From NASA's Earth Observatory:
Click here to view full image (270 kb)
In the Arctic, sea ice extent fluctuates with the seasons. It reaches its peak extent in March, near the end of Northern Hemisphere winter, and its minimum extent in September, at the end of the summer thaw. In September 2007, Arctic sea ice extent was the smallest area on record since satellites began collecting measurements about 30 years ago.
Although a cold winter allowed sea ice to re-cover much of the Arctic in the months that followed, this pair of images reveals that conditions were far from normal. The February 2008 ice pack (right) contained much more young ice than the long-term average (left). In the past, more ice survived the summer melt season and had the chance to thicken over the following winter. This perennial ice generally gets thicker each winter, which makes it more likely to survive the next summer.
Full story at: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17975
Click here to view full image (270 kb)
In the Arctic, sea ice extent fluctuates with the seasons. It reaches its peak extent in March, near the end of Northern Hemisphere winter, and its minimum extent in September, at the end of the summer thaw. In September 2007, Arctic sea ice extent was the smallest area on record since satellites began collecting measurements about 30 years ago.
Although a cold winter allowed sea ice to re-cover much of the Arctic in the months that followed, this pair of images reveals that conditions were far from normal. The February 2008 ice pack (right) contained much more young ice than the long-term average (left). In the past, more ice survived the summer melt season and had the chance to thicken over the following winter. This perennial ice generally gets thicker each winter, which makes it more likely to survive the next summer.
Full story at: http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17975
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