One year ago, Iceberg A-68 calved away from the Larsen C Ice Shelf. One quarter the size of Wales, and weighing more than a trillion tonnes, this iceberg has been classified as the sixth largest since records began. As can be seen in the satellite image animation, over the last year A-68 has not drifted far because of dense sea-ice cover in the Weddell Sea.

Time-series of Sentinel-1 satellite radar imagery showing the rift, calving, and subsequent journey of Iceberg A-68

The iceberg has been pushed around by ocean currents, tides and winds, and its northern end has repeatedly been grounded in shallower water near Bawden Ice Rise. These groundings led eventually to further pieces of the iceberg being shattered off in May 2018. Whilst not quite large enough to be given labels themselves, the total area of icebergs lost from A-68 in May was the size of a small city.

The MIDAS Project will continue to monitor the fate of Iceberg A-68, and the ongoing impact of the calving on the Larsen C Ice Shelf. Further updates will be available occasionally on this blog, and more frequently via Twitter.

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