Spring pack ice cover in the Chukchi Sea.

Spring pack ice cover in the Chukchi Sea. The Arctic pack ice is not a homogenous layer of ice, but consists of individual ice floes, that contain undeformed level ice and various amounts of pressure ridges. Some ridges can be deeper than 20m. Image courtesy of Rolf Gradinger, University of Alaska Fairbanks (UAF)

Related Links

The Hidden Ocean, Arctic 2005

The Hidden Ocean Arctic 2005: Sea Ice

NOAA Ocean Explorer Gallery