Is Climate Crisis to Blame?... World's Largest Antarctic Iceberg Breaking Up

"Expected to Break Up into Smaller Icebergs Within Weeks"

The world's largest iceberg has been observed rapidly breaking up into several very large pieces.

According to CNN on September 3 (local time), Andrew Myers, an oceanographer at the British Antarctic Survey (BAS), stated, "The A23a iceberg is breaking up rapidly, with very large fragments splitting off." He added, "The U.S. National Ice Center, which tracks these pieces, classifies them as large icebergs."

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The A23a iceberg, which originally weighed 1.1 trillion tons and covered an area of 3,672 square kilometers-slightly larger than the state of Rhode Island-has been closely monitored by scientists ever since it broke off from the Filchner-Ronne Ice Shelf in Antarctica in 1986. Since the 1980s, A23a has repeatedly held the title of "the world's largest iceberg." However, occasionally, larger but shorter-lived icebergs such as A68 in 2017 and A76 in 2021 have temporarily surpassed it.

Currently, the size of A23a has shrunk to about 1,700 square kilometers, which is roughly equivalent to the area of London, United Kingdom. After being grounded on the floor of the Weddell Sea in Antarctica for over 30 years, A23a began to move. In 2020, as it was swept along by ocean currents, the iceberg became trapped in a Taylor column-a swirling water vortex created when currents hit an underwater mountain. It resumed movement in December last year, but became grounded again on the continental shelf in March before drifting away once more in May.

"Expected to Break Up into Smaller Icebergs Within Weeks"

As A23a has diminished in size, the title of the world's largest iceberg has now passed to the D15a iceberg, which is located near Australia's Davis Station on the Antarctic coast and measures about 3,000 square kilometers. This iceberg, at approximately 3,000 square kilometers, is currently almost stationary. Myers commented, "A23a is currently the world's second-largest iceberg, but it will soon lose this status as it rapidly breaks up over the next few weeks." He predicted, "As the seawater warms and spring arrives in the Southern Hemisphere, A23a will soon fragment into icebergs too small to track." Like A68 in 2021 and A76 in 2023, A23a is expected to break up near South Georgia.

Myers explained, "Iceberg calving is a natural phenomenon," and added, "There are not enough cases of giant icebergs to determine whether such events are increasing due to global warming." However, he emphasized, "What is clear is that over the past several decades, the melting of icebergs has increased, resulting in the loss of trillions of tons of ice from ice shelves." He noted, "This is mostly due to ocean warming and changes in ocean currents."

This content was produced with the assistance of AI translation services.