The images show sea ice concentration
in percent as a color from blue (0% -ice free open water) to red
(100% sea ice). To assist in interpreting the images, the 50%
sea ice concentration contour is also displayed as the thin black
line. Land masses are shown in white with coastlines as the thick
black line. Bouvet
Island, the most isolated island in the world, is indicated on
all images from 1999.