ELSS - Arctic Tundra Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Average Precipitation per year in artic?

A

50-350mm per year, mostly snow

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2
Q

How productive is the Arctic soil?

A

Second lowest productivity of any biomes - low biodiversity

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3
Q

Average temperature in the Arctic?

A

Average winter temperature = - 34 degrees Celsius
Average summer temperature = 10 degrees Celsius

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4
Q

Net primary production in the Arctic

A

200g/m^2/year NPP (Net Primary Production)

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5
Q

How does the oil and gas industry affect the water cycle in the Arctic

A

Increased greenhouse gas emissions has increased:
- Permafrost thawing
- Sea ice melt
Removed vegetation reducing transpiration

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6
Q

How much oil and gas is produced in the arctic (% of total globally)

A

10% of oil
25% of natural gas

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7
Q

What does Permafrost thawing release

A

Methane
CO2

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8
Q

How much has surface air temperature risen due to climate change?

A

3.5 degrees since the 1900’s

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9
Q

Where is the Arctic Tundra located?

A

occupies 8 million km2 in Northern Canada, Alaska and Siberia

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10
Q

how months of the year is the ground frozen

A

for 8 to 9 months a year, tundra has temps below freezing = ground permanently frozen with only the top metre or so thawing in Arctic summer

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11
Q

permafrost estimated to hold how much carbon ?

A

1600 Gt

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12
Q

How much carbon in the antarctic ice?

A

20,000BT

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