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.
While our ship had been able to cut through the young, thin sea ice at lower latitudes, the pack ice from 65 degrees south had proved more tricky.
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.
When I showed Richard Glenn [an ice geologist in Barrow] the list, he added sugainnuq and defined it as "huge, moving ice that threatens integrity of the lead edge; could be large piece of pack ice or agglomeration of multiyear ice and first-year ice".
The profiler collects information each day on its position in the moving pack ice and takes measurements of seawater pressure, temperature, and salt content.
Tireless, which had 130 crewmen on board, surfaced immediately, punching a hole through the pack ice for survivors to be airlifted to safety.
British explorer Lewis Gordon Pugh has declared that he has kayaked further to the top of the world than anyone else ever has, even as his bid to reach the North Pole failed - much to his delight.But the renowned extreme swimmer, dubbed the human polar bear, nonetheless warned the Arctic ice pack was thinning and urged world leaders to take immediate action to halt it.Pugh, 38, made it to 81 degrees north latitude before hitting solid pack ice. He temporarily planted the flags of 192 nations and territories into a floe in a bid for worldwide attention to the issue of climate change.eIuLast year at this latitude I saw three-metre-thick 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.