jégmagokból

Jégmagokból, also known as icebergs, are large pieces of ice that have broken off from glaciers or ice shelves and have floated into the ocean. They are primarily composed of fresh water and can vary greatly in size, from small fragments to those larger than a city block. Icebergs are formed through a process called calving, where large chunks of ice break away from the main ice mass.

The term "iceberg" comes from the Old Norse words "ís" meaning ice, and "berg" meaning mountain. The majority of an iceberg's mass is submerged beneath the water's surface, with only about 10% of its volume visible above the waterline. This is due to the fact that water has a lower density than ice, causing icebergs to float with a significant portion of their mass hidden underwater.

Icebergs play a crucial role in the Earth's climate system. They transport large amounts of fresh water from polar regions to lower latitudes, influencing ocean currents and affecting global climate patterns. Additionally, icebergs can pose navigational hazards to ships, as the submerged portion can be deceptively large, leading to potential collisions.

The study of icebergs is an important field within glaciology, the scientific study of glaciers and ice. Researchers use various methods, including satellite imagery and underwater surveys, to monitor iceberg movement, track their origins, and understand their impact on the environment.