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The previously stuck A23a iceberg is trapped again, spinning in a rare ocean vortex Iceberg A23a — equivalent to the size of Rhode Island — has been near the South Orkney Islands since January ...

NASA image of A23a taken on November 28, 2023. This iceberg is caught in a vortex and may be trapped for years. NASA Earth Observatory images by Wanmei Liang, using MODIS data from NASA EOSDIS ...

About the size of Rhode Island, the iceberg known as A23a got stuck in an ocean vortex this summer, spinning in place for months. Now, it's free, and heading back into open Antarctic waters.

Iceberg A23a — equivalent to the size of Rhode Island — has been near the South Orkney Islands since January, completing one full rotation every 24 days or so.

In other words, A23a is trapped in a kind of ocean vortex. Till Wagner, a professor at the University of Wisconsin-Madison who studies how ice interacts with climate, ...

It's unclear how often Taylor columns form in the ocean and how frequently icebergs get trapped in them. In the case of A23a, it's anyone's guess how long it will spin in the vortex.

The world's largest iceberg, A23a, is stuck again. For more than 30 years, the giant frozen block — equivalent to the size of Rhode Island — was grounded on the sea floor in Antarctic coastal waters.