World’s Largest Iceberg A23a Drifts Free In Southern Ocean

The world’s largest iceberg, A23a, has started drifting in Southern Ocean. This massive iceberg, which is roughly double the size of Greater London and weighs approximately one trillion tonnes, broke off from Antarctica’s Filchner Ice Shelf in 1986. Since then, it had remained stuck on the seabed near the South Orkney Islands in Weddell Sea until it began its slow movement northwards in 2020.