The Earth’s largest iceberg, A23a, which specialists from the Arctic and Antarctic Research Institute (AARI) have monitored for four decades, is concluding its existence. This was announced by the institute’s press service on April 21st.
“As recently as last year, iceberg A23a held the title of the world’s largest, but by September of last year, it relinquished this status,” stated Polina Soloshchuk, the lead specialist at AARI’s Center for Ice and Hydrometeorological Information, via the official Telegram channel. According to polar researchers, the iceberg’s surface area was roughly 1300 sq. km in January, but by now, it has diminished to under 50 sq. km. The massive chunk has fragmented into numerous smaller pieces. Over its entire lifespan, the iceberg has lost 99% of its initial surface area.
Soloshchuk also noted that the object continues its drift across open water, “breaking apart visibly before our very eyes.” In the last three months alone, the iceberg traversed approximately 1000 km, crossing the boundary between the Southern and Atlantic Oceans, and is presently situated around 49° South latitude.
Iceberg A23a originated in 1986, having calved from the Filchner Ice Shelf’s outer edge. At its formation, its area spanned 4170 sq. km, an expanse nearly double the size of Saint Petersburg. For over three decades, this huge ice mass remained aground in the central Weddell Sea.
Its movement along the Antarctic coastline commenced later, and by mid-November 2023, the iceberg had drifted into open water. It continued moving northward until the beginning of 2025, at which point it neared South Georgia Island.
On January 4th, The New York Times reported that an international team of scientists aboard a New Zealand icebreaker had departed to study the ‘Doomsday Glacier’ in Antarctica. According to the publication, approximately 40 specialists will spend about a month at the glacier’s edge, scanning the ice to gather precise data on its rate of disintegration.
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