NOAA Ocean Today: The Role of Ice in the Ocean, PART 1 of 3: What is Sea Ice & Why Is it Shrinking?

The 2012 Arctic summer sea ice extent is the lowest since taking measurement. This three-part video series explores sea ice and why it is so important; how scientists are detecting and measuring change in sea ice; and the impacts of shrinking Arctic sea ice.

Part 1: http://oceantoday.noaa.gov/role-of-ice-pt1/
Part 2: http://oceantoday.noaa.gov/role-of-ice-pt2/
Part 3: http://oceantoday.noaa.gov/role-of-ice-pt3/

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