers.
Sporadic frost -1oc to 0oc
Temperatures are around freezing, so it can only occur in isolated spots

Depends on:
Air temperature
Moisture in the ground ­ drainage and saturation
Sunlight to heat…


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