120040
Descrição
Mapa Mental por sinjinibasu.sb, atualizado more than 1 year ago
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Criado por sinjinibasu.sb
mais de 11 anos atrás
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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
- Transverse crevasses
caused when glacier flows
downhill
- 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)
- 170m from 1840
to 1906 (66
years)
- Terminal Moraine
marks the extent of the
glacier
- Scientists predict that
the glacier will be gone
in another 300 years
- Glacier
retreated 1500
m since middle
of 19th century
- Amount of meltwater
- Sunwapta Lake
shows where glacier
melted
- Channels of
meltwater on surface
of glacier
- Sunwapta Lake
shows where glacier
melted
- Pictures
- 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
- Natural changes
- Ablation exceeding accumulation
over a period of time
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