Average temperature in Arctic has risen more than 2°C in half a century

Every day it gets harder to ignore the alarmingly rapid changes to the global climate. According to the Arctic Climate Impact Assessment the average temperature in the Arctic has risen between 2-3 degrees Celsius over the last half a century. A CNN article entitled Warm climate transforms Alaska terrain provides us with a stark reminder of how rapidly things can change with Alaska experiencing sinking villages, record wildfires and rapidly shrinking sea ice. The question is, even with the will, can these changes be reversed?