iceberg


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iceberg,

mass of ice that has become detached, or calved, from the edge of an ice sheet or glacier and is floating on the ocean. Because ice is slightly less dense than water about one ninth of the total mass of a berg projects above the water. Greenland and other N Atlantic icebergs are usually peaked and irregular in shape; Antarctic icebergs are tabular, with flat tops and steep sides. Icebergs differ from other ocean ices: sea ice is formed directly from the freezing of ocean water; pack ice is tightly packed fragments of sea ice; ice floes are small, floating ice fragments that separate from pack ice; and fast ice is ice attached to a shore.

Greenland is the source of most of the icebergs in the N Atlantic, where the iceberg season lasts roughly from February to October. As a consequence of the loss of the Titanic through collision with an iceberg in 1912, a patrol of N Atlantic shipping channels was initiated in 1914 by the international agreement of 16 nations. Patrols use planes and surface vessels equipped with radar, loran, and underwater sound equipment. A constant census of bergs is maintained, and the location of an iceberg is reported to any ship in its vicinity.

iceberg

[′īs‚bərg]
(oceanography)
A large mass of glacial ice broken off and drifted from parent glaciers or ice shelves along polar seas; it is distinguished from polar pack ice, which is sea ice, and from frozen seawater, whose rafted or hummocked fragments may resemble small icebergs.

iceberg

a large mass of ice floating in the sea, esp a mass that has broken off a polar glacier
References in periodicals archive ?
And since 1913, when the patrol started, no ship heeding its warnings has struck an iceberg.
Filmmaker Alex Cornell photographed this recently overturned iceberg jutting about 9 meters skyward in Cierva Cove, Antarctica, in December.
Fitted with ice-profiling sonar the vehicles will stay with an iceberg for 28 days at a time gathering data on ice thickness and volume as well as direction and drift.
The usual linear size of an iceberg is not large and measures 40-60 meters.
Washington, Apr 24 ( ANI ): Scientists have observed an iceberg bigger than the island of Guam, which is slowly moving away from an Antarctic glacier.
A massive iceberg or ice island of a whopping 255 square miles in size is moving into the ocean off Antarctica and could threaten shipping during the Antarctic winter, NASA has said.
THE most senior officer to survive the Titanic may have played down the iceberg collision to dodge negligence claims, insurance documents reveal.
Operation Iceberg (BBC Two, Tuesday, 9pm) | YOU'RE about to learn a whole lot more about icebergs thanks to this two-part documentary in which naturalist Chris Packham and ocean expert Helen Czerski, right, along with diver Andy Torbet, cameraman Doug Allan and doctor Chris Van Tulleken embark on an expedition to the Arctic to trace the life cycle of one of these giants of the seas.
From a base in the Aigas Feild Centre, Chris Packham, fresh from his iceberg adventure, joins Michaela Strachan and Martin Hughes-Games to monitor footage from outdoors and the Isle of Mull.
A massive iceberg, or ice island, broke off of the Petermann Glacier in 2010.
Between 1975 and 1981, Georges Mougin and Saudi prince Mohammed al-Faisal founded Iceberg Transport International (ITI), a company that aimed to bring Mougin's idea to exploit tabular icebergs for fresh water to reality.
What better way to celebrate the campaign and kick off the beginning of our involvement in DSS than by bringing a touch of Arctic chill to Dubai via the first manmade iceberg in the UAE, and probably worldwide