A huge iceberg, seven times the size of New York City, broke off of Antarctica, scientists said Wednesday. The iceberg that broke away is 5,800-square-kilometers large. It is described as weighing 1 trillion tons. That is about the same volume as the great Lake Erie between Canada and the U.S. Scientists at the University of Swansea in Britain described the iceberg as one of the largest ever recorded. It broke off from the Larsen C ice shelf over the last few days. The Larsen ice shelf is located off the coast of northwestern Antarctica. The area is connected to land, but floats on seawater instead of sitting on top of the continent. The process of the ice breaking away and moving into the ocean is known as calving. Researchers are watching closely to see whether climate change is affecting the calving process.