Week 3: Summary

Antarctic sea ice reached a record maximum in 2012, how is this best explained?

Recent increases in circumpolar wind strength has blown the sea-ice outward so extent has increased.

What is the current atmospheric concentration of carbon dioxide in parts per million (ppm)?

400 ppm

Which of these countries has the highest carbon emissions per capita?

USA

Which of these is the largest carbon store?

Deep ocean
 

Why is the Arctic experiencing the largest warming on Earth?

Ice-albedo feedback