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How large is the tundra
8 million km3 across Alaska
Mean annual temp
-15 degrees Celsius
Total rainfall
less than 100mm
Growing season
Short - 3 months
How many months is Alaska below freezing
8-9 months
When was oil discovered at Prudhoe Bay
1968, then Trans-Alaskan pipeline built
What were the human impacts of oil production
infrastructure transfers heat, removes insulating layer of vegetation, dark dust on snow, increased Albedo effect.
Spring melt - seasonal pattern
Yukon river, summer discharge = 340 cumecs, winter = 24,600 cumecs
Winter - stored as ice
Spring - rapid thaw - flood risk
Summer - Wetlands expand
Autumn - Refreezing begins