World's largest iceberg forms off coast of Antarctica

An enormous slab of ice nearly six times the size of New York City has calved from the frozen coastline of Antarctica into the Weddell Sea, becoming the largest iceberg afloat on the planet.

The iceberg broke off the western side of the Ronne Ice Shelf, which is the second-largest ice shelf in Antarctica, Earth’s southernmost continent. The newly formed berg was first spotted on May 13 by Keith Makinson, a polar oceanographer and drilling engineer for the British Antarctic Survey. It was later confirmed by Christopher Readinger, an ice analyst at the U.S. National Ice Center, who used satellite imagery from the European Space Agency’s Copernicus Sentinel-1 mission.

PHOTO: A view of the newly calved iceberg dubbed A-76, the largest currently afloat in the world, is captured by the European Space Agency''s Copernicus Sentinel-1 mission in this handout photo dated May 16, 2021.

The iceberg, dubbed A-76, is approximately 1,668 square miles in size, making it slightly larger than the Spanish island of Majorca. Another berg afloat in the Weddell Sea, dubbed A-23A, was previously the world’s largest with a surface area of around 1,498 square miles, according to the European Space Agency.

The names of icebergs are derived from the Antarctic quadrant in which they were originally sighted, followed by a sequential number, then — if a new iceberg breaks from an already named one — a sequential letter, according to the U.S. National Ice Center.

Earlier this year, a 490-square mile iceberg split from Antarctica’s Brunt Ice Shelf into the Weddell Sea. The berg was also larger than New York City, which has a land area of about 302 square miles.

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