Ice covering more than half of the visible sea surface.
an area of floating islands of ice that form floes a few feet wide to ice islands miles across. These islands drift in the center of the Arctic Ocean and occasionally drift South as far as Newfoundland.
An area of sea-ice other than fast ice, no matter what form it takes or how it is disposed.
Ice that is not anchored to land and which moves with ocean currents and wind.
The core of the Arctic Ocean, half of which melts and refreezes each year.
Sea water which freezes and forms into large floes. Also known as sea ice, it is different from icebergs.
a large expanse of floating ice
sea ice made up of a floating mosaic of plates of ice that is free to drift with currents, tides and wind (cf. fast ice).
Broken pieces of floating ice which forms when storms or warmer weather melt the sea ice.
any area of sea, river, or lake ice other than fast ice
long lasting ice cover over ocean water
(Also called ice pack.) All sea ice other than fast ice; thus, sea ice that is capable of substantial motion and deformation.
1. Floating ice that has been driven together into a single mass. 2. Floating consolidated sea ice that is either detached from land and freely floating, or has been blocked by land-attached ice while drifting past.
Mass of floating pieces of ice driven together to form a solid layer.
Pack ice is large blocks of ice on the surface of the ocean, usually in polar regions. They form when an ice field is broken up by strong waves and wind.
ice that is not attached to the shoreline and drifts in response to winds, currents, and other forces; some prefer the generic term drift ice, and reserve pack ice to mean drift ice that is closely packed.