SAN FRANCISCO: A giant slab of ice bigger than the Spanish island of Majorca has sheared off from the frozen edge of Antarctica into the Weddell Sea, becoming the largest iceberg afloat in the world, the European Space Agency said.
The newly calved berg, designated A-76 by scientists, was spotted in recent satellite images captured by the Copernicus Sentinel-1 mission, the space agency said in a statement posted on its website with a photo of the enormous, oblong ice sheet.
Its surface area spans 4,320 square km (1,668 square miles) and measures 175 km (106 miles) long by 25 km (15 miles) wide.
By comparison, Spain’s tourist island of Majorca in the Mediterranean occupies 3,640 square km (1,405 square miles). The U. state of Rhode Island is smaller still, with a landmass of just 2,678 square km (1,034 square miles).
The enormity of A-76, which broke away from Antarctica’s Ronne Ice Shelf, ranks as the largest existing iceberg on the planet, surpassing the now second-place A-23A, about 3,380 square km (1,305 square miles) in size and also floating in the Weddell Sea.
Another massive Antarctic iceberg that had threatened a penguin-populated island off the southern tip of South America has since lost much of its mass and broken into pieces, scientists said earlier this year.
Meet the new cool kid on the iceberg block: the recently calved #A76 is now the biggest iceberg in the world!
The iceberg was spotted by @BAS_News and confirmed from @usnatice using @CopernicusEU #Sentinel1 imagery.
Here’s how it looked on 16 May????https://t.co/GgFk6kIJLv pic.twitter.com/xOVWjidsZw— ESA EarthObservation (@ESA_EO) May 19, 2021
A-76 was first detected by the British Antarctic Survey and confirmed by the US National Ice Centre using imagery from Copernicus Sentinel-1, consisting of two polar-orbiting satellites.
The Ronne Ice Shelf near the base of the Antarctic Peninsula is one of the largest of several enormous floating sheets of ice that connect to the continent’s landmass and extend out into surrounding seas.
Periodic calving of large chunks of those shelves is part of a natural cycle, and the breaking off of A-76, which is likely to split into two or three pieces soon, is not linked to climate change, said Ted Scambos, a research glaciologist at the University of Colorado at Boulder.
An iceberg about the size of Mallorca has calved from Antarctica, making it the biggest iceberg in the world. https://t.co/VvzUUOYkJo
— Greta Thunberg (@GretaThunberg) May 20, 2021
Scambos said the Ronne and another vast ice shelf, the Ross, have “behaved in a stable, quasi-periodic fashion” over the past century or more. Because the ice was already floating in the sea before dislodging from the coast, its break-away does not raise ocean levels, he said.
Some ice shelves along the Antarctic peninsula, farther from the South Pole, have undergone rapid disintegration in recent years, a phenomenon scientists believe may be related to global warming, according to the US National Snow & Ice Data Centre.
