Climate Change in Alaska CCEA AS Unit 2

By how much have Alaskan temperatures increased on average over the past 50 years?

• 1.5°C

• 2.5°C

• 1.9°C

• 4.5°C

What is the average winter warming in Alaska?

• 1.5°C

• 2.5°C

• 3.5°C

• 4.5°C

By how much are average annual temperatures in Alaska projected to increase by 2050?

• 1-2°C

• 2-3°C

• 3-4°C

• 4-5°C

What is the percentage increase in the number of growing days in Alaska?

• 10%

• 15%

• 20%

• 25%

What has led to an increase in salmon numbers in Alaska?

• Increase in sea temperatures

• Decrease in sea temperatures

• Increase in rainfall

• Decrease in rainfall

What could be a potential negative impact of further warming in Alaska?

• Increase in jellyfish numbers

• Decrease in salmon numbers

• Increase in forest productivity

• Increase in growing days

By how much have soil temperatures at 1 metre depth risen in Alaska?

• 1.5°C

• 2.0°C

• 2.5°C

• 3.0°C

By when is near surface permafrost predicted to be lost entirely from Alaska?

• 2030

• 2050

• 2070

• 2100

What percentage of land in Alaska is vulnerable to subsidence if thawing occurs?

• 40%

• 50%

• 60%

• 70%

By how much will the cost of maintaining infrastructure increase by 2030 due to permafrost thawing?

• Between $1 & $2 billion

• Between $2 & $3 billion

• Between $3 & $6 billion

• Between $9 & $10 billion