Sea Ice Index

July 1, 2013: The Sea Ice Index team has replaced the
22-year base period with a new 30-year version. Read more.

More About Daily Images

April 2010 Sea Ice Extent for the Northern Hemisphere
April 2010 Sea Ice Extent for the Southern Hemisphere

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 1981 through 2010. The area around the North Pole that the satellite does not image is assumed to be covered by ice at more than 15 percent concentration.

See documentation for more details »

April 2010 Sea Ice Extent for the Northern Hemisphere
April 2010 Sea Ice Extent for the Southern Hemisphere

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.

See documentation for more details »