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Keywords from Image Description:
NorthernHemisphereSeaIceExtenttrendsep. en Northern Hemisphere Sea Ice Extent in September Data source org NSIDC Sea Ice Index See also arctic noaa gov shtml NOAA webpage on Arctic Change ja org NSIDC Sea Ice Index arctic noaa gov shtml NOAA webpage on Arctic Change NSIDC Sea Ice Index org skei Cczero Climate change