File name: ClimateDashboard_Arctic-sea-ice_graph_20211115_1400px.jpg
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Sea ice extent in the Arctic at the end of the summer melt season each September from 1979–2021, based on satellite observations. The total extent is the area of all pixels in the satellite image where the ice concentration is at least 15 percent. The amount of sea ice ice that survives the summer melt is declining rapidly. NOAA Climate.gov graph, based on extent data from the National Snow and Ice Data Center.