Arctic sea ice has undergone "fundamental changes" over the past three decades
This animation shows the annual change in sea ice age in the Arctic at each year's minimum extent. Younger sea ice is shown in a dark shade of blue while the ice that is four years old or older is shown as white. A bar graph displayed in the lower right corner quantifies the area covered by the ice in each age category on the day of the annual minimum. In addition, memory bars (shown in green) portray the maximum annual value for each age range seen since January 1, 1984 on the day of the annual sea ice minimum extent.
