1 minute, 20 seconds

 This animation tracks the relative amount of ice of different ages from 1990 through early November 2016. Seasonal ice is darkest blue. Ice that is 9 or more years old is white. Video produced by the Climate.gov team, based on NOAA and NASA data provided by Mark Tschudi, University of Colorado-Boulder. Data processing by Hunter Allen. Editing by Bruce Sales. Narration by Deke Arndt, NCEI.