Up Close With a Calving Antarctic Iceberg

Last year, an iceberg the size of Manhattan calved off the vast Getz Ice Shelf in West Antarctica and pushed off into the ocean. The shoreline cliffs of this frosty new island, dubbed Iceberg B-34, would rise hundreds of feet above the surface, and stretch some 1,000 feet below the Amundsen Sea. And yet, this sensational event pales in comparison to the persistent melt here.

An ice shelf forms where inland glaciers meet the ocean. Here, sheets of ice slowly slide off land, where they perm

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