Iceberg

Iceberg is a large piece of freshwater ice that has broken off a glacier or an ice shelf and is floating freely in open water. It may subsequently become frozen into pack ice (one form of sea ice). As it drifts into shallower waters, it may come into contact with the seabed, a process referred to as seabed gouging by ice.

Formation

Icebergs are formed from glaciers, which are large masses of ice and snow compacted over thousands of years. When a glacier reaches the sea, large chunks of it break off due to the warming temperatures and the movement of the water. This process is known as calving.

Size and Shape

Icebergs vary in size from small bergy bits, large enough to be a hazard to ships, to ice islands, the size of a small country. The shape of icebergs is often irregular, and they can take many shapes, but they are typically tabular or non-tabular.

Impact on Marine Life

Icebergs can have a significant impact on the marine life. They serve as a habitat for a variety of organisms, including plankton, fish, and seabirds. They also contribute to the nutrient cycle in the ocean by releasing nutrients stored in the ice into the water.

Impact on Climate

Icebergs also play a role in the climate. They reflect sunlight back into space, helping to cool the Earth. However, when they melt, they contribute to sea level rise, which can have significant impacts on coastal communities.

See Also

• Glacier
• Climate Change
• Sea Level Rise

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