File name: ClimateDashboard-Arctic-sea-ice-image-20210916-1400px.jpg
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Arctic sea ice concentration on September 16, 2021, the day with the smallest ice extent of the year, based on satellite images. Extent is the total area of ocean that's at least 15 percent ice covered. The gold line is the median extent for 1981-2010: half of years had smaller extents, half had larger. NOAA Climate.gov image, based on data from the National Snow and Ice Data Center.