pack ice


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Related to pack ice: ice floe, Ice pack therapy

pack ice

a large area of floating ice, usually occurring in polar seas, consisting of separate pieces that have become massed together

Pack Ice

 

polar sea ice that has lasted through more than two annual cycles of buildup and thaw. It is usually observed in the form of vast ice fields in the Arctic Basin and as shore ice along the northern coasts of Greenland, in the northern straits of the Canadian Arctic Ocean archipelago, and in Antarctica. Hummocks in fields of pack ice are usually smoothed out by recurrent thaws, and as a result the fields tend to be rolling. Extensive pack ice makes passage by ships impossible and presents a serious obstacle to navigation along the pack’s southern margin. Pack ice accounts for 60–90 percent of the ice sheet of the Arctic basin, depending on how far south the pack ice extends.

pack ice

[′pak ‚īs]
(oceanography)
Any area of sea ice, except fast ice, composed of a heterogeneous mixture of ice of varying ages and sizes, and formed by the packing together of pieces of floating ice. Also known as ice canopy; ice pack; pack.
References in periodicals archive ?
Having abandoned his own vessel under protest, McClure later argued that sledging across the pack ice to HMS Resolute, and then continuing home in another ship, constituted completion of the Northwest Passage.
A sign of how quickly the environment can unexpectedly change around Antarctica came the next day when we had some luck: a southwesterly wind had shifted some of the pack ice around and the latest satellite maps showed clear paths to the continent.
Pack ice in the gulf tends to raft and ridge frequently-the proportion of ridged ice usually rises to 25% in February (SMHI 1982).
Danger: The adventurers had to ski over huge cracks in the pack ice during the charity trek to the North Pole which has so far raised more than pounds 208,000.
Pugh, 38, made it to 81 degrees north latitude before hitting solid pack ice.
With one companion, Webb, an undergraduate geography student at the time, rowed through pack ice and past glaciers and icebergs, mostly for the adventure.
A BRITISH trawler that has been stuck in pack ice in the Antarctic since before Christmas was yesterday hoping to start up its engine and release itself following a US rescue mission.
For the first time, Australian scientists will use aircraft to count minke whales in the pack ice around Antarctica.
When large sections of pack ice separate they are known as floes and can move on the surface.
Days 4-5: We cross 80iN latitude and penetrate the frozen world of the age-long pack ice, towering volcanic mountains, icebergs and glaciers.
Working their way through the pack ice, the intention will be to make landfall at Cape Denison.
Plenty has been written about pack ice and floating, frozen expanses of ice; but few books provide much detail.