Breakaway iceberg raises concerns over Antarctica’s Thwaites glacier

A giant iceberg that was attached to the seafloor in front of Thwaites Glacier in West Antarctica for 20 years and helped protect it is now floating.

To Michael Le Paige

A giant iceberg that helped slow the loss of floating ice from Thwaites Glacier in West Antarctica has become immobile.

The iceberg, about 85 kilometers long and 64 kilometers wide, separated from a glacier-formed floating ice shelf in March 2002, but was stuck in a shallow part of the Amundsen Sea about 100 kilometers. over there.

Its presence helped anchor sea ice formed by freezing…