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120040
Athabasca Glacier
Description
Geography (Case Studies) Mind Map on Athabasca Glacier, created by sinjinibasu.sb on 02/06/2013.
No tags specified
case studies
geography
geography
case studies
Mind Map by
sinjinibasu.sb
, updated more than 1 year ago
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Created by
sinjinibasu.sb
about 11 years ago
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Resource summary
Athabasca Glacier
Outlet Valley Glacier flowing north-eastwards from the Canadian Ice Fields
In Jasper National Park in the Canadian Rockies
6 km long and 1 km wide, covering 10 km2
Evidence of Retreat
Pictures
Transverse crevasses caused when glacier flows downhill
Diagonal crevasses caused by friction slowing down the glacier
Monitoring Data
Glacier retreated 1500 m since middle of 19th century
Rate of retreat has increased:
170m from 1840 to 1906 (66 years)
500m from 1945 to 1992 (47 years)
Terminal Moraine marks the extent of the glacier
Scientists predict that the glacier will be gone in another 300 years
Amount of meltwater
Sunwapta Lake shows where glacier melted
Channels of meltwater on surface of glacier
Causes of Retreat
Ablation exceeding accumulation over a period of time
Increasing Temperatures
Natural changes
Global warming
Average temperature rise is about 0.9'C
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