Icebergs are blocks of freshwater ice that flow, called "calving" glaciers and floating in the sea. Icebergs are found in both Arctic and Antarctic regions, but differ in shape and size of each region. Arctic icebergs are formed from mountain glaciers and are generally tall and narrow. Icebergs called castle, above the water forms resemble the towers. In Antarctica, large, huge and at some point, upper flat pieces of ice break off of ice shelves and are called tabular icebergs. The Arctic produces 10,000 to 50,000 icebergs annually and typically have a four year life.To be classified as an iceberg, the ice must originate in glaciers. The height must be greater than 15 feet (5 meters) above sea level, the thickness should be 95-160 feet (30-50 meters), and the area must cover at least 1,500 square feet (500 square meters). There are small pieces of ice known as bergy bits and growlers. Bergy bits and growlers may come from the glacier or ice shelf, and can also be the result of an enormous iceberg that has broken.
Icebergs are usually white or light blue. White is snow on the iceberg. The blue light is due to scattering of light blue, in the same way that the sky blue. However, there are icebergs in which, during their training, different colored earthy materials embedded in the ice.
A "little iceberg" is classified as a medium piece of ice. Its height is usually more than 3 feet (1 meter), but less than 15 feet (5 meters) above sea level and its area is normally about 300-900 square feet (100 to 300 square meters).
Growlers are small pieces of ice and are about the size of a truck or a grand piano. They are often transparent, but can appear green or black color. Extend to within 3 feet (1 meter) above the sea surface and covers an area of approximately 60 square feet (20 square meters). The green color comes from algae that grow on the submerged portion that is exposed when she turns around to see.
The icebergs are as much a threat to the shipping industry today as they were in 1912. The captains are tired of the smaller pieces. As a result of the sinking of RMS Titanic, the Guard patrols the ice began to plot the location of icebergs. Until the Second World War, patrols have been conducted routinely ice this control. After the war, aerial surveillance became the primary method of examination of ice.
Today is the Coast Guard's authority to operate the International Ice Patrol (IIP)-translates as International Ice Patrol. Its mission is to control the dangerous icebergs near the Grand Banks of Newfoundland, provided the limits of all the ice and make them known to the maritime community. The ships in the vicinity of the "ice edge" usually pass just south of the border.
The vessels passing to monitor ice edge at risk of a collision with an iceberg. In this area, the Labrador Current crosses the warm Gulf Stream. The temperature differences between the two bodies of water can reach 36 ° F (20 ° C), which often results in a dense mist. The combination of icebergs, fog, severe storms, fishing vessels and shipping lanes makes this area one of the most dangerous to navigate.
Category
Height
Length
Growler
<3 feet (<1 m)
<16 feet (5 m)
Bergy Bit
13.3 feet (1.4 m)
15-46 feet (5.14 m)
Small
14-50 feet (5-15 m)
47-200 feet (15-60 m)
Medium
51-150 feet (16-45 m)
201-400 feet (61-122 m)
Large
151-240 feet (46-75 m)
401-670 feet (123-213 m)
Very Large
> 240 feet (> 75 m)
> 670 feet (> 213 m)
The NIC (National Ice Centre) is a unique team of U.S. government, as it is composed of U.S. Navy, USCG, and NOAA on active duty and civilian personnel. While the international investment position, by the USCG, monitors the activity of the iceberg in transatlantic shipping routes, the network card monitors the activity of the iceberg in Antarctica
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