Between 10,000 to 15,000 icebergs are calved each year.
The principal origin of icebergs that reach the North Atlantic Ocean are the 100 or so major tidewater glaciers of West Greenland. Between 10,000 to 15,000 icebergs are calved each year, primarily from 20 major glaciers between the Jacobshaven and Humboldt Glaciers.
When an iceberg reaches warm waters, the new climate attacks it from all sides.
On the iceberg surface, warm air melts snow and ice into pools called melt ponds that can trickle through the iceberg and widen cracks. At the same time, warm water laps at the iceberg edges, melting the ice and causing chunks of ice to break off.
On the underside, warmer waters melt the iceberg from the bottom up.
Icebergs can also serve as tools for scientists, who study them to learn more about climate and ocean processes.
The International Ice Patrol uses airplanes and radars to track icebergs that float into major shipping lanes. The U.S. National Ice Center uses satellite data to monitor icebergs near Antarctica. However, it only tracks icebergs larger than 500 square meters (5,400 square feet).