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 ?
Apparent results of the deformation are drift and ridging events on the ice field, also opening leads in pack ice.
HAVING braved bone-freezing temperatures, polar bears and gaping fissures in the pack ice to conquer the North Pole, Paul Taroni and Andrew Taylor did what any self-respecting Brummie would.
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".
T he other great phenomenon we await is pack ice in the Mersey.
One eats only marine mammals, frequently knocking seals off pack ice to catch its prey.
The Viking Line vessel Amorella was just one of six ferries that got trapped in pack ice in the Baltic Sea.
The profiler collects information each day on its position in the moving pack ice and takes measurements of seawater pressure, temperature, and salt content.
The approach to the Continent through light pack ice was magnificent.
Tireless, which had 130 crewmen on board, surfaced immediately, punching a hole through the pack ice for survivors to be airlifted to safety.
Pugh, 38, made it to 81 degrees north latitude before hitting solid pack ice.