Loss of giant ice sections from Antarctica—the most recent a Delaware-sized piece that broke off in July 2017—is the subject of the following two PBS NewsHour videos.
“One of the biggest icebergs ever just broke off Antarctica. Here’s what scientists want to know,” broadcast on July 12, 2017 (8 minutes/26 seconds) describes this July 2017 break-off of the Delaware-sized iceberg and gives background on Antarctica’s ice geography, other notable ice rifts, and scientists’ efforts to assess the connection of these developments to climate changes and their potential for contributing to sea-level rises; the video is available online at http://www.pbs.org/newshour/bb/one-biggest-icebergs-ever-just-broke-off-antarctica-heres-scientists-want-know/.
A March 8, 2017, segment on the subject was “How scientists are tracking a massive iceberg in the making.” That 5 min./55 second video, available online at http://www.pbs.org/newshour/bb/scientists-tracking-massive-iceberg-making/, describes some of the satellite technology and imagery used to track such large-scale changes.
More information on changes to the Larsen Ice Shelf is available from the National Aeronautic and Space Agency (NASA), “Antarctica’s Changing Larsen Ice Shelf,” online at https://www.nasa.gov/image-feature/antarctica-s-changing-larsen-ice-shelf.