World’s Largest Iceberg, A23a, Runs Aground Near South Georgia Island
The world’s largest iceberg, A23a, has run aground off the coast of South Georgia in the sub-Antarctic region, according to the British Antarctic Survey (BAS). Measuring twice the size of Greater London and slightly smaller than Rhode Island, the iceberg weighs nearly a trillion tons.
A23a originally split from Antarctica’s Filchner Ice Shelf in 1986 and remained grounded for over 30 years. However, since 2020, it has been drifting north with ocean currents before becoming lodged on the continental shelf about 56 miles from South Georgia.
Experts do not expect immediate harm to local wildlife but warn that the iceberg may disrupt commercial fishing operations. Oceanographer Dr. Andrew Meijers stated that while A23a remains intact for now, it is likely to break apart due to increased stress.
Despite potential challenges, scientists note that the iceberg could benefit the ecosystem. “If the berg is stimulating ocean productivity, this could actually boost populations of local predators like seals and penguins,” Meijers explained.
Since 2000, ice shelves have lost approximately 6 trillion tons of mass, significantly impacting ocean circulation and contributing to rising sea levels. However, scientists are surprised by A23a’s longevity, as it has only lost about a quarter of its original size.