More About Daily Images and Graphs
Daily Sea Ice Extent
These images show the extent of ocean covered by ice at any concentration greater than 15 percent for a given day. This snapshot of current ice conditions may be missing data (missing data appears as gray dots or areas). The median line (orange in images) shows a typical ice extent for that day based on data from 1979 through 2000. We assume that the area around the North Pole that the satellite does not image is covered by ice at more than 15 percent concentration.
Daily Sea Ice Concentration
These images show the percentage of ice cover for each roughly 25-kilometer-square data cell that is more than 15 percent covered by ice on a given day. The daily images may be missing data (missing data appears as dark grey dots or areas). The area around the North Pole that is not imaged by the satellite is excluded from the area because there is no way to know what the concentration is within this area.