Arctic sea ice disappears in summer by 2050
Already
2007 lowest on record by 22%Abrupt Transitions in Summer Sea Ice
¥Gradual forcing results in abrupt
Sept ice decrease
¥Extent
decreases from 80 to 20% coverage in 10 years.
¥Relevant
factors:
¥Ice
thinning
¥Arctic
heat transport
¥Albedo
feedback
Trenberth from Holland et al.,
GRL, 2006
2007 x