1How many km? of Northern Canada, Alaska and Siberia does the tundra occupy?
8million km2
2Winter temperatures can drop how low?
-40c
3What is the annual precipitation?
50mm
4How much carbon is stored by the permafrost?
1600GT
5 What is the Tundra's Net Primary Productivity (grams/m?/year)?
200
6What is the Tundra's biomass (tonnes/hectare)?
4
7How long has the carbon been locked away in the Tundra?
500,000 years
8 When was oll discovered at Prudhoe Bay?
1968
9What percentage of the USA's domestic oil comes from Alaska?
6%
10How much CO, has been lost through permafrost melting on the North Slope?
7million
11How much CH, has been fast through permafrost melting on the North Slope?
24000 tonnes/year